Journal of Dental Sciences最新文献_第9页

Rapid response model for mandibular fractures by community clinic dentists under the National Health Insurance in Taiwan 全民健保下社区诊所牙医治疗下颌骨骨折的快速反应模型

IF 3.1 3区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of Dental Sciences

Pub Date : 2026-01-01 Epub Date: 2025-09-03 DOI: 10.1016/j.jds.2025.08.034

Feng-Chou Cheng , Ling-Hsia Wang , Hsiao-Yi Chen, Chun-Pin Chiang

引用次数: 0

Oral health-related quality of life in patients with osteogenesis imperfecta in Taiwan 台湾成骨不全症患者的口腔健康相关生活品质

IF 3.1 3区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of Dental Sciences

Pub Date : 2026-01-01 Epub Date: 2025-09-03 DOI: 10.1016/j.jds.2025.08.032

Kun-Jung Hsu , Han-Sheng Chen , Chun-Ming Chen , Yu-Chuan Tseng , I-Chin Lin

Background/purpose

Osteogenesis imperfecta (OI) is a rare genetic disorder that affects bone and dental structures, often reducing oral health-related quality of life (OHRQoL). Maintaining OHRQoL in individuals with OI depends greatly on their dental conditions. Thus, this study identified key dental factors associated with OHRQoL in this population.

Materials and methods

Thirty-seven patients with OI participated in this cross-sectional study. Data were collected using structured questionnaires on sociodemographic characteristics, oral habits, self-perceived oral health, and OHRQoL. Clinical examinations were performed to evaluate dental status. Associations between dental variables and OHRQoL were analyzed using the Mann–Whitney U test and Kruskal–Wallis test. Multiple logistic regression analysis was used to identify the significant predictors of poor OHRQoL.

Results

Multiple logistic regression analysis revealed that the number of posterior functional tooth units (P-FTUs) was the only significant dental predictor of OHRQoL. A higher P-FTU count was significantly associated with better OHRQoL scores.

Conclusion

An adequate number of P-FTUs is essential for maintaining OHRQoL in patients with OI. In addition to retaining natural teeth or fixed prostheses, ensuring proper distribution and functional occlusion is critical. Clinicians should prioritize treatment strategies that preserve posterior occlusion and provide prosthetic rehabilitation when required to support optimal oral function and quality of life.

背景/目的成骨不全症（osteogenesis imperfecta， OI）是一种罕见的影响骨骼和牙齿结构的遗传性疾病，通常会降低口腔健康相关生活质量（OHRQoL）。成骨不全患者的OHRQoL维持在很大程度上取决于他们的牙齿状况。因此，本研究确定了与该人群OHRQoL相关的关键牙科因素。材料与方法37例成骨不全患者参与了本横断面研究。数据采用结构化问卷收集，包括社会人口学特征、口腔习惯、自我感知口腔健康和OHRQoL。进行临床检查以评估牙齿状况。采用Mann-Whitney U检验和Kruskal-Wallis检验分析牙齿变量与OHRQoL的相关性。采用多元logistic回归分析确定不良OHRQoL的显著预测因素。结果多因素logistic回归分析显示，后功能牙单元（P-FTUs）数量是OHRQoL的唯一显著预测因子。较高的P-FTU计数与较好的OHRQoL评分显著相关。结论足量的p - ftu对维持成骨不全患者的OHRQoL至关重要。除了保留天然牙或固定假体外，确保适当的分布和功能咬合是至关重要的。临床医生应优先考虑保留后牙合的治疗策略，并在需要时提供假肢康复，以支持最佳的口腔功能和生活质量。

