Journal of the World Federation of Orthodontists最新文献_第10页

72 - Determining the optimal indicator for facial size changes: Height, weight, or Body Mass Index (BMI) alterations? 确定面部尺寸变化的最佳指标：身高、体重或身体质量指数（BMI）变化？

IF 3.2 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of the World Federation of Orthodontists

Pub Date : 2025-12-01 DOI: 10.1016/j.ejwf.2025.07.076

Malgorzata Bilinska , Agnieszka Garlicka , Peter Direr , Petra Kaminkova , Piotr Fudalej

Background: Identifying a simple and reliable indicator of facial size changes in children is crucial for optimizing orthodontic treatment. This is because the best timing for treatment often can aligns with periods of accelerated growth, which coincide with significant facial size changes.

Case Summary: The study seeks to determine the relationship between changes in facial soft tissue size and changes in height, weight, and BMI in developing children. Study involved 113 children (57 girls, 56 boys), average age of 11.8 years (SD = 1.9), recruited from schools in the Olomouc Region, Czech Republic. Facial morphology was captured at two 1-year intervals using a 3D stereophotogrammetric scanner, height and weight were recorded annually, BMI was calculated. Geometric morphometrics (14 fixed landmarks, 400 semi-landmarks) was applied to evaluate facial size. Centroid size (CS) was used as a measure of facial size. Descriptive statistics were used to summarize the sample, Generalized Procrustes analysis with multivariate regression models were employed to analyze the relationship between annual changes in CS (dependent variable) and changes in height, weight, BMI, sex and age (independent variables). The mean annual changes in CS were 35.6 (SD=23.1) and 53.4 (SD=27.9), mean annual height changes were 6.8 cm (SD=1.9) and 7.1 cm (SD=2.7), mean annual weight changes: 4.7 kg (SD=2.8) and 6.8 kg (SD=4.1) and mean annual BMI changes: 0.5 (SD=1) and 1.1 (SD=1.6). Regression models showed that the best predictor of CS change was weight change (R²=0.26, p<0.001), followed by height change (R²=0.15, p<0.001), and BMI change (R²=0.09, p=0.003). Age had no significant effect on CS change, but sex was associated with CS change, with boys showing more CS changes than girls (R²=0.15, p=0.003).

Conclusions: Monitoring changes in body weight appears to be a better indicator of facial size changes than tracking height in children.

背景：确定一种简单可靠的儿童面部大小变化指标对于优化正畸治疗至关重要。这是因为治疗的最佳时机通常与加速生长的时期一致，这与面部大小的显著变化相吻合。病例总结：本研究旨在确定发育中儿童面部软组织大小变化与身高、体重和BMI变化之间的关系。研究涉及113名儿童（57名女孩，56名男孩），平均年龄11.8岁（SD = 1.9），来自捷克共和国奥洛穆茨地区的学校。每隔2年使用3D立体摄影扫描仪捕捉面部形态，每年记录身高和体重，计算BMI。采用几何形态计量学（14个固定地标，400个半地标）评价面部大小。质心大小（CS）被用来衡量面部大小。采用描述性统计对样本进行汇总，采用多元回归模型的广义Procrustes分析分析CS（因变量）与身高、体重、BMI、性别、年龄（自变量）的年度变化之间的关系。CS年平均变化分别为35.6 （SD=23.1）和53.4 (SD=27.9)，身高年平均变化分别为6.8 cm （SD=1.9）和7.1 cm (SD=2.7)，体重年平均变化分别为4.7 kg （SD=2.8）和6.8 kg (SD=4.1)， BMI年平均变化分别为0.5 （SD=1）和1.1 （SD=1.6）。回归模型显示，CS变化的最佳预测因子是体重变化（R²=0.26,p= 0.001），其次是身高变化（R²=0.15,p= 0.001）和BMI变化（R²=0.09,p=0.003）。年龄对CS变化无显著影响，但性别与CS变化相关，男孩CS变化多于女孩（R²=0.15,p=0.003）。结论：监测体重变化似乎比追踪身高更能反映儿童面部尺寸的变化。

{"title":"72 - Determining the optimal indicator for facial size changes: Height, weight, or Body Mass Index (BMI) alterations?","authors":"Malgorzata Bilinska , Agnieszka Garlicka , Peter Direr , Petra Kaminkova , Piotr Fudalej","doi":"10.1016/j.ejwf.2025.07.076","DOIUrl":"10.1016/j.ejwf.2025.07.076","url":null,"abstract":"<div><div><strong>Background:</strong> Identifying a simple and reliable indicator of facial size changes in children is crucial for optimizing orthodontic treatment. This is because the best timing for treatment often can aligns with periods of accelerated growth, which coincide with significant facial size changes.</div><div><strong>Case Summary:</strong> The study seeks to determine the relationship between changes in facial soft tissue size and changes in height, weight, and BMI in developing children. Study involved 113 children (57 girls, 56 boys), average age of 11.8 years (SD = 1.9), recruited from schools in the Olomouc Region, Czech Republic. Facial morphology was captured at two 1-year intervals using a 3D stereophotogrammetric scanner, height and weight were recorded annually, BMI was calculated. Geometric morphometrics (14 fixed landmarks, 400 semi-landmarks) was applied to evaluate facial size. Centroid size (CS) was used as a measure of facial size. Descriptive statistics were used to summarize the sample, Generalized Procrustes analysis with multivariate regression models were employed to analyze the relationship between annual changes in CS (dependent variable) and changes in height, weight, BMI, sex and age (independent variables). The mean annual changes in CS were 35.6 (SD=23.1) and 53.4 (SD=27.9), mean annual height changes were 6.8 cm (SD=1.9) and 7.1 cm (SD=2.7), mean annual weight changes: 4.7 kg (SD=2.8) and 6.8 kg (SD=4.1) and mean annual BMI changes: 0.5 (SD=1) and 1.1 (SD=1.6). Regression models showed that the best predictor of CS change was weight change (R²=0.26, p<0.001), followed by height change (R²=0.15, p<0.001), and BMI change (R²=0.09, p=0.003). Age had no significant effect on CS change, but sex was associated with CS change, with boys showing more CS changes than girls (R²=0.15, p=0.003).</div><div><strong>Conclusions:</strong> Monitoring changes in body weight appears to be a better indicator of facial size changes than tracking height in children.</div></div>","PeriodicalId":43456,"journal":{"name":"Journal of the World Federation of Orthodontists","volume":"14 6","pages":"Page 423"},"PeriodicalIF":3.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145705224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

73 - Development and psychometric properties of the portuguese version of the orofacial appearance perception questionnaire 葡萄牙语版面部外观知觉问卷的发展和心理测量特性

IF 3.2 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of the World Federation of Orthodontists

Pub Date : 2025-12-01 DOI: 10.1016/j.ejwf.2025.07.077

Lucas Arrais De Campos , Lucas Mafra dos Anjos , Juliana Alvares Duarte Bonini Campos

Background

The Orofacial Appearance Perception Questionnaire (OAPQ) is an English-language scale proposed to simultaneously measure self-perception of orofacial appearance and the related psychological constructs of self-esteem, body image, and perfectionism.

Objectives

(i) to translate and culturally adapt the OAPQ to Portuguese and (ii) to estimate its psychometric properties when applied to Brazilian adults.

Methods

The Portuguese version of the OAPQ (OAPQ-Pt) was established through translation, back-translation, and a pilot study. An online cross-sectional study with a non-probabilistic sample was conducted to estimate the psychometric properties of the OAPQ-Pt. Psychometric properties were assessed by factorial validity (confirmatory factor analysis [CFA]), convergent validity (Average Variance Extracted [AVE]), and reliability (omega [ω] and ordinal alpha [α] coefficients).

Results

A total of 710 individuals participated in the study (74.0% female, 23.8% dental patients, mean ± standard deviation of age: 28.5 ± 8.9 years). The OAPQ-Pt presented an adequate fit to the sample data after excluding one item from the "perfectionism" factor (CFA: comparative fit index [CFI] ≥ 0.92, Tucker-Lewis index [TLI] ≥ 0.90, and standardized root mean square residual [SRMR] < 0.08). Convergent validity (AVE ≥ 0.5) and reliability (ω and α ≥ 0.82) were adequate.

Conclusion

The OAPQ-Pt demonstrated adequate psychometric properties when applied to Brazilian adults. Therefore, the data obtained using the OAPQ-Pt are valid and reliable for measuring self-perception of orofacial appearance and related psychological constructs among Brazilian adults.

摘要口腔面部外观知觉问卷（OAPQ）是一种英语量表，旨在同时测量口腔面部外观的自我知觉以及自尊、身体形象和完美主义的相关心理构念。目标(i)将OAPQ翻译成葡萄牙语并进行文化调整；（ii）评估其在巴西成年人身上的心理测量特性。方法通过翻译、反译和初步研究建立葡萄牙语版OAPQ （OAPQ- pt）。采用非概率样本进行在线横断面研究，以估计OAPQ-Pt的心理测量特性。心理测量特性通过因子效度（验证性因子分析[CFA]）、收敛效度（平均方差提取[AVE]）和信度（ω [ω]和序数α [α]系数）进行评估。结果共710人参与研究，其中女性74.0%，牙科患者23.8%，年龄平均±标准差28.5±8.9岁。在排除“完美主义”因素中的一个项目后，OAPQ-Pt与样本数据的拟合程度足够（CFA：比较拟合指数[CFI]≥0.92，Tucker-Lewis指数[TLI]≥0.90，标准化均方根残差[SRMR] <； 0.08）。收敛效度（AVE≥0.5）和信度（ω和α≥0.82）足够。结论OAPQ-Pt在巴西成年人中具有良好的心理测量特性。因此，使用OAPQ-Pt获得的数据对于测量巴西成年人的面部外观和相关心理构形的自我知觉是有效和可靠的。

{"title":"73 - Development and psychometric properties of the portuguese version of the orofacial appearance perception questionnaire","authors":"Lucas Arrais De Campos , Lucas Mafra dos Anjos , Juliana Alvares Duarte Bonini Campos","doi":"10.1016/j.ejwf.2025.07.077","DOIUrl":"10.1016/j.ejwf.2025.07.077","url":null,"abstract":"<div><h3>Background</h3><div>The Orofacial Appearance Perception Questionnaire (OAPQ) is an English-language scale proposed to simultaneously measure self-perception of orofacial appearance and the related psychological constructs of self-esteem, body image, and perfectionism.</div></div><div><h3>Objectives</h3><div>(i) to translate and culturally adapt the OAPQ to Portuguese and (ii) to estimate its psychometric properties when applied to Brazilian adults.</div></div><div><h3>Methods</h3><div>The Portuguese version of the OAPQ (OAPQ-Pt) was established through translation, back-translation, and a pilot study. An online cross-sectional study with a non-probabilistic sample was conducted to estimate the psychometric properties of the OAPQ-Pt. Psychometric properties were assessed by factorial validity (confirmatory factor analysis [CFA]), convergent validity (Average Variance Extracted [AVE]), and reliability (omega [ω] and ordinal alpha [α] coefficients).</div></div><div><h3>Results</h3><div>A total of 710 individuals participated in the study (74.0% female, 23.8% dental patients, mean ± standard deviation of age: 28.5 ± 8.9 years). The OAPQ-Pt presented an adequate fit to the sample data after excluding one item from the \"perfectionism\" factor (CFA: comparative fit index [CFI] ≥ 0.92, Tucker-Lewis index [TLI] ≥ 0.90, and standardized root mean square residual [SRMR] < 0.08). Convergent validity (AVE ≥ 0.5) and reliability (ω and α ≥ 0.82) were adequate.</div></div><div><h3>Conclusion</h3><div>The OAPQ-Pt demonstrated adequate psychometric properties when applied to Brazilian adults. Therefore, the data obtained using the OAPQ-Pt are valid and reliable for measuring self-perception of orofacial appearance and related psychological constructs among Brazilian adults.</div></div>","PeriodicalId":43456,"journal":{"name":"Journal of the World Federation of Orthodontists","volume":"14 6","pages":"Pages 423-424"},"PeriodicalIF":3.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145705225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

2 - 3D evaluation of bone morphology of the infra-zygomatic crest: A retrospective study 颧下嵴骨形态的三维评价：一项回顾性研究

IF 3.2 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of the World Federation of Orthodontists

Pub Date : 2025-12-01 DOI: 10.1016/j.ejwf.2025.07.006

Marta Neves dos Santos , Iman Bugaighis , José Brito , Luís Proença , Pedro Mariano Pereira

There is limited information regarding available bone volume in the sagittal direction of the Infra-Zygomatic Crest (IZC) for a Micro-Implant (MI) safe insertion. To assess the bone available in the sagittal direction when the IZC anterior and posterior walls reach an inclination of 45°. Cone Beam Computed Tomography of 100 patients (60 females and 40 males) were assessed. The IZC curvature was determined 1mm vestibular to the alveolar cortical bone. The site in which the curvature reached 45° was localised. The anteroposterior IZC sagittal measurement at that site was extracted and compared for left/right asymmetry using a paired sample Student’s t-test. Additionally, the measurements were compared as a function of sex and age group (≤21 years vs. >21 years) by using independent samples Student’s t-test. Furthermore, the correlation between those measurements and age and sex was assessed utilizing the Spearman correlation coefficient (rho). All inferential analyses were performed at a 5% significance level (p<0.05). There were no significant differences between paired IZC sagittal measurements (3.6±1.3 mm left side, 3.5±1.5 mm right side) (p=0.144), except for younger individuals (p=0.030). Also, no significant differences were found between males/females (p=0.149 left side, p=0.152 right side). However, a significant difference was identified between the younger age group (3.2 ±1.2 mm) and the older cohort (3.8 ±1.6 mm) for the right IZC sagittal dimension (p=0.038), with an estimated mean difference of 0.03-1.16 mm (95% CI). A significant positive correlation was found between the right IZC sagittal dimension and age (rho=0.201, p=0.045). Sufficient IZC bone volume at an angle of 45° is available for inserting a MI with no sex or side (left/right) variation, except for younger individuals. The right IZC sagittal dimension was found to be age-dependent and significantly higher in older individuals.

关于在颧下嵴（IZC）矢状方向上用于微植入物（MI）安全插入的可用骨体积的信息有限。评估椎体前、后壁倾角为45°时矢状方向可用骨。对100例患者（女性60例，男性40例）进行锥形束计算机断层扫描。在距牙槽皮质骨前庭1mm处测定IZC曲率。曲率达到45°的部位被定位。提取该部位的正后侧IZC矢状测量值，并使用配对样本学生t检验比较左/右不对称。此外，通过使用独立样本学生t检验，将测量值作为性别和年龄组（≤21岁vs. >；21岁）的函数进行比较。此外，利用Spearman相关系数（rho）评估这些测量值与年龄和性别之间的相关性。所有的推理分析均在5%显著性水平下进行（p<0.05）。配对IZC矢状面测量值（左侧3.6±1.3 mm，右侧3.5±1.5 mm）之间无显著差异（p=0.144），除了年轻个体（p=0.030）。此外，男性/女性之间无显著差异（左侧p=0.149，右侧p=0.152）。然而，在年轻组（3.2±1.2 mm）和老年组（3.8±1.6 mm）之间，右IZC矢状面尺寸有显著差异（p=0.038），估计平均差异为0.03-1.16 mm （95% CI）。右侧IZC矢状面尺寸与年龄呈显著正相关（rho=0.201, p=0.045）。除了年轻人外，45°角的足够IZC骨容量可用于插入MI，没有性别或侧面（左/右）变化。发现右IZC矢状面尺寸与年龄有关，并且在老年人中明显更高。

{"title":"2 - 3D evaluation of bone morphology of the infra-zygomatic crest: A retrospective study","authors":"Marta Neves dos Santos , Iman Bugaighis , José Brito , Luís Proença , Pedro Mariano Pereira","doi":"10.1016/j.ejwf.2025.07.006","DOIUrl":"10.1016/j.ejwf.2025.07.006","url":null,"abstract":"<div><div>There is limited information regarding available bone volume in the sagittal direction of the Infra-Zygomatic Crest (IZC) for a Micro-Implant (MI) safe insertion. To assess the bone available in the sagittal direction when the IZC anterior and posterior walls reach an inclination of 45°. Cone Beam Computed Tomography of 100 patients (60 females and 40 males) were assessed. The IZC curvature was determined 1mm vestibular to the alveolar cortical bone. The site in which the curvature reached 45° was localised. The anteroposterior IZC sagittal measurement at that site was extracted and compared for left/right asymmetry using a paired sample Student’s t-test. Additionally, the measurements were compared as a function of sex and age group (≤21 years vs. >21 years) by using independent samples Student’s t-test. Furthermore, the correlation between those measurements and age and sex was assessed utilizing the Spearman correlation coefficient (rho). All inferential analyses were performed at a 5% significance level (p<0.05). There were no significant differences between paired IZC sagittal measurements (3.6±1.3 mm left side, 3.5±1.5 mm right side) (p=0.144), except for younger individuals (p=0.030). Also, no significant differences were found between males/females (p=0.149 left side, p=0.152 right side). However, a significant difference was identified between the younger age group (3.2 ±1.2 mm) and the older cohort (3.8 ±1.6 mm) for the right IZC sagittal dimension (p=0.038), with an estimated mean difference of 0.03-1.16 mm (95% CI). A significant positive correlation was found between the right IZC sagittal dimension and age (rho=0.201, p=0.045). Sufficient IZC bone volume at an angle of 45° is available for inserting a MI with no sex or side (left/right) variation, except for younger individuals. The right IZC sagittal dimension was found to be age-dependent and significantly higher in older individuals.</div></div>","PeriodicalId":43456,"journal":{"name":"Journal of the World Federation of Orthodontists","volume":"14 6","pages":"Page 397"},"PeriodicalIF":3.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145705255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

34 - Assessment of the skin facial profile: Comparison between a public jury and a professional jury 皮肤面部轮廓的评估：公众陪审团与专业陪审团的比较

IF 3.2 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of the World Federation of Orthodontists

Pub Date : 2025-12-01 DOI: 10.1016/j.ejwf.2025.07.038

Amine Majid , Sair Salma , Ousehal Lahcen

Facial aesthetics can play an important role in interpersonal relationships, social inclusion and self-esteem.In terms of facial profile, jaw position and incisor inclination play an important role in facial aesthetics and offer relevant information for treatment planning. Orthodontic treatment needs to take these features on board, particularly in areas racial diversity.

Objectives: - Determine the facial profile the most and least appreciated by a Moroccan population. - To evaluate and compare the perception of Moroccan dentists and members of the public with regard to different facial profiles.

Methods: An initial photographic image of a facial profile of a Brazilian brunette woman was modified with respect to the Ricketts E-line, producing labial positions of -4mm, -2mm, 0mm, +2mm, +4mm, +6mm, and +8mm. The 7 digital photographs were printed and randomly arranged in an album and then presented to a sample of 51 dentists (Orthodontists, Prosthodontists and Periodontists) and 60 members of the public. Assessments were made using a visual analog scale.

Results: - Flat and slightly concave profiles were voted most pleasing by the two juries. - When the profile was very convex, the two juries agreed that it was unattractive. - The Moroccan public jury is more generous in its ratings than the professional jury. - Skin color can influence the perception of facial profile.

Conclusion: The differences between public and professional perceptions of facial profiles should be considered when performing aesthetic treatments. Clinicians must be careful not to impose their own standards of beauty on patients and should take individual preferences and cultural perspectives into account.

面部美学在人际关系、社会包容和自尊方面发挥着重要作用。在面部轮廓方面，下颌位置和门牙倾斜度在面部美学中起着重要作用，并为治疗计划提供相关信息。正畸治疗需要考虑到这些特征，特别是在种族多样化的地区。目标：-确定摩洛哥人最喜欢和最不喜欢的面部轮廓。-评价和比较摩洛哥牙医和公众对不同面部轮廓的看法。方法：根据Ricketts e线对一名巴西黑发女性面部轮廓的初始摄影图像进行修改，产生-4mm， -2mm, 0mm, +2mm, +4mm， +6mm和+8mm的唇部位置。这7张数码照片被打印并随机排列在一个相册中，然后向51名牙医（正畸医生、修复医生和牙周病医生）和60名公众提供样本。使用视觉模拟量表进行评估。结果：-平坦和微凹的轮廓被两个评审团评为最令人满意的。-当轮廓非常凸出时，两个陪审团一致认为它没有吸引力。-摩洛哥公众陪审团的评分比专业陪审团更慷慨。肤色可以影响对面部轮廓的感知。结论：在进行美容治疗时，应考虑公众和专业人士对面部轮廓的认知差异。临床医生必须小心，不要把自己的审美标准强加给病人，应该考虑到个人偏好和文化观点。

{"title":"34 - Assessment of the skin facial profile: Comparison between a public jury and a professional jury","authors":"Amine Majid , Sair Salma , Ousehal Lahcen","doi":"10.1016/j.ejwf.2025.07.038","DOIUrl":"10.1016/j.ejwf.2025.07.038","url":null,"abstract":"<div><div>Facial aesthetics can play an important role in interpersonal relationships, social inclusion and self-esteem.In terms of facial profile, jaw position and incisor inclination play an important role in facial aesthetics and offer relevant information for treatment planning. Orthodontic treatment needs to take these features on board, particularly in areas racial diversity.</div><div><strong>Objectives:</strong> - Determine the facial profile the most and least appreciated by a Moroccan population. - To evaluate and compare the perception of Moroccan dentists and members of the public with regard to different facial profiles.</div><div><strong>Methods:</strong> An initial photographic image of a facial profile of a Brazilian brunette woman was modified with respect to the Ricketts E-line, producing labial positions of -4mm, -2mm, 0mm, +2mm, +4mm, +6mm, and +8mm. The 7 digital photographs were printed and randomly arranged in an album and then presented to a sample of 51 dentists (Orthodontists, Prosthodontists and Periodontists) and 60 members of the public. Assessments were made using a visual analog scale.</div><div><strong>Results:</strong> - Flat and slightly concave profiles were voted most pleasing by the two juries. - When the profile was very convex, the two juries agreed that it was unattractive. - The Moroccan public jury is more generous in its ratings than the professional jury. - Skin color can influence the perception of facial profile.</div><div><strong>Conclusion:</strong> The differences between public and professional perceptions of facial profiles should be considered when performing aesthetic treatments. Clinicians must be careful not to impose their own standards of beauty on patients and should take individual preferences and cultural perspectives into account.</div></div>","PeriodicalId":43456,"journal":{"name":"Journal of the World Federation of Orthodontists","volume":"14 6","pages":"Page 410"},"PeriodicalIF":3.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145705257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

56 - Comparison of the smile attractiveness of Class II patients treated with the Twin Force appliance and Orthognatic Surgery 56 -双力矫治器与正颌手术治疗II类患者微笑吸引力的比较

IF 3.2 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of the World Federation of Orthodontists

Pub Date : 2025-12-01 DOI: 10.1016/j.ejwf.2025.07.060

Kelli Zeferino Correia Bauermann , Jaíne Larissa Codato Serigioli , Célia Regina Maio Pinzan-Vercelino , Paula Cotrin , Fabrício Pinelli Valarelli , Karina Maria Salvatore de Freitas

Facial aesthetics, especially the smile, greatly influence attractiveness and social interactions, being a factor increasingly valued in contemporary society.

Objective

This study aimed to compare the attractiveness of the smile in Class II patients treated with a Twin Force Bite Corrector appliance or surgically. Material and

Methods

The sample consisted of smile photographs of 30 patients before and after treatment. All had Class II malocclusion, treated without extraction, divided into two groups based on the treatment. Group 1 (TFBC) had 15 patients (10 men, 5 women, mean starting age 19.55 years), with a treatment time of 2.58 years. Group 2 (Surgical) had 15 patients (6 men, 9 women, mean starting age 20.14 years), with a treatment time of 2.36 years. Photos were standardized, placed on a black-and-white scale, and evaluated via Google Forms by laypeople, dentists, and orthodontists, rating smile attractiveness from 0 to 10. Inter-group comparisons used the independent t-test.

Results

Both groups showed significant improvements in smile attractiveness, but the surgical group had greater final scores. Orthodontists gave higher ratings than laypeople and dentists.

Conclusion

The improvement in smile attractiveness was similar in both groups, but patients treated surgically had greater smile attractiveness at the end of treatment.

面部美学，尤其是微笑，极大地影响着吸引力和社会交往，是当代社会越来越重视的一个因素。目的比较双牙合矫正器与手术治疗II类患者的微笑吸引力。材料与方法样本为30例患者治疗前后的微笑照片。所有患者均为II类错牙合，不拔除治疗，根据治疗情况分为两组。组1 (TFBC) 15例，男10例，女5例，平均起始年龄19.55岁，治疗时间2.58年。手术组15例，男6例，女9例，平均起始年龄20.14岁，治疗时间2.36年。照片被标准化，放在黑白尺度上，并由外行人、牙医和正畸医生通过谷歌表格进行评估，将微笑的吸引力从0到10打分。组间比较采用独立t检验。结果两组患者在微笑吸引力方面都有显著提高，但手术组的最终得分更高。正畸医生的评分高于门外汉和牙医。结论两组患者微笑吸引力的改善相似，但手术治疗患者在治疗结束时的微笑吸引力更大。

{"title":"56 - Comparison of the smile attractiveness of Class II patients treated with the Twin Force appliance and Orthognatic Surgery","authors":"Kelli Zeferino Correia Bauermann , Jaíne Larissa Codato Serigioli , Célia Regina Maio Pinzan-Vercelino , Paula Cotrin , Fabrício Pinelli Valarelli , Karina Maria Salvatore de Freitas","doi":"10.1016/j.ejwf.2025.07.060","DOIUrl":"10.1016/j.ejwf.2025.07.060","url":null,"abstract":"<div><div>Facial aesthetics, especially the smile, greatly influence attractiveness and social interactions, being a factor increasingly valued in contemporary society.</div></div><div><h3>Objective</h3><div>This study aimed to compare the attractiveness of the smile in Class II patients treated with a Twin Force Bite Corrector appliance or surgically. Material and</div></div><div><h3>Methods</h3><div>The sample consisted of smile photographs of 30 patients before and after treatment. All had Class II malocclusion, treated without extraction, divided into two groups based on the treatment. Group 1 (TFBC) had 15 patients (10 men, 5 women, mean starting age 19.55 years), with a treatment time of 2.58 years. Group 2 (Surgical) had 15 patients (6 men, 9 women, mean starting age 20.14 years), with a treatment time of 2.36 years. Photos were standardized, placed on a black-and-white scale, and evaluated via Google Forms by laypeople, dentists, and orthodontists, rating smile attractiveness from 0 to 10. Inter-group comparisons used the independent t-test.</div></div><div><h3>Results</h3><div>Both groups showed significant improvements in smile attractiveness, but the surgical group had greater final scores. Orthodontists gave higher ratings than laypeople and dentists.</div></div><div><h3>Conclusion</h3><div>The improvement in smile attractiveness was similar in both groups, but patients treated surgically had greater smile attractiveness at the end of treatment.</div></div>","PeriodicalId":43456,"journal":{"name":"Journal of the World Federation of Orthodontists","volume":"14 6","pages":"Pages 417-418"},"PeriodicalIF":3.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145705378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

23 - Antibiotic prophylaxis for the prevention of fistulae in cleft palate repair 抗生素预防腭裂修复术后瘘的发生

IF 3.2 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of the World Federation of Orthodontists

Pub Date : 2025-12-01 DOI: 10.1016/j.ejwf.2025.07.027

Suhavi Singh , Nitisha Narayan , Alistair Cobb , Neil McLean , David David , Shaheel Chummun

Postoperative infection following cleft palate repair can result in wound breakdown and oronasal fistula formation, leading to complications such as impaired speech development, regurgitation, and scarring, which may restrict maxillary growth. Symptomatic fistulae often necessitate further surgeries, impacting psychosocial development through missed school and social disruption. Despite this, there is limited evidence supporting the use of postoperative antibiotics to prevent infection or fistula formation, and no consensus exists among cleft surgeons. This study aimed to evaluate fistula rates and the effect of postoperative antibiotic regimens in primary cleft palatoplasty. A retrospective quality improvement study was conducted on 97 consecutive patients undergoing cleft palate repair between August 2020 and August 2022. Data included demographics, cleft type (Veau classification), antibiotic regimen, and fistula presence at three-month follow-up. Two surgeons, both using the Sommerlad intravelar veloplasty technique, employed differing antibiotic protocols: Surgeon A administered intravenous (IV) antibiotics on induction with either two additional IV doses (Cycle 1) or no further antibiotics (Cycle 2), while Surgeon B added a seven-day course of oral antibiotics post-discharge. Fistula rates were 11.3% in Cycle 1 and 5.8% in Cycle 2, with no significant differences between regimens in either cycle (Cycle 1: χ² = 0.0255, p = 0.8730; Cycle 2: χ² = 0.021, p = 0.8848). These findings suggest extended antibiotic use does not significantly reduce fistula formation and underscore the importance of promoting antibiotic stewardship. Although limited by sample size, this study highlights the need for a UK-wide randomised controlled trial to establish evidence-based guidelines and standardise postoperative care.

腭裂修复术后感染可导致伤口破裂和口鼻瘘形成，导致语言发育障碍、反流和瘢痕形成等并发症，这可能限制上颌生长。有症状的瘘管往往需要进一步的手术，通过失学和社会破坏影响心理社会发展。尽管如此，支持术后使用抗生素预防感染或瘘管形成的证据有限，腭裂外科医生也没有达成共识。本研究旨在评估腭裂成形术中瘘发生率和术后抗生素治疗方案的效果。对2020年8月至2022年8月连续97例腭裂修复患者进行回顾性质量改善研究。数据包括人口统计学、唇裂类型（Veau分类）、抗生素治疗方案和三个月随访时的瘘管存在情况。两位外科医生都使用了Sommerlad行内速度成形术，采用了不同的抗生素方案：A外科医生在诱导时静脉注射抗生素，并添加两个额外的静脉剂量（第1周期）或不再使用抗生素（第2周期），而B外科医生在出院后增加了一个7天的口服抗生素疗程。第1周期的瘘管率为11.3%，第2周期的瘘管率为5.8%，两个周期的方案之间无显著差异（第1周期：χ² = 0.0255,p = 0.8730；第2周期：χ² = 0.021,p = 0.8848）。这些发现表明，延长抗生素的使用并不能显著减少瘘的形成，并强调了促进抗生素管理的重要性。尽管样本量有限，但本研究强调需要在英国范围内进行随机对照试验，以建立循证指南和标准化术后护理。

{"title":"23 - Antibiotic prophylaxis for the prevention of fistulae in cleft palate repair","authors":"Suhavi Singh , Nitisha Narayan , Alistair Cobb , Neil McLean , David David , Shaheel Chummun","doi":"10.1016/j.ejwf.2025.07.027","DOIUrl":"10.1016/j.ejwf.2025.07.027","url":null,"abstract":"<div><div>Postoperative infection following cleft palate repair can result in wound breakdown and oronasal fistula formation, leading to complications such as impaired speech development, regurgitation, and scarring, which may restrict maxillary growth. Symptomatic fistulae often necessitate further surgeries, impacting psychosocial development through missed school and social disruption. Despite this, there is limited evidence supporting the use of postoperative antibiotics to prevent infection or fistula formation, and no consensus exists among cleft surgeons. This study aimed to evaluate fistula rates and the effect of postoperative antibiotic regimens in primary cleft palatoplasty. A retrospective quality improvement study was conducted on 97 consecutive patients undergoing cleft palate repair between August 2020 and August 2022. Data included demographics, cleft type (Veau classification), antibiotic regimen, and fistula presence at three-month follow-up. Two surgeons, both using the Sommerlad intravelar veloplasty technique, employed differing antibiotic protocols: Surgeon A administered intravenous (IV) antibiotics on induction with either two additional IV doses (Cycle 1) or no further antibiotics (Cycle 2), while Surgeon B added a seven-day course of oral antibiotics post-discharge. Fistula rates were 11.3% in Cycle 1 and 5.8% in Cycle 2, with no significant differences between regimens in either cycle (Cycle 1: χ² = 0.0255, p = 0.8730; Cycle 2: χ² = 0.021, p = 0.8848). These findings suggest extended antibiotic use does not significantly reduce fistula formation and underscore the importance of promoting antibiotic stewardship. Although limited by sample size, this study highlights the need for a UK-wide randomised controlled trial to establish evidence-based guidelines and standardise postoperative care.</div></div>","PeriodicalId":43456,"journal":{"name":"Journal of the World Federation of Orthodontists","volume":"14 6","pages":"Page 405"},"PeriodicalIF":3.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145705653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

35 - Association between single nucleotide polymorphisms in vitamin D-related and Parathyroid Hormone Gene with non-syndromic oral cleft 维生素d相关基因和甲状旁腺激素基因单核苷酸多态性与非综合征性唇裂的关系

IF 3.2 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of the World Federation of Orthodontists

Pub Date : 2025-12-01 DOI: 10.1016/j.ejwf.2025.07.039

Jana Marciniak , Gabriela Fonseca-Souza , Rafaela Scariot , Juliana Feltrin-Souza , Christian Kirschneck , Erika Calvano Küchler

Non-syndromic oral clefts (NSOC) result from disruptions in the development of the primary and secondary palate and are categorized into cleft lip (CL), cleft lip and palate (CLP), and cleft palate (CP). NSOC is a condition with complex genetically heterogeneous backgrounds for that several genes might be involved. Therefore this cross-sectional study aimed to investigate the association between NSOC and functional single nucleotide polymorphisms (SNPs) in genes that potentially influence the vitamin D levels and PTH levels. Brazilian individuals with NSOC – presenting cleft lip (CL), cleft lip and palate (CLP) and cleft palate (CP) – and a comparison group of children without NSOC were selected. The DNA of all individuals was obtained from epithelial cells of the oral mucosa. Ten SNPs in six genes (VDR, CYP27B1, CYP24A1, SEC23A, CALCR and PTH) were selected. Genotyping was performed by real-time PCR. The association between NSCL/P and vitamin D-related polymorphisms was analysed by Chi-square test at a significance level of 5%. The sample consisted of 274 individuals with 154 NSOC individuals and 120 controls. The most frequent cleft type in the NSOC group was CLP (n=91; 59.1%), followed by CL (n=43; 27.9%) and CP (n=20; 13.0%). A statistical significance was observed for the rs694 for NSOC (p = 0.0243) and for the CL (p = 0.0302) compared to the control. In conclusion, the SNP rs694 in the gene encoding parathyroid hormone was associated with non-syndromic oral cleft for that the CC genotype could be a protective factor.

非综合征性唇腭裂（NSOC）是由原发性和继发性腭裂发育中断引起的，分为唇裂（CL）、唇腭裂（CLP）和腭裂（CP）。NSOC是一种具有复杂遗传异质性背景的疾病，可能涉及多个基因。因此，本横断面研究旨在探讨NSOC与可能影响维生素D水平和甲状旁腺激素水平的基因的功能单核苷酸多态性（snp）之间的关系。巴西的NSOC患者（表现为唇裂（CL）、唇腭裂（CLP）和腭裂（CP））和非NSOC儿童的对照组被选中。所有个体的DNA均取自口腔黏膜上皮细胞。选择了VDR、CYP27B1、CYP24A1、SEC23A、CALCR和PTH 6个基因的10个snp。采用实时荧光定量PCR进行基因分型。采用卡方检验分析NSCL/P与维生素d相关多态性的相关性，显著性水平为5%。样本包括274名个体，154名NSOC个体和120名对照。NSOC组最常见的唇裂类型为CLP (n=91, 59.1%)，其次为CL （n=43, 27.9%）和CP （n=20, 13.0%）。与对照组相比，rs694对NSOC （p = 0.0243）和CL （p = 0.0302）有统计学意义。综上所述，甲状旁腺激素编码基因SNP rs694与非综合征性唇裂相关，CC基因型可能是一个保护因素。

{"title":"35 - Association between single nucleotide polymorphisms in vitamin D-related and Parathyroid Hormone Gene with non-syndromic oral cleft","authors":"Jana Marciniak , Gabriela Fonseca-Souza , Rafaela Scariot , Juliana Feltrin-Souza , Christian Kirschneck , Erika Calvano Küchler","doi":"10.1016/j.ejwf.2025.07.039","DOIUrl":"10.1016/j.ejwf.2025.07.039","url":null,"abstract":"<div><div>Non-syndromic oral clefts (NSOC) result from disruptions in the development of the primary and secondary palate and are categorized into cleft lip (CL), cleft lip and palate (CLP), and cleft palate (CP). NSOC is a condition with complex genetically heterogeneous backgrounds for that several genes might be involved. Therefore this cross-sectional study aimed to investigate the association between NSOC and functional single nucleotide polymorphisms (SNPs) in genes that potentially influence the vitamin D levels and PTH levels. Brazilian individuals with NSOC – presenting cleft lip (CL), cleft lip and palate (CLP) and cleft palate (CP) – and a comparison group of children without NSOC were selected. The DNA of all individuals was obtained from epithelial cells of the oral mucosa. Ten SNPs in six genes (VDR, CYP27B1, CYP24A1, SEC23A, CALCR and PTH) were selected. Genotyping was performed by real-time PCR. The association between NSCL/P and vitamin D-related polymorphisms was analysed by Chi-square test at a significance level of 5%. The sample consisted of 274 individuals with 154 NSOC individuals and 120 controls. The most frequent cleft type in the NSOC group was CLP (n=91; 59.1%), followed by CL (n=43; 27.9%) and CP (n=20; 13.0%). A statistical significance was observed for the rs694 for NSOC (p = 0.0243) and for the CL (p = 0.0302) compared to the control. In conclusion, the SNP rs694 in the gene encoding parathyroid hormone was associated with non-syndromic oral cleft for that the CC genotype could be a protective factor.</div></div>","PeriodicalId":43456,"journal":{"name":"Journal of the World Federation of Orthodontists","volume":"14 6","pages":"Page 410"},"PeriodicalIF":3.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145705658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

27 - Artificial intelligence in growth potential assessment: A predictable future in orthodontics 人工智能在增长潜力评估中的应用：正畸学的可预测未来

IF 3.2 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of the World Federation of Orthodontists

Pub Date : 2025-12-01 DOI: 10.1016/j.ejwf.2025.07.031

Soukaina El Baz , Soukaina Sahim , Zineb Saffi Eddine , Farid Bourzghi , Farid Elquars

Background

The assessment of growth potential is vital in orthodontic diagnosis, particularly in growing patients. Traditionally, this relies on skeletal maturation indicators like hand-wrist radiographs, cervical vertebral maturation (CVM) analysis, and dental development stages. However, these methods are subjective and subject to interobserver variability. Artificial intelligence (AI), especially deep learning and machine learning algorithms, offers a promising tool for improving growth prediction accuracy and optimizing orthodontic decision-making.

Objectives

This study aims to evaluate the predictive accuracy of AI models in determining skeletal growth potential by comparing their performance with traditional methods such as CVM analysis and hand-wrist radiographs.

Methods

An electronic search was conducted across PubMed, Cochrane, ScienceDirect, Springer, and Google Scholar for articles published between 2015 and 2025. Studies using AI models to predict skeletal growth were included, while those without comparative evaluations to traditional methods were excluded. The analysis focused on accuracy, sensitivity, specificity, and agreement with expert assessments.

Results

AI models have demonstrated high accuracy, exceeding 85%, in predicting skeletal maturation stages. The application of convolutional neural networks (CNNs) to lateral cephalometric and hand-wrist radiographs outperforms conventional methods based on CVM classification. AI reduces interobserver variability, improving diagnostic reproducibility and efficiency. In hand-wrist radiograph analysis, AI improves assessment accuracy and saves time. Regarding cervical vertebral maturation, the artificial neural network (ANN) model performed comparably, or even superior, to human observers. However, prediction reliability depends on the quality of databases and algorithmic choices.

Conclusions

AI is a promising tool for predicting skeletal growth potential with high accuracy and reproducibility. Integrating AI into orthodontic diagnostics could enhance decision-making and treatment planning. Further studies with standardized datasets and validation across diverse populations are necessary to optimize AI performance and clinical applicability.

生长潜力评估在正畸诊断中是至关重要的，特别是在生长患者中。传统上，这依赖于骨骼成熟指标，如手腕x线片，颈椎成熟（CVM）分析和牙齿发育阶段。然而，这些方法是主观的，受观察者之间差异的影响。人工智能（AI），特别是深度学习和机器学习算法，为提高生长预测准确性和优化正畸决策提供了一个很有前途的工具。本研究旨在通过将人工智能模型与传统方法（如CVM分析和手腕x线片）的性能进行比较，评估人工智能模型在确定骨骼生长潜力方面的预测准确性。方法在PubMed、Cochrane、ScienceDirect、b施普林格和谷歌Scholar上检索2015 - 2025年间发表的文章。使用人工智能模型预测骨骼生长的研究被包括在内，而没有与传统方法进行比较评估的研究被排除在外。分析的重点是准确性、敏感性、特异性以及与专家评估的一致性。结果该模型预测骨骼成熟阶段的准确率高达85%以上。卷积神经网络（cnn）在侧位头位和腕位x线片上的应用优于基于CVM分类的传统方法。人工智能减少了观察者之间的差异，提高了诊断的可重复性和效率。在手腕x线片分析中，AI提高了评估准确性，节省了时间。关于颈椎成熟，人工神经网络（ANN）模型的表现与人类观察者相当，甚至优于人类观察者。然而，预测的可靠性取决于数据库的质量和算法的选择。结论sai预测骨骼生长势具有较高的准确性和重复性。将人工智能集成到正畸诊断中，可以提高决策和治疗计划。有必要进一步研究标准化数据集，并在不同人群中进行验证，以优化人工智能的性能和临床适用性。

{"title":"27 - Artificial intelligence in growth potential assessment: A predictable future in orthodontics","authors":"Soukaina El Baz , Soukaina Sahim , Zineb Saffi Eddine , Farid Bourzghi , Farid Elquars","doi":"10.1016/j.ejwf.2025.07.031","DOIUrl":"10.1016/j.ejwf.2025.07.031","url":null,"abstract":"<div><h3>Background</h3><div>The assessment of growth potential is vital in orthodontic diagnosis, particularly in growing patients. Traditionally, this relies on skeletal maturation indicators like hand-wrist radiographs, cervical vertebral maturation (CVM) analysis, and dental development stages. However, these methods are subjective and subject to interobserver variability. Artificial intelligence (AI), especially deep learning and machine learning algorithms, offers a promising tool for improving growth prediction accuracy and optimizing orthodontic decision-making.</div></div><div><h3>Objectives</h3><div>This study aims to evaluate the predictive accuracy of AI models in determining skeletal growth potential by comparing their performance with traditional methods such as CVM analysis and hand-wrist radiographs.</div></div><div><h3>Methods</h3><div>An electronic search was conducted across PubMed, Cochrane, ScienceDirect, Springer, and Google Scholar for articles published between 2015 and 2025. Studies using AI models to predict skeletal growth were included, while those without comparative evaluations to traditional methods were excluded. The analysis focused on accuracy, sensitivity, specificity, and agreement with expert assessments.</div></div><div><h3>Results</h3><div>AI models have demonstrated high accuracy, exceeding 85%, in predicting skeletal maturation stages. The application of convolutional neural networks (CNNs) to lateral cephalometric and hand-wrist radiographs outperforms conventional methods based on CVM classification. AI reduces interobserver variability, improving diagnostic reproducibility and efficiency. In hand-wrist radiograph analysis, AI improves assessment accuracy and saves time. Regarding cervical vertebral maturation, the artificial neural network (ANN) model performed comparably, or even superior, to human observers. However, prediction reliability depends on the quality of databases and algorithmic choices.</div></div><div><h3>Conclusions</h3><div>AI is a promising tool for predicting skeletal growth potential with high accuracy and reproducibility. Integrating AI into orthodontic diagnostics could enhance decision-making and treatment planning. Further studies with standardized datasets and validation across diverse populations are necessary to optimize AI performance and clinical applicability.</div></div>","PeriodicalId":43456,"journal":{"name":"Journal of the World Federation of Orthodontists","volume":"14 6","pages":"Pages 406-407"},"PeriodicalIF":3.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145705659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

91 - Effects of surface wear of attachments on maxillary canine rotation with clear aligners 附着物表面磨损对使用透明矫正器的上颌犬齿旋转的影响

IF 3.2 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of the World Federation of Orthodontists

Pub Date : 2025-12-01 DOI: 10.1016/j.ejwf.2025.07.095

Qiuying Li , Kai Yang

Background

Attachments serve as crucial auxiliary devices in clear aligner therapy. Surface wear of attachments may affect the anchorage control and the treatment outcome. The effects of attachment wear on tooth movements are still unclear.

Objectives

This study aimed to explore the effects of surface wear of attachments on maxillary canine rotation with clear aligners through finite element analysis.

Methods

Finite element models of maxillary canine rotation with clear aligners were constructed. Two groups of attachments (vertical rectangular attachment and optimized rotating attachment) and five working conditions representing different degrees of attachment wear (M0, M2, M4, M6, M8) were designed for canine rotation. The rotation degree of canine and equivalent stress in the periodontal ligament were analyzed.

Results

By M8, the rotation degree of the canine, the equivalent stress values in the periodontal ligaments in the rectangular attachment group decreased by 32.35%, 68.20%, respectively, compared to M0. In the optimized rotating attachment group, these values decreased by 18.62%, 31.30%, respectively. The greatest reduction in canine rotation degree and stress values was observed between M2-M4 in the rectangular attachment group, and the rotation efficiency of canine decreased to less than 50% from M4. In the optimized rotating attachment group, the canine rotation degree and stress values decreased most in M6-M8, and the efficiency of canine rotation decreased to less than 50% at M8.

Conclusions

Attachment wear led to a reduction in the efficiency of canine rotation. Considering the effect of attachment wear, the optimized rotating attachment is recommended for canine rotation. Once optimized rotating attachments have been in place for more than 6 months and maxillary canine rotation is still required, orthodontists should monitor the wear of these attachments. If necessary, timely restoration or rebonding of the attachments is recommended.

背景：在透明矫正器治疗中，附着体是至关重要的辅助装置。附着体表面磨损会影响锚定控制和治疗效果。附着体磨损对牙齿运动的影响尚不清楚。目的通过有限元分析，探讨附着体表面磨损对牙体旋转的影响。方法建立上颌尖牙旋转的有限元模型。设计了两组附件（垂直矩形附件和优化旋转附件）和代表不同磨损程度的5种工况（M0、M2、M4、M6、M8）进行犬齿旋转。分析了犬的旋转程度和牙周韧带的等效应力。结果M8时，与M0相比，矩形附着体组牙周韧带等效应力值分别下降32.35%、68.20%。在优化后的旋转附着组中，这些数值分别下降了18.62%、31.30%。矩形附着体组在M2-M4之间犬齿的旋转度和应力值降低最大，犬齿的旋转效率从M4下降到50%以下。在优化后的旋转附着组中，犬齿旋转度和应力值在M6-M8时下降最多，犬齿旋转效率在M8时下降到50%以下。结论附着体磨损导致牙体旋转效率降低。考虑到附件磨损的影响，建议采用优化后的旋转附件进行犬齿旋转。一旦优化的旋转附着体放置超过6个月，仍然需要上颌犬旋转，正畸医生应该监测这些附着体的磨损情况。如有必要，建议及时修复或重新绑定附件。

{"title":"91 - Effects of surface wear of attachments on maxillary canine rotation with clear aligners","authors":"Qiuying Li , Kai Yang","doi":"10.1016/j.ejwf.2025.07.095","DOIUrl":"10.1016/j.ejwf.2025.07.095","url":null,"abstract":"<div><h3>Background</h3><div>Attachments serve as crucial auxiliary devices in clear aligner therapy. Surface wear of attachments may affect the anchorage control and the treatment outcome. The effects of attachment wear on tooth movements are still unclear.</div></div><div><h3>Objectives</h3><div>This study aimed to explore the effects of surface wear of attachments on maxillary canine rotation with clear aligners through finite element analysis.</div></div><div><h3>Methods</h3><div>Finite element models of maxillary canine rotation with clear aligners were constructed. Two groups of attachments (vertical rectangular attachment and optimized rotating attachment) and five working conditions representing different degrees of attachment wear (M0, M2, M4, M6, M8) were designed for canine rotation. The rotation degree of canine and equivalent stress in the periodontal ligament were analyzed.</div></div><div><h3>Results</h3><div>By M8, the rotation degree of the canine, the equivalent stress values in the periodontal ligaments in the rectangular attachment group decreased by 32.35%, 68.20%, respectively, compared to M0. In the optimized rotating attachment group, these values decreased by 18.62%, 31.30%, respectively. The greatest reduction in canine rotation degree and stress values was observed between M2-M4 in the rectangular attachment group, and the rotation efficiency of canine decreased to less than 50% from M4. In the optimized rotating attachment group, the canine rotation degree and stress values decreased most in M6-M8, and the efficiency of canine rotation decreased to less than 50% at M8.</div></div><div><h3>Conclusions</h3><div>Attachment wear led to a reduction in the efficiency of canine rotation. Considering the effect of attachment wear, the optimized rotating attachment is recommended for canine rotation. Once optimized rotating attachments have been in place for more than 6 months and maxillary canine rotation is still required, orthodontists should monitor the wear of these attachments. If necessary, timely restoration or rebonding of the attachments is recommended.</div></div>","PeriodicalId":43456,"journal":{"name":"Journal of the World Federation of Orthodontists","volume":"14 6","pages":"Pages 429-430"},"PeriodicalIF":3.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145705716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Palatal versus buccal protraction using plates assisted with facemask in growing Class III patients: A randomized clinical trial 在生长中的III类患者中，使用板辅助面罩进行腭与颊前伸：一项随机临床试验。

IF 3.2 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of the World Federation of Orthodontists

Pub Date : 2025-12-01 DOI: 10.1016/j.ejwf.2025.06.004

Mohamed Adel Raghib , Mohamed Abdallah Elsaharty , Mohammad H. Mohammad , Marwa Shamaa , Ahmed A. El-Bialy

Background

This study aimed to compare palatal versus buccal protraction using plates assisted with a facemask in growing Class III patients.

Methods

Twenty growing Class III patients were randomly allocated into two main groups. In Group 1, a surgical mini-plate was bent into a semicircular shape and adapted to the patient’s model to extend from the canine area on one side to the contralateral canine area. The adapted mini-plate was placed on the palate immediately posterior to the palatal rugae. Four self-drilling surgical mini-screws were installed with an angulation of 60°–70° to the long axis of the teeth. In Group 2, a surgical mini-plate was bent and placed in the zygomatic buttress area, according to the anatomy of the region, and fixed with screws. The end of the mini-plate was exposed over the keratinized attached gingiva near the canine, and the end holes were modified to create a hook for elastics. Mucoperiosteal flaps were repositioned and sutured. For both groups, pretreatment and post-treatment cephalometric radiographs were analyzed to evaluate maxillary protraction and dentoskeletal changes.

Results

A statistically significant difference was found when comparing treatment periods in both groups, with Group 1 showing a shorter treatment duration (P < 0.05). Comparison of cephalometric measurements between pre- and post-treatment revealed statistically significant differences in both angular and linear dimensions (P < 0.05).

Conclusions

Both skeletal anchorage protocols for maxillary protraction effectively resolved the severe maxillary deficiency in growing Class III patients.

背景：本研究旨在比较在生长中的III类患者中使用板辅助面罩的腭和颊牵引。方法：20例生长期III级患者随机分为两组。在第1组中，外科迷你钢板弯曲成半圆形，并适应患者的模型，从一侧的犬区延伸到对侧的犬区。适应后的迷你板被放置在腭褶后的腭上。安装4颗自钻孔外科微型螺钉，与牙齿长轴成60°-70°角。在第2组中，根据颧支撑区域的解剖结构，将外科微型钢板弯曲并放置在颧支撑区域，并用螺钉固定。迷你板的末端暴露在靠近犬齿的角化附著牙龈上，并修改末端孔以创建弹性钩。粘骨膜瓣重新定位并缝合。对两组患者进行治疗前和治疗后的头颅x线片分析，以评估上颌前伸和牙骨骼的变化。结果：两组治疗时间比较，差异有统计学意义，其中1组治疗时间更短(p)结论：两种上颌牵引骨支抗方案均能有效解决生长期III类患者上颌严重缺陷。

{"title":"Palatal versus buccal protraction using plates assisted with facemask in growing Class III patients: A randomized clinical trial","authors":"Mohamed Adel Raghib , Mohamed Abdallah Elsaharty , Mohammad H. Mohammad , Marwa Shamaa , Ahmed A. El-Bialy","doi":"10.1016/j.ejwf.2025.06.004","DOIUrl":"10.1016/j.ejwf.2025.06.004","url":null,"abstract":"<div><h3>Background</h3><div>This study aimed to compare palatal versus buccal protraction using plates assisted with a facemask in growing Class III patients.</div></div><div><h3>Methods</h3><div>Twenty growing Class III patients were randomly allocated into two main groups. In Group 1, a surgical mini-plate was bent into a semicircular shape and adapted to the patient’s model to extend from the canine area on one side to the contralateral canine area. The adapted mini-plate was placed on the palate immediately posterior to the palatal rugae. Four self-drilling surgical mini-screws were installed with an angulation of 60°–70° to the long axis of the teeth. In Group 2, a surgical mini-plate was bent and placed in the zygomatic buttress area, according to the anatomy of the region, and fixed with screws. The end of the mini-plate was exposed over the keratinized attached gingiva near the canine, and the end holes were modified to create a hook for elastics. Mucoperiosteal flaps were repositioned and sutured. For both groups, pretreatment and post-treatment cephalometric radiographs were analyzed to evaluate maxillary protraction and dentoskeletal changes.</div></div><div><h3>Results</h3><div>A statistically significant difference was found when comparing treatment periods in both groups, with Group 1 showing a shorter treatment duration (<em>P</em> <em><</em> <em>0.05</em>). Comparison of cephalometric measurements between pre- and post-treatment revealed statistically significant differences in both angular and linear dimensions (<em>P</em> <em><</em> <em>0.05</em>)<em>.</em></div></div><div><h3>Conclusions</h3><div>Both skeletal anchorage protocols for maxillary protraction effectively resolved the severe maxillary deficiency in growing Class III patients.</div></div>","PeriodicalId":43456,"journal":{"name":"Journal of the World Federation of Orthodontists","volume":"14 6","pages":"Pages 318-326"},"PeriodicalIF":3.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144838078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0