A. M. F. Syed Mohamed, Nurul Naziha Yusop, Nurul Sabryna Rasidi, Asma Ashari, Amy Liew Kia Cheen
An assessment of orthodontic treatment duration and results allows for measurable outcomes, goal-setting, and the establishment of patient management standards. It is important information that can be utilised for educational purposes in an orthodontic postgraduate program. The aim of this study was to determine correlations of the parameters within and between the Objective Grading System (OGS), Discrepancy Index (DI) and Treatment Complexity Index (TCI) and identify those factors associated with treatment outcomes and duration. This retrospective cohort study involved a consecutive sampling of 242 pre- and post-treatment patient records from the postgraduate orthodontic clinic between 2013 and 2017. The cases were assessed using the DI, OGS, and TCI pre-treatment. Treatment outcomes were assessed using the OGS. Spearman’s Rank Correlation Coefficients were computed within and between the indices. Multiple and logistic regressions were used to evaluate associations between treatment outcomes and duration, respectively. Within DI, significant correlations (p < 0.05) were observed between overjet-overbite, overjet-occlusal relationship, overjet-crowding, overbite-anterior open bite, overbite-crowding, anterior open bite-lateral open bite, anterior open bite-crowding, lingual posterior cross bite-crowding. Within pre-OGS, significant correlations (p < 0.05) were observed between alignment-marginal ridge, alignment-occlusal relationship, alignment-root angulation, overjet-interproximal contact, marginal ridge-buccolingual inclination, marginal ridge-overjet, marginal ridge-occlusal contact, marginal ridge-occlusal relationship, overjet-occlusal contact, overjet-occlusal relationship, overjet-root angulation, occlusal relationship-root angulation, interproximal contact-root angulation. Within TCI, functional appliance correlated with orthognathic surgery (p < 0.001), rapid palatal expansion (RPE) (p = 0.005) and multidisciplinary collaboration (p = 0.001). Pre-OGS correlated with DI (p < 0.001) and TCI (p = 0.026). Cephalometric (p = 0.002) and other conditions (p = 0.031) were associated with treatment outcomes. RPE was associated with extended treatment duration (p = 0.014). DI, OGS, and TCI exhibited weak correlations within and between indices. Cephalometric values, clinical conditions, and RPE use should be carefully considered during treatment planning.
{"title":"Discrepancy index, treatment complexity index and objective Grading system: correlation between parameters, indices and implications for treatment","authors":"A. M. F. Syed Mohamed, Nurul Naziha Yusop, Nurul Sabryna Rasidi, Asma Ashari, Amy Liew Kia Cheen","doi":"10.2478/aoj-2024-0016","DOIUrl":"https://doi.org/10.2478/aoj-2024-0016","url":null,"abstract":"\u0000 \u0000 \u0000 An assessment of orthodontic treatment duration and results allows for measurable outcomes, goal-setting, and the establishment of patient management standards. It is important information that can be utilised for educational purposes in an orthodontic postgraduate program. The aim of this study was to determine correlations of the parameters within and between the Objective Grading System (OGS), Discrepancy Index (DI) and Treatment Complexity Index (TCI) and identify those factors associated with treatment outcomes and duration.\u0000 \u0000 \u0000 \u0000 This retrospective cohort study involved a consecutive sampling of 242 pre- and post-treatment patient records from the postgraduate orthodontic clinic between 2013 and 2017. The cases were assessed using the DI, OGS, and TCI pre-treatment. Treatment outcomes were assessed using the OGS. Spearman’s Rank Correlation Coefficients were computed within and between the indices. Multiple and logistic regressions were used to evaluate associations between treatment outcomes and duration, respectively.\u0000 \u0000 \u0000 \u0000 Within DI, significant correlations (p < 0.05) were observed between overjet-overbite, overjet-occlusal relationship, overjet-crowding, overbite-anterior open bite, overbite-crowding, anterior open bite-lateral open bite, anterior open bite-crowding, lingual posterior cross bite-crowding. Within pre-OGS, significant correlations (p < 0.05) were observed between alignment-marginal ridge, alignment-occlusal relationship, alignment-root angulation, overjet-interproximal contact, marginal ridge-buccolingual inclination, marginal ridge-overjet, marginal ridge-occlusal contact, marginal ridge-occlusal relationship, overjet-occlusal contact, overjet-occlusal relationship, overjet-root angulation, occlusal relationship-root angulation, interproximal contact-root angulation. Within TCI, functional appliance correlated with orthognathic surgery (p < 0.001), rapid palatal expansion (RPE) (p = 0.005) and multidisciplinary collaboration (p = 0.001). Pre-OGS correlated with DI (p < 0.001) and TCI (p = 0.026). Cephalometric (p = 0.002) and other conditions (p = 0.031) were associated with treatment outcomes. RPE was associated with extended treatment duration (p = 0.014).\u0000 \u0000 \u0000 \u0000 DI, OGS, and TCI exhibited weak correlations within and between indices. Cephalometric values, clinical conditions, and RPE use should be carefully considered during treatment planning.\u0000","PeriodicalId":48559,"journal":{"name":"Australasian Orthodontic Journal","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141838308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Amir Hatami, S. Naoum, R. Lee, J. M. Razza, M. Goonewardene
The purpose of this cross-sectional study was to survey the perception and attitude of Australian orthodontists toward accelerated orthodontic treatments. An online questionnaire was distributed to 427 members of the Australian Society of Orthodontists. The questions related to: clinic demographics, familiarity with appliances/procedures to accelerate orthodontic treatment, the use of appliances/procedures to accelerate orthodontic treatment, and satisfaction with the outcomes when employing these appliances/procedures. The response rate was 42.38%. Of the respondents, 26.6% used customised fixed appliances which provided satisfactory outcomes. A small proportion of the respondents routinely used adjunctive procedures to accelerate treatment: 3.5% (n=6) corticotomies, 1.2% (n=2) piezocision, and 1.2% (n=2) intraoral vibrating devices. Although a significant number of Australian orthodontists use customised fixed appliances to improve the efficiency of orthodontic treatment, the use of adjunctive procedures to accelerate tooth movement remains very low. Further research is needed to understand the possible limitations and restrictions surrounding this area of practice.
{"title":"Orthodontists’ perception and attitude toward accelerated orthodontic treatments in Australia","authors":"Amir Hatami, S. Naoum, R. Lee, J. M. Razza, M. Goonewardene","doi":"10.2478/aoj-2024-0017","DOIUrl":"https://doi.org/10.2478/aoj-2024-0017","url":null,"abstract":"\u0000 \u0000 \u0000 The purpose of this cross-sectional study was to survey the perception and attitude of Australian orthodontists toward accelerated orthodontic treatments.\u0000 \u0000 \u0000 \u0000 An online questionnaire was distributed to 427 members of the Australian Society of Orthodontists. The questions related to: clinic demographics, familiarity with appliances/procedures to accelerate orthodontic treatment, the use of appliances/procedures to accelerate orthodontic treatment, and satisfaction with the outcomes when employing these appliances/procedures.\u0000 \u0000 \u0000 \u0000 The response rate was 42.38%. Of the respondents, 26.6% used customised fixed appliances which provided satisfactory outcomes. A small proportion of the respondents routinely used adjunctive procedures to accelerate treatment: 3.5% (n=6) corticotomies, 1.2% (n=2) piezocision, and 1.2% (n=2) intraoral vibrating devices.\u0000 \u0000 \u0000 \u0000 Although a significant number of Australian orthodontists use customised fixed appliances to improve the efficiency of orthodontic treatment, the use of adjunctive procedures to accelerate tooth movement remains very low. Further research is needed to understand the possible limitations and restrictions surrounding this area of practice.\u0000","PeriodicalId":48559,"journal":{"name":"Australasian Orthodontic Journal","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141849836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nara Grazieli Martins Lima, Lavínia Costa, P. Santos
Artificial Intelligence (AI) simulates human intelligence in machines capable of rational response and actions. AI’s growth in healthcare, particularly in dentistry, has been remarkable in aiding clinical practices from appointment scheduling to treatment outcome predictions. In orthodontics, AI effectively handles tasks such as automated landmark detection, diagnosing orthodontic needs, assessing maxillary constriction, and selecting appliances. ChatGPT, an AI-based program by OpenAI, excels in generating human-like responses, making it useful across many applications, including those in dentistry. AI enhances personalised patient communication, supports diagnosis and decision-making, digitises patient data, and aids in disease prevention and treatment. In addition, ChatGPT offers support in personalised care, billing, and patient health monitoring. Patients benefit from its help in finding providers, scheduling initial appointments, accessing health information, improving healthcare access and service effectiveness. However, there are limitations. ChatGPT sometimes produces nonsensical responses and poses privacy risks associated with patient data. Generated medical advice might not therefore match professional expertise. Despite these issues, if trained properly, ChatGPT could significantly enhance medical knowledge dissemination. Future studies should weigh the benefits of AI against its risks, and users must verify AI-generated information with reliable sources to ensure effective patient care.
{"title":"ChatGPT in orthodontics: limitations and possibilities","authors":"Nara Grazieli Martins Lima, Lavínia Costa, P. Santos","doi":"10.2478/aoj-2024-0018","DOIUrl":"https://doi.org/10.2478/aoj-2024-0018","url":null,"abstract":"\u0000 Artificial Intelligence (AI) simulates human intelligence in machines capable of rational response and actions. AI’s growth in healthcare, particularly in dentistry, has been remarkable in aiding clinical practices from appointment scheduling to treatment outcome predictions. In orthodontics, AI effectively handles tasks such as automated landmark detection, diagnosing orthodontic needs, assessing maxillary constriction, and selecting appliances. ChatGPT, an AI-based program by OpenAI, excels in generating human-like responses, making it useful across many applications, including those in dentistry. AI enhances personalised patient communication, supports diagnosis and decision-making, digitises patient data, and aids in disease prevention and treatment. In addition, ChatGPT offers support in personalised care, billing, and patient health monitoring. Patients benefit from its help in finding providers, scheduling initial appointments, accessing health information, improving healthcare access and service effectiveness. However, there are limitations. ChatGPT sometimes produces nonsensical responses and poses privacy risks associated with patient data. Generated medical advice might not therefore match professional expertise. Despite these issues, if trained properly, ChatGPT could significantly enhance medical knowledge dissemination. Future studies should weigh the benefits of AI against its risks, and users must verify AI-generated information with reliable sources to ensure effective patient care.","PeriodicalId":48559,"journal":{"name":"Australasian Orthodontic Journal","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141842649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ruoyan Zhang, Linyi Li, Zhiyao Lu, Zhixin Song, Xinyue Fan, Jianing Xu, Xu Zhang, Z. Jin, Yanning Ma
To establish tooth movement boundaries in four directions by a novel morphometric analysis of alveolar bone using conebeam computed tomography (CBCT) images. The aim was to assist clinicians in minimising the occurrence of bone fenestration and dehiscence, thereby facilitating safe and efficient orthodontic treatment. CBCT images of 123 male volunteers comprising 55 individuals with hypodivergent vertical skeletal patterns and 68 individuals with normodivergent vertical skeletal patterns and normal occlusions but without a history of previous orthodontic treatment, were analysed. The mesiodistal and labiolingual alveolar bone height (ABH) as well as the labiolingual cancellous bone thickness (CBT) were measured in relation to the maxillary and mandibular anterior teeth and premolars. These parameters were subsequently compared between the different vertical skeletal patterns. Teeth within the extended aesthetic zone exhibited a limited range of safe movement on the labial aspect across all three root aspects, with 97.6% of the upper lateral incisors and 98.4% of the lower lateral incisors positioned against the labial cortical plate (<0.5 mm). The lingual aspects had significantly more space for tooth movement compared with the labial aspects (P < 0.05). The ABH was significantly greater in the hypodivergent group than the normodivergent group involving particular teeth and sites in the maxilla (P < 0.05), while no significant difference was noted in the mandible. The hypodivergent group also exhibited thicker cancellous bone on most labial and some lingual aspects. The findings provided the average tooth movement range in the horizontal and vertical directions within the extended aesthetic zone in male individuals presenting with a normal occlusion. It was concluded that a hypodivergent growth pattern may have a relatively large range of safe tooth movement in the sagittal and vertical directions.
{"title":"Multidimensional tooth movement boundaries in the extended aesthetic zone: a cone-beam computed tomography study","authors":"Ruoyan Zhang, Linyi Li, Zhiyao Lu, Zhixin Song, Xinyue Fan, Jianing Xu, Xu Zhang, Z. Jin, Yanning Ma","doi":"10.2478/aoj-2024-0004","DOIUrl":"https://doi.org/10.2478/aoj-2024-0004","url":null,"abstract":"\u0000 \u0000 \u0000 To establish tooth movement boundaries in four directions by a novel morphometric analysis of alveolar bone using conebeam computed tomography (CBCT) images. The aim was to assist clinicians in minimising the occurrence of bone fenestration and dehiscence, thereby facilitating safe and efficient orthodontic treatment.\u0000 \u0000 \u0000 \u0000 CBCT images of 123 male volunteers comprising 55 individuals with hypodivergent vertical skeletal patterns and 68 individuals with normodivergent vertical skeletal patterns and normal occlusions but without a history of previous orthodontic treatment, were analysed. The mesiodistal and labiolingual alveolar bone height (ABH) as well as the labiolingual cancellous bone thickness (CBT) were measured in relation to the maxillary and mandibular anterior teeth and premolars. These parameters were subsequently compared between the different vertical skeletal patterns.\u0000 \u0000 \u0000 \u0000 Teeth within the extended aesthetic zone exhibited a limited range of safe movement on the labial aspect across all three root aspects, with 97.6% of the upper lateral incisors and 98.4% of the lower lateral incisors positioned against the labial cortical plate (<0.5 mm). The lingual aspects had significantly more space for tooth movement compared with the labial aspects (P < 0.05). The ABH was significantly greater in the hypodivergent group than the normodivergent group involving particular teeth and sites in the maxilla (P < 0.05), while no significant difference was noted in the mandible. The hypodivergent group also exhibited thicker cancellous bone on most labial and some lingual aspects.\u0000 \u0000 \u0000 \u0000 The findings provided the average tooth movement range in the horizontal and vertical directions within the extended aesthetic zone in male individuals presenting with a normal occlusion. It was concluded that a hypodivergent growth pattern may have a relatively large range of safe tooth movement in the sagittal and vertical directions.\u0000","PeriodicalId":48559,"journal":{"name":"Australasian Orthodontic Journal","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140516772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Li Mei, Carrol Jin, Aishah Na, Jamie Marra, Simon Guan, J. Choi
The biomechanical behaviour of clear aligners can affect the clinical efficacy of tooth movement. To investigate the aging effects of clear aligners to suggest an optimal wear time from the biomechanical perspective. Brand new “as-received” (0-day) clear aligners (Invisalign, Align Co., USA) were immersed in distilled water and placed in an incubator at a constant temperature of 37°C for 21 days to simulate the aging process encountered in the oral cavity. The biomechanical properties (flexural strength, translucency, surface roughness, hardness, and tensile strength) of the clear aligners were assessed each day. The flexural strength was measured using a digital tension gauge; translucency was assessed using the Vita Easyshade digital spectrophotometer; surface roughness was measured using a profilometer; hardness was measured by the indentation test; and tensile strength was measured using a universal testing machine. The flexural strength decreased significantly after 7 days (0.22 ± 0.01 N at 3 mm compression; 0.35 ± 0.01 N at 5 mm compression) compared with the baseline (0.26 ± 0.01 N, 0.41 ± 0.01 N, respectively) (difference = 0.15 N, p < 0.05 for both). The hardness decreased significantly after 10 days (4.37 ± 0.48 kgf/mm2) compared with the baseline (6.60 ± 0.43 kgf/mm2) (difference = 2.23 kgf/mm2, p < 0.05). No significant change was found in translucency (p = 0.38), internal surface roughness (p = 0.99), external surface roughness (p = 0.57), and tensile strength (p = 0.84) during the 21 days of simulated aging. The flexural strength and hardness of the clear aligners decreased significantly after 7 days and 10 days, respectively. Surface roughness, translucency, and tensile strength varied little during the 21 days of artificial aging.
{"title":"Biomechanical aging behaviour of clear aligners","authors":"Li Mei, Carrol Jin, Aishah Na, Jamie Marra, Simon Guan, J. Choi","doi":"10.2478/aoj-2024-0006","DOIUrl":"https://doi.org/10.2478/aoj-2024-0006","url":null,"abstract":"\u0000 \u0000 \u0000 The biomechanical behaviour of clear aligners can affect the clinical efficacy of tooth movement.\u0000 \u0000 \u0000 \u0000 To investigate the aging effects of clear aligners to suggest an optimal wear time from the biomechanical perspective.\u0000 \u0000 \u0000 \u0000 Brand new “as-received” (0-day) clear aligners (Invisalign, Align Co., USA) were immersed in distilled water and placed in an incubator at a constant temperature of 37°C for 21 days to simulate the aging process encountered in the oral cavity. The biomechanical properties (flexural strength, translucency, surface roughness, hardness, and tensile strength) of the clear aligners were assessed each day. The flexural strength was measured using a digital tension gauge; translucency was assessed using the Vita Easyshade digital spectrophotometer; surface roughness was measured using a profilometer; hardness was measured by the indentation test; and tensile strength was measured using a universal testing machine.\u0000 \u0000 \u0000 \u0000 The flexural strength decreased significantly after 7 days (0.22 ± 0.01 N at 3 mm compression; 0.35 ± 0.01 N at 5 mm compression) compared with the baseline (0.26 ± 0.01 N, 0.41 ± 0.01 N, respectively) (difference = 0.15 N, p < 0.05 for both). The hardness decreased significantly after 10 days (4.37 ± 0.48 kgf/mm2) compared with the baseline (6.60 ± 0.43 kgf/mm2) (difference = 2.23 kgf/mm2, p < 0.05). No significant change was found in translucency (p = 0.38), internal surface roughness (p = 0.99), external surface roughness (p = 0.57), and tensile strength (p = 0.84) during the 21 days of simulated aging.\u0000 \u0000 \u0000 \u0000 The flexural strength and hardness of the clear aligners decreased significantly after 7 days and 10 days, respectively. Surface roughness, translucency, and tensile strength varied little during the 21 days of artificial aging.\u0000","PeriodicalId":48559,"journal":{"name":"Australasian Orthodontic Journal","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140522446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Surgery combined with orthodontic uprighting of impacted mandibular second molars requires sequential treatment procedures. This article presents a rare case of horizontally impacted bilateral mandibular second molars accompanied by dental crowding. The patient’s mandibular second molars were fully embedded in bone with overlying mesially-impacted mandibular third molars and the mandibular first molars were inclined distally. The treatment involved staged bilateral extraction of the second premolars and mandibular third molars, followed by the surgical implantation of micro-implants for anchorage in the mandibular ramus. At a subsequent stage, the mandibular second molars were successfully orthodontically uprighted, leading to a favourable treatment outcome.
{"title":"Surgery combined with orthodontic treatment for bilateral horizontally impacted mandibular second molars: A case report","authors":"Kongliang Li, Tingting Wang, Xueqin Bai","doi":"10.2478/aoj-2024-0007","DOIUrl":"https://doi.org/10.2478/aoj-2024-0007","url":null,"abstract":"\u0000 Surgery combined with orthodontic uprighting of impacted mandibular second molars requires sequential treatment procedures. This article presents a rare case of horizontally impacted bilateral mandibular second molars accompanied by dental crowding. The patient’s mandibular second molars were fully embedded in bone with overlying mesially-impacted mandibular third molars and the mandibular first molars were inclined distally. The treatment involved staged bilateral extraction of the second premolars and mandibular third molars, followed by the surgical implantation of micro-implants for anchorage in the mandibular ramus. At a subsequent stage, the mandibular second molars were successfully orthodontically uprighted, leading to a favourable treatment outcome.","PeriodicalId":48559,"journal":{"name":"Australasian Orthodontic Journal","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140519913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The first molar has been reported to be the most caries prone tooth in the permanent dentition. Rarely is the extraction of the four first molars the ideal choice in orthodontic treatment, especially the extraction of four molars and four premolars. However, the extraction program presents a treatment alternative in selected cases. In the following case report, the orthodontic treatment is described a 15-year-old male patient who presented with a dentoskeletal bimaxillary protrusion, and a chief complaint of”crooked teeth”. Moreover, the patient had a skeletal Class I malocclusion with crowded dentitions, a hyperdivergent growth pattern, deviated midlines and an extremely deep Curve of Spee. A satisfactory treatment outcome was obtained by the extraction of four premolars and four compromised first molars. The mechanics involved alignment, levelling, detailing the occlusion using a straight arch wire technique followed by retention. The active treatment time was 48 months. The treatment successfully achieved a bilateral Class I relationship of the canines and the right molars, a mild Class III relationship of the left molars, a normal overjet and overbite, aligned dental midlines, optimal intercuspation and a harmonious facial profile. The occlusion remained stable during 5 years of review.
据报道，第一磨牙是恒牙中最容易龋坏的牙齿。在正畸治疗中，拔除四颗第一磨牙，尤其是拔除四颗臼齿和四颗前臼齿，很少是理想的选择。然而，拔牙方案在某些情况下也是一种治疗选择。在下面的病例报告中，描述了一名 15 岁男性患者的正畸治疗，他的牙齿骨骼双颌前突，主诉是 "牙齿歪斜"。此外，该患者的骨骼错颌畸形为 I 类，牙列拥挤，生长模式过度分化，中线偏离，脊柱弯曲极深。通过拔除四颗前磨牙和四颗受损的第一磨牙，取得了令人满意的治疗效果。力学治疗包括对齐、矫治、使用直弓丝技术细化咬合，然后进行固位。积极治疗时间为 48 个月。治疗成功后，双侧犬齿和右侧臼齿达到了 I 类关系，左侧臼齿达到了轻度 III 类关系，过咬合和过咬合正常，牙齿中线对齐，牙间隙最佳，面部轮廓和谐。在 5 年的复查中，咬合情况保持稳定。
{"title":"A patient with bimaxillary protrusion was treated by the extraction of four premolars and four compromised first molars: a case report","authors":"Jiajun Deng, Siting Zeng, Yijia Chen, Qunle Shao, Shaoyun Zhou","doi":"10.2478/aoj-2024-0001","DOIUrl":"https://doi.org/10.2478/aoj-2024-0001","url":null,"abstract":"\u0000 The first molar has been reported to be the most caries prone tooth in the permanent dentition. Rarely is the extraction of the four first molars the ideal choice in orthodontic treatment, especially the extraction of four molars and four premolars. However, the extraction program presents a treatment alternative in selected cases. In the following case report, the orthodontic treatment is described a 15-year-old male patient who presented with a dentoskeletal bimaxillary protrusion, and a chief complaint of”crooked teeth”. Moreover, the patient had a skeletal Class I malocclusion with crowded dentitions, a hyperdivergent growth pattern, deviated midlines and an extremely deep Curve of Spee. A satisfactory treatment outcome was obtained by the extraction of four premolars and four compromised first molars. The mechanics involved alignment, levelling, detailing the occlusion using a straight arch wire technique followed by retention. The active treatment time was 48 months. The treatment successfully achieved a bilateral Class I relationship of the canines and the right molars, a mild Class III relationship of the left molars, a normal overjet and overbite, aligned dental midlines, optimal intercuspation and a harmonious facial profile. The occlusion remained stable during 5 years of review.","PeriodicalId":48559,"journal":{"name":"Australasian Orthodontic Journal","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140527117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Elif Dilara Şeker, Elif Kaymakcioglu, Şerife Şahi̇n, G. Kurt
To compare bone thickness, bone height, and density in the infrazygomatic crest (IZC) and the mandibular buccal shelf (MBS) associated with different sagittal skeletal patterns. This retrospective study included three groups of which a Class I group consisted of 28 patients (24 female, 4 male, mean age: 26.46 ± 6.1), a Class II group comprised 31 patients (28 female, 3 male, mean age: 30.08 ± 5.9), and a Class III group included 26 patients (22 female, 4 male, mean age: 26.21 ± 5.3). Evaluations of bone characteristics were performed for both the IZC and MBS using cone-beam computed tomography (CBCT). Maxillary length and mandibular body length were also measured on lateral cephalograms. One-way ANOVA, chi-squared, and Spearman’s correlation tests were applied for statistical analysis. The Class II group showed significantly greater bone thickness at the distal root level of the maxillary second molar in IZC (p < 0.05). While bone thickness showed no statistically significant difference in the MBS between the groups (p > 0.05), the Class II group showed significantly higher bone height values at the distal root level of the mandibular second molar in the MBS (p < 0.05). A statistically significant increase from the mesial aspect to the distal aspect was observed in total bone thickness in the Class I group and total bone thickness and height in the Class II and III groups in the MBS. The mandibular body length and SNB values were positively correlated with the total bone thickness and bone height of the MBS. Bone thickness in the IZC and bone density in both the IZC and MBS were similar in the different sagittal skeletal patterns. Total bone thickness in the Class I and III groups and the total bone height in the Class II group showed a gradual increase from the mesial to the distal in the MBS. The length of the mandibular body may be a clinical clue to assist in the selection of the appropriate implantation area.
{"title":"Evaluation of the infrazygomatic crest and mandibular buccal shelf in different sagittal skeletal patterns: a cone-beam computed tomography study","authors":"Elif Dilara Şeker, Elif Kaymakcioglu, Şerife Şahi̇n, G. Kurt","doi":"10.2478/aoj-2024-0002","DOIUrl":"https://doi.org/10.2478/aoj-2024-0002","url":null,"abstract":"\u0000 \u0000 \u0000 To compare bone thickness, bone height, and density in the infrazygomatic crest (IZC) and the mandibular buccal shelf (MBS) associated with different sagittal skeletal patterns.\u0000 \u0000 \u0000 \u0000 This retrospective study included three groups of which a Class I group consisted of 28 patients (24 female, 4 male, mean age: 26.46 ± 6.1), a Class II group comprised 31 patients (28 female, 3 male, mean age: 30.08 ± 5.9), and a Class III group included 26 patients (22 female, 4 male, mean age: 26.21 ± 5.3). Evaluations of bone characteristics were performed for both the IZC and MBS using cone-beam computed tomography (CBCT). Maxillary length and mandibular body length were also measured on lateral cephalograms. One-way ANOVA, chi-squared, and Spearman’s correlation tests were applied for statistical analysis.\u0000 \u0000 \u0000 \u0000 The Class II group showed significantly greater bone thickness at the distal root level of the maxillary second molar in IZC (p < 0.05). While bone thickness showed no statistically significant difference in the MBS between the groups (p > 0.05), the Class II group showed significantly higher bone height values at the distal root level of the mandibular second molar in the MBS (p < 0.05). A statistically significant increase from the mesial aspect to the distal aspect was observed in total bone thickness in the Class I group and total bone thickness and height in the Class II and III groups in the MBS. The mandibular body length and SNB values were positively correlated with the total bone thickness and bone height of the MBS.\u0000 \u0000 \u0000 \u0000 Bone thickness in the IZC and bone density in both the IZC and MBS were similar in the different sagittal skeletal patterns. Total bone thickness in the Class I and III groups and the total bone height in the Class II group showed a gradual increase from the mesial to the distal in the MBS. The length of the mandibular body may be a clinical clue to assist in the selection of the appropriate implantation area.\u0000","PeriodicalId":48559,"journal":{"name":"Australasian Orthodontic Journal","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140521017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Li Mei, Zhixin Wang, Olivia Guo, Lucy Zhang, G. Guan
To quantitatively and qualitatively analyse the content, reliability and quality of TikTok videos related to orthodontic fixed appliances. A new TikTok account was created, and three searches were conducted (#braces, #braceface and #bracetips). A total of 150 videos (n = 50 featured in the ‘Top’ tab were extracted for each of the three searches) were assessed for the analyses of quality, content and reliability using the modified DISCERN tool, a content score, and the Global Quality Scale (GQS). A total of 136 videos satisfied the inclusion criteria, involving 46.3% identified by dental professionals and 53.7% identified by laypersons. Of these, the videos uploaded by dental professionals rated higher in the three scoring tools compared to laypersons. The GQS score of videos was 2.36/5 and the content score was 1.31/5. Over 60% of the videos were of poor quality according to the GQS scale. A strong correlation between GQS and DISCERN scores was found. The overall content, reliability, and quality of TikTok videos regarding orthodontic fixed appliances was poor. The videos allowed patients to supplement their knowledge about fixed appliances and become more involved in their orthodontic care; however, guidelines should be explored to ensure the dissemination of accurate orthodontic information on TikTok.
{"title":"TikTok talks teeth: a quantitative and qualitative analysis of fixed appliance related TikTok videos","authors":"Li Mei, Zhixin Wang, Olivia Guo, Lucy Zhang, G. Guan","doi":"10.2478/aoj-2024-0005","DOIUrl":"https://doi.org/10.2478/aoj-2024-0005","url":null,"abstract":"\u0000 \u0000 \u0000 To quantitatively and qualitatively analyse the content, reliability and quality of TikTok videos related to orthodontic fixed appliances.\u0000 \u0000 \u0000 \u0000 A new TikTok account was created, and three searches were conducted (#braces, #braceface and #bracetips). A total of 150 videos (n = 50 featured in the ‘Top’ tab were extracted for each of the three searches) were assessed for the analyses of quality, content and reliability using the modified DISCERN tool, a content score, and the Global Quality Scale (GQS).\u0000 \u0000 \u0000 \u0000 A total of 136 videos satisfied the inclusion criteria, involving 46.3% identified by dental professionals and 53.7% identified by laypersons. Of these, the videos uploaded by dental professionals rated higher in the three scoring tools compared to laypersons. The GQS score of videos was 2.36/5 and the content score was 1.31/5. Over 60% of the videos were of poor quality according to the GQS scale. A strong correlation between GQS and DISCERN scores was found.\u0000 \u0000 \u0000 \u0000 The overall content, reliability, and quality of TikTok videos regarding orthodontic fixed appliances was poor. The videos allowed patients to supplement their knowledge about fixed appliances and become more involved in their orthodontic care; however, guidelines should be explored to ensure the dissemination of accurate orthodontic information on TikTok.\u0000","PeriodicalId":48559,"journal":{"name":"Australasian Orthodontic Journal","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140524840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Rüveyda Doğrugören, Kübra Gülnur Topsakal, G. S. Duran, Berat Serdar Akdenizv, S. Görgülü
This study aimed to evaluate the torque effectiveness of different attachment types and power ridges used in clear aligner therapy (CAT) on the upper lateral incisors. A typodont model simulating oral conditions was developed. Two hundred lateral incisor samples were divided into five groups based on attachment types and clear aligner modifications: no attachments (NA), horizontal ellipsoid attachment (HEA), vertical ellipsoid attachment (VEA), buccal power ridge (BPR), and buccal and palatal power ridge (BPPR). Subsequently, a 5° palatal torque moment was applied to the lateral incisors. In-house clear aligners were inserted, and 3D scanning was performed after each aligner step. Post-treatment 3D models were compared with pre-treatment models. The lateral incisors were assessed for torque, tipping, and rotational movements. The HEA group (41.6%) and the BPPR group (40.8%) showed significantly higher torque effectiveness than the NA group (20%) when 5° of torque was delivered. The planned movement was approximated when 1° and 2° of torque were applied in the NA group (114% and 98%, respectively). The NA and BPR groups showed the highest loss of anchorage. When more than 3° of torque was applied, HEA and BPPR were more effective than NA in achieving the CAT’s planned torque of the upper lateral incisors, although with an efficacy rate of approximately 40%. It is challenging to achieve torque movement using CAT. When less than 3° of torque was required, additional mechanics were not necessary. BPPR and HEA showed higher effectiveness when 5° of torque was applied. The efficacy of BPR was similar to that of NA.
{"title":"Efficacy of in-house clear aligner therapy mechanics on root torque: an in-vitro study","authors":"Rüveyda Doğrugören, Kübra Gülnur Topsakal, G. S. Duran, Berat Serdar Akdenizv, S. Görgülü","doi":"10.2478/aoj-2024-0003","DOIUrl":"https://doi.org/10.2478/aoj-2024-0003","url":null,"abstract":"\u0000 \u0000 \u0000 This study aimed to evaluate the torque effectiveness of different attachment types and power ridges used in clear aligner therapy (CAT) on the upper lateral incisors.\u0000 \u0000 \u0000 \u0000 A typodont model simulating oral conditions was developed. Two hundred lateral incisor samples were divided into five groups based on attachment types and clear aligner modifications: no attachments (NA), horizontal ellipsoid attachment (HEA), vertical ellipsoid attachment (VEA), buccal power ridge (BPR), and buccal and palatal power ridge (BPPR). Subsequently, a 5° palatal torque moment was applied to the lateral incisors. In-house clear aligners were inserted, and 3D scanning was performed after each aligner step. Post-treatment 3D models were compared with pre-treatment models. The lateral incisors were assessed for torque, tipping, and rotational movements.\u0000 \u0000 \u0000 \u0000 The HEA group (41.6%) and the BPPR group (40.8%) showed significantly higher torque effectiveness than the NA group (20%) when 5° of torque was delivered. The planned movement was approximated when 1° and 2° of torque were applied in the NA group (114% and 98%, respectively). The NA and BPR groups showed the highest loss of anchorage.\u0000 \u0000 \u0000 \u0000 When more than 3° of torque was applied, HEA and BPPR were more effective than NA in achieving the CAT’s planned torque of the upper lateral incisors, although with an efficacy rate of approximately 40%.\u0000 \u0000 \u0000 \u0000 \u0000 \u0000 It is challenging to achieve torque movement using CAT.\u0000 \u0000 \u0000 When less than 3° of torque was required, additional mechanics were not necessary.\u0000 \u0000 \u0000 BPPR and HEA showed higher effectiveness when 5° of torque was applied.\u0000 \u0000 \u0000 The efficacy of BPR was similar to that of NA.\u0000 \u0000 \u0000","PeriodicalId":48559,"journal":{"name":"Australasian Orthodontic Journal","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140518519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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