{"title":"Oral health-related quality of life in patients with osteogenesis imperfecta in Taiwan","authors":"Kun-Jung Hsu , Han-Sheng Chen , Chun-Ming Chen , Yu-Chuan Tseng , I-Chin Lin","doi":"10.1016/j.jds.2025.08.032","DOIUrl":"10.1016/j.jds.2025.08.032","url":null,"abstract":"<div><h3>Background/purpose</h3><div>Osteogenesis imperfecta (OI) is a rare genetic disorder that affects bone and dental structures, often reducing oral health-related quality of life (OHRQoL). Maintaining OHRQoL in individuals with OI depends greatly on their dental conditions. Thus, this study identified key dental factors associated with OHRQoL in this population.</div></div><div><h3>Materials and methods</h3><div>Thirty-seven patients with OI participated in this cross-sectional study. Data were collected using structured questionnaires on sociodemographic characteristics, oral habits, self-perceived oral health, and OHRQoL. Clinical examinations were performed to evaluate dental status. Associations between dental variables and OHRQoL were analyzed using the Mann–Whitney U test and Kruskal–Wallis test. Multiple logistic regression analysis was used to identify the significant predictors of poor OHRQoL.</div></div><div><h3>Results</h3><div>Multiple logistic regression analysis revealed that the number of posterior functional tooth units (P-FTUs) was the only significant dental predictor of OHRQoL. A higher P-FTU count was significantly associated with better OHRQoL scores.</div></div><div><h3>Conclusion</h3><div>An adequate number of P-FTUs is essential for maintaining OHRQoL in patients with OI. In addition to retaining natural teeth or fixed prostheses, ensuring proper distribution and functional occlusion is critical. Clinicians should prioritize treatment strategies that preserve posterior occlusion and provide prosthetic rehabilitation when required to support optimal oral function and quality of life.</div></div>","PeriodicalId":15583,"journal":{"name":"Journal of Dental Sciences","volume":"21 1","pages":"Pages 274-281"},"PeriodicalIF":3.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145904241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Biofunctionalized 3D-printed gelatin-alginate scaffolds with arginine-glycine-aspartic acid (RGD) peptides for enhanced in vitro osteogenesis 具有精氨酸-甘氨酸-天冬氨酸（RGD）肽的生物功能3d打印明胶-海藻酸酯支架，用于增强体外成骨

IF 3.1 3区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of Dental Sciences

Pub Date : 2026-01-01 Epub Date: 2025-11-06 DOI: 10.1016/j.jds.2025.10.030

Ting-Yi Renn , You-Ru Ma , Chia-Chen Hsu , Eisner Salamanca , Hiroshi Egusa , Ying-Sui Sun , Chun-Pin Lin , Wei-Jen Chang

Background/purpose

Alveolar bone defects are difficult to treat due to ongoing resorption and limitations of conventional grafts. Tissue engineering strategies, particularly 3D hydrogel-based scaffolds, offer promising alternatives by mimicking the extracellular matrix and supporting cell-driven regeneration. This study aimed to incorporating arginine-glycine-aspartic acid (RGD) peptides into 3D-printed gelatin-alginate hydrogels to enhances their bioactivity and osteogenic potential for effective alveolar bone repair.

Materials and methods

The physical characterization of RGD peptides-grafted 3D-printed gelatin-alginate scaffolds was conducted using morphological observation, elemental composition analysis, Fourier-transform infrared spectroscopy (FTIR), and assessments of swelling and degradation behavior. Biological performance was examined in vitro through cell adhesion, proliferation, differentiation (proven by alkaline phosphatase activity), and mineralization (proven by Alizarin red S staining) using MG-63 osteoblastic-like cells.

Results

RGD peptides-grafted 3D-printed gelatin-alginate scaffolds exhibited a porous architecture. Elemental and FTIR analyses confirmed successful peptide incorporation through elevated nitrogen and oxygen content, along with amide and C–H stretching bands. The scaffolds showed stable swelling, reduced degradation, and significantly enhanced MG-63 cell adhesion, proliferation, ALP activity, and mineralization, particularly in the 0.5 mg/mL RGD peptides-grafted group.

Conclusion

RGD peptides modification significantly enhances the structural and biological performance of 3D gelatin-alginate scaffolds, reinforcing their potential as effective materials for alveolar bone regeneration.

背景/目的牙槽骨缺损由于持续吸收和传统移植物的局限性而难以治疗。组织工程策略，特别是基于3D水凝胶的支架，通过模拟细胞外基质和支持细胞驱动再生，提供了有希望的替代方案。本研究旨在将精氨酸-甘氨酸-天冬氨酸（RGD）肽加入到3d打印的明胶-海藻酸盐水凝胶中，以增强其生物活性和成骨潜力，有效修复牙槽骨。材料与方法采用形态学观察、元素组成分析、傅里叶变换红外光谱（FTIR）以及溶胀降解行为评估等方法对RGD肽接枝的3d打印明胶-海藻酸酯支架进行物理表征。使用MG-63成骨样细胞，通过细胞粘附、增殖、分化（通过碱性磷酸酶活性证明）和矿化（通过茜素红S染色证明）来检测体外生物学性能。结果rgd肽接枝的3d打印明胶海藻酸酯支架具有多孔结构。元素分析和红外光谱分析证实，通过提高氮和氧含量，以及酰胺和C-H拉伸带，成功地整合了肽。支架肿胀稳定，降解减少，mg -63细胞粘附、增殖、ALP活性和矿化显著增强，尤其是0.5 mg/mL RGD肽移植组。结论rgd肽修饰可显著提高三维明胶-海藻酸盐支架的结构和生物学性能，增强其作为牙槽骨再生有效材料的潜力。

{"title":"Biofunctionalized 3D-printed gelatin-alginate scaffolds with arginine-glycine-aspartic acid (RGD) peptides for enhanced in vitro osteogenesis","authors":"Ting-Yi Renn , You-Ru Ma , Chia-Chen Hsu , Eisner Salamanca , Hiroshi Egusa , Ying-Sui Sun , Chun-Pin Lin , Wei-Jen Chang","doi":"10.1016/j.jds.2025.10.030","DOIUrl":"10.1016/j.jds.2025.10.030","url":null,"abstract":"<div><h3>Background/purpose</h3><div>Alveolar bone defects are difficult to treat due to ongoing resorption and limitations of conventional grafts. Tissue engineering strategies, particularly 3D hydrogel-based scaffolds, offer promising alternatives by mimicking the extracellular matrix and supporting cell-driven regeneration. This study aimed to incorporating arginine-glycine-aspartic acid (RGD) peptides into 3D-printed gelatin-alginate hydrogels to enhances their bioactivity and osteogenic potential for effective alveolar bone repair.</div></div><div><h3>Materials and methods</h3><div>The physical characterization of RGD peptides-grafted 3D-printed gelatin-alginate scaffolds was conducted using morphological observation, elemental composition analysis, Fourier-transform infrared spectroscopy (FTIR), and assessments of swelling and degradation behavior. Biological performance was examined <em>in vitro</em> through cell adhesion, proliferation, differentiation (proven by alkaline phosphatase activity), and mineralization (proven by Alizarin red S staining) using MG-63 osteoblastic-like cells.</div></div><div><h3>Results</h3><div>RGD peptides-grafted 3D-printed gelatin-alginate scaffolds exhibited a porous architecture. Elemental and FTIR analyses confirmed successful peptide incorporation through elevated nitrogen and oxygen content, along with amide and C–H stretching bands. The scaffolds showed stable swelling, reduced degradation, and significantly enhanced MG-63 cell adhesion, proliferation, ALP activity, and mineralization, particularly in the 0.5 mg/mL RGD peptides-grafted group.</div></div><div><h3>Conclusion</h3><div>RGD peptides modification significantly enhances the structural and biological performance of 3D gelatin-alginate scaffolds, reinforcing their potential as effective materials for alveolar bone regeneration.</div></div>","PeriodicalId":15583,"journal":{"name":"Journal of Dental Sciences","volume":"21 1","pages":"Pages 484-493"},"PeriodicalIF":3.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145904183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Schneiderian membrane perforation upon the advancement of mechanical drills passing through sinus walls: An ex vivo animal study 机械钻穿过窦壁时的施耐德膜穿孔：离体动物研究

IF 3.1 3区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of Dental Sciences

Pub Date : 2026-01-01 Epub Date: 2025-11-13 DOI: 10.1016/j.jds.2025.10.036

Jerry Ching-Yi Lin , Ting-Yi Renn , Chia-Chen Hsu , Wei Jen Chang

Background/purpose

This ex vivo study aimed to evaluate the perforation of Schneiderian membrane upon the advancement of drills incrementally in 1 mm passing through the sinus during the implant site osteotomy with two different drill types and techniques.

Materials and methods

Fifty goat heads with 50 pairs of sinuses were assigned to two groups: osseodensification drill (OD) and inverse conical shape drill (ICSD) to simulate transcrestal sinus elevation. Osteotomy was performed to pass through the lateral sinus wall, advancing the drills incrementally in 1 mm until perforation occurred. The integrity of the Schneiderian membranes was confirmed under a microscope.

Results

The OD group caused sinus perforation after drilling 1 mm beyond the sinus wall, with 8 perforations (16 %) out of 50. The ICSD group only showed perforations after 2 mm of drilling, with 3 perforations (6 %) out of 50. Seventy percent of perforations in the OD group occurred within 3 mm, while 44 % of those in the ICSD group did. Most OD perforations occurred between 2 and 3 mm, while in the ICSD group, they occurred between 3 and 4 mm. No perforation was observed in the ICSD group when drilling up to 1 mm beyond the sinus wall.

Conclusion

Different designs of the drills possessed different tolerance of the advancement of drills exceeding the sinus walls. The ICSD group did not show sinus membrane perforation until the drills extended 2 mm passing through the sinus wall, while the OD group would encounter perforation with less than 1 mm exceeding the sinus walls.

背景/目的本离体研究旨在评估在种植体截骨术中，使用两种不同的钻孔类型和技术，在通过鼻窦增加1mm钻孔时施耐德膜穿孔的情况。材料与方法50头山羊50对鼻窦分为两组：骨密度钻孔（OD）组和反锥形钻孔（ICSD）组，模拟经瓣鼻窦抬高。通过侧窦壁行截骨术，钻孔逐渐推进1mm，直至穿孔。在显微镜下证实了施耐德膜的完整性。结果OD组在窦壁外钻孔1 mm后引起窦穿孔，50例中有8例（16%）穿孔。ICSD组仅在钻孔2mm后出现穿孔，50个中有3个穿孔（6%）。在OD组中，70%的穿孔发生在3毫米以内，而在ICSD组中，这一比例为44%。大多数外径穿孔发生在2 - 3mm之间，而在ICSD组中，它们发生在3 - 4mm之间。ICSD组在钻出窦壁1mm处未见穿孔。结论不同设计的钻头对钻头向前超出窦壁的容忍度不同。ICSD组直到钻头穿过窦壁2mm才出现窦膜穿孔，而OD组则会出现超过窦壁小于1mm的穿孔。

{"title":"Schneiderian membrane perforation upon the advancement of mechanical drills passing through sinus walls: An ex vivo animal study","authors":"Jerry Ching-Yi Lin , Ting-Yi Renn , Chia-Chen Hsu , Wei Jen Chang","doi":"10.1016/j.jds.2025.10.036","DOIUrl":"10.1016/j.jds.2025.10.036","url":null,"abstract":"<div><h3>Background/purpose</h3><div>This <em>ex vivo</em> study aimed to evaluate the perforation of Schneiderian membrane upon the advancement of drills incrementally in 1 mm passing through the sinus during the implant site osteotomy with two different drill types and techniques.</div></div><div><h3>Materials and methods</h3><div>Fifty goat heads with 50 pairs of sinuses were assigned to two groups: osseodensification drill (OD) and inverse conical shape drill (ICSD) to simulate transcrestal sinus elevation. Osteotomy was performed to pass through the lateral sinus wall, advancing the drills incrementally in 1 mm until perforation occurred. The integrity of the Schneiderian membranes was confirmed under a microscope.</div></div><div><h3>Results</h3><div>The OD group caused sinus perforation after drilling 1 mm beyond the sinus wall, with 8 perforations (16 %) out of 50. The ICSD group only showed perforations after 2 mm of drilling, with 3 perforations (6 %) out of 50. Seventy percent of perforations in the OD group occurred within 3 mm, while 44 % of those in the ICSD group did. Most OD perforations occurred between 2 and 3 mm, while in the ICSD group, they occurred between 3 and 4 mm. No perforation was observed in the ICSD group when drilling up to 1 mm beyond the sinus wall.</div></div><div><h3>Conclusion</h3><div>Different designs of the drills possessed different tolerance of the advancement of drills exceeding the sinus walls. The ICSD group did not show sinus membrane perforation until the drills extended 2 mm passing through the sinus wall, while the OD group would encounter perforation with less than 1 mm exceeding the sinus walls.</div></div>","PeriodicalId":15583,"journal":{"name":"Journal of Dental Sciences","volume":"21 1","pages":"Pages 509-514"},"PeriodicalIF":3.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145904186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of orthodontic treatment on masticatory muscle electromyographic patterns in patients with anterior crossbite 正畸治疗对前牙合患者咀嚼肌肌电图的影响

IF 3.1 3区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of Dental Sciences

Pub Date : 2026-01-01 Epub Date: 2025-09-30 DOI: 10.1016/j.jds.2025.09.012

Yi-Mien Cheng , Yueh-Ling Hsieh , Yu-Hsiang Chang , Yuan-Hou Chen , Jian-Hong Yu

Background/purpose

Anterior crossbite affects facial aesthetics and may cause temporomandibular joint disorders and masticatory muscle dysfunction. Prolonged abnormal bite positioning may impact muscle activity and affect treatment stability. Although orthodontic therapy aims to realign teeth and correct bite relationships, the neuromuscular adaptations following treatment remain unclear. This study aims to investigate the changes in masticatory muscle activity before and after orthodontic treatment in patients with anterior crossbite using surface electromyography (sEMG).

Materials and methods

41 participants were recruited and divided into 3 groups: normal occlusion (n = 18), anterior crossbite without treatment (control, n = 6), and anterior crossbite with orthodontic treatment (experimental, n = 13). Muscle activity of the temporalis, masseter, and anterior digastric muscles was recorded across four stages. Measurements included maximum mouth opening, muscle endurance, and sEMG. Data were analyzed using IBM SPSS (IBM Corp., Armonk, NY, USA) with independent t-tests and repeated measures ANOVA.

Results

After orthodontic treatment, the experimental group showed improved mouth opening and biting force. While no significant differences in resting muscle potentials were found between treated patients and the normal group, statistically significant differences were observed between the experimental and control groups in the clenching activity of both left and right temporalis muscles (P < 0.05) throughout all stages of the study (P < 0.05).

Conclusion

Orthodontic treatment improved muscle function in anterior crossbite patients, but muscle activity does not fully normalize. This suggests that post-treatment muscle adaptation may require more time and highlights the importance of monitoring muscle function as part of comprehensive orthodontic care.

背景/目的前牙合影响面部美观，并可能导致颞下颌关节紊乱和咀嚼肌功能障碍。长时间的异常咬合定位可能影响肌肉活动，影响治疗的稳定性。虽然正畸治疗的目的是调整牙齿和正确的咬合关系，但治疗后的神经肌肉适应尚不清楚。本研究旨在利用肌表电图（sEMG）研究正畸治疗前后前牙合患者咀嚼肌活动的变化。材料与方法招募41名受试者，将其分为3组：正常咬合组（n = 18）、未经治疗的前牙合组（n = 6）和接受正畸治疗的前牙合组（n = 13）。颞肌、咬肌和前二腹肌的肌肉活动被记录在四个阶段。测量包括最大张嘴、肌肉耐力和肌电图。数据分析采用IBM SPSS (IBM Corp., Armonk， NY， USA)，采用独立t检验和重复测量方差分析。结果实验组患者在正畸治疗后，口腔开口及咬合力均有明显改善。治疗组与正常组的静息肌电位无显著差异，但在研究的各个阶段，实验组与对照组的左右颞肌握紧活动均有统计学差异（P < 0.05）。结论正畸治疗改善了前牙合患者的肌肉功能，但肌肉活动并未完全恢复正常。这表明治疗后的肌肉适应可能需要更多的时间，并强调了监测肌肉功能作为全面正畸护理的一部分的重要性。

{"title":"Impact of orthodontic treatment on masticatory muscle electromyographic patterns in patients with anterior crossbite","authors":"Yi-Mien Cheng , Yueh-Ling Hsieh , Yu-Hsiang Chang , Yuan-Hou Chen , Jian-Hong Yu","doi":"10.1016/j.jds.2025.09.012","DOIUrl":"10.1016/j.jds.2025.09.012","url":null,"abstract":"<div><h3>Background/purpose</h3><div>Anterior crossbite affects facial aesthetics and may cause temporomandibular joint disorders and masticatory muscle dysfunction. Prolonged abnormal bite positioning may impact muscle activity and affect treatment stability. Although orthodontic therapy aims to realign teeth and correct bite relationships, the neuromuscular adaptations following treatment remain unclear. This study aims to investigate the changes in masticatory muscle activity before and after orthodontic treatment in patients with anterior crossbite using surface electromyography (sEMG).</div></div><div><h3>Materials and methods</h3><div>41 participants were recruited and divided into 3 groups: normal occlusion (n = 18), anterior crossbite without treatment (control, n = 6), and anterior crossbite with orthodontic treatment (experimental, n = 13). Muscle activity of the temporalis, masseter, and anterior digastric muscles was recorded across four stages. Measurements included maximum mouth opening, muscle endurance, and sEMG. Data were analyzed using IBM SPSS (IBM Corp., Armonk, NY, USA) with independent <em>t</em>-tests and repeated measures ANOVA.</div></div><div><h3>Results</h3><div>After orthodontic treatment, the experimental group showed improved mouth opening and biting force. While no significant differences in resting muscle potentials were found between treated patients and the normal group, statistically significant differences were observed between the experimental and control groups in the clenching activity of both left and right temporalis muscles (<em>P</em> < 0.05) throughout all stages of the study (<em>P</em> < 0.05).</div></div><div><h3>Conclusion</h3><div>Orthodontic treatment improved muscle function in anterior crossbite patients, but muscle activity does not fully normalize. This suggests that post-treatment muscle adaptation may require more time and highlights the importance of monitoring muscle function as part of comprehensive orthodontic care.</div></div>","PeriodicalId":15583,"journal":{"name":"Journal of Dental Sciences","volume":"21 1","pages":"Pages 374-382"},"PeriodicalIF":3.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145904022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A cone-beam computed tomography-based morphometric comparison of mandibular molars between Han Chinese and Malays 汉人与马来人下颌磨牙的锥束计算机层析成像形态学比较

IF 3.1 3区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of Dental Sciences

Pub Date : 2026-01-01 Epub Date: 2025-08-29 DOI: 10.1016/j.jds.2025.08.026

Jacob John , Wei Cheong Ngeow , Ting-Chun Shen , Lih-Jyh Fuh , Phrabhakaran Nambiar , Yen-Wen Shen , Jui-Ting Hsu

Background/purpose

Variations in tooth and mandibular morphometry exist among ethnic groups and may have clinical and anthropological implications. This study compared the tooth length and root-to-crown ratio (RCR) of mandibular first (M1) and second (M2) molars in Han Chinese and Malays, and assessed the root length relative to mandibular height (Root-Mandible Ratio @ R: Mand).

Materials and methods

One hundred twenty-one cone-beam computed tomography (CBCT) images were included. Relevant measurements were made using the CBCT software to obtain anatomical and clinical crown and root lengths. The measurements of the mesial and distal roots were averaged and used to calculate the RCR and R: Mand. Sixty-one CBCT scans of Malay patients were retrieved, and another 60 scans were of Han Chinese ethnicity.

Results

There was a statistical difference in the tooth morphometry and their RCRs, with the Malays’ findings being significantly higher than the Han Chinese; the exception being the clinical-RCR (c-RCR) of M2 and the R: Mand at M2. Most parameters were generally significantly larger at M1 than at M2. The mandible height at M1 was similar in both ethnic groups, but the R: Mand of M2 was significantly higher (50.69 %) in the Han Chinese because of their low mandibular height. The Han Chinese have shorter crowns and roots for M1 and M2, and mandible height compared to the Malays at M2.

Conclusion

The observed morphometric differences may reflect underlying genetic and/or environmental factors and possible clinical impacts on facial morphology and occlusion between the two ethnic groups.

背景/目的不同种族之间存在牙齿和下颌形态的差异，可能具有临床和人类学意义。本研究比较了汉族和马来人下颌第一磨牙（M1）和第二磨牙（M2）的牙齿长度和根冠比（RCR），并评估了相对于下颌高度的根长（root- mandible ratio @ R: Mand）。材料与方法纳入121张锥形束计算机断层扫描（CBCT）图像。使用CBCT软件进行相关测量，以获得解剖和临床冠和根长度。取近根和远根测量值的平均值，并用于计算RCR和R: Mand。检索了61例马来患者的CBCT扫描，另外60例汉族患者的CBCT扫描。结果马来人的牙齿形态及rcr差异有统计学意义，马来人显著高于汉族；唯一的例外是M2的临床rcr （c-RCR）和M2的R: Mand。大多数参数在M1处明显大于M2处。两民族在M1处的下颌骨高度相似，但汉族由于下颌高度较低，M2处的R: Mand明显高于汉族（50.69%）。汉人M1和M2的冠和根比马来人短，M2的下颌骨高度比马来人短。结论观察到的形态学差异可能反映了潜在的遗传和/或环境因素以及两民族面部形态和咬合的临床影响。

{"title":"A cone-beam computed tomography-based morphometric comparison of mandibular molars between Han Chinese and Malays","authors":"Jacob John , Wei Cheong Ngeow , Ting-Chun Shen , Lih-Jyh Fuh , Phrabhakaran Nambiar , Yen-Wen Shen , Jui-Ting Hsu","doi":"10.1016/j.jds.2025.08.026","DOIUrl":"10.1016/j.jds.2025.08.026","url":null,"abstract":"<div><h3>Background/purpose</h3><div>Variations in tooth and mandibular morphometry exist among ethnic groups and may have clinical and anthropological implications. This study compared the tooth length and root-to-crown ratio (RCR) of mandibular first (M1) and second (M2) molars in Han Chinese and Malays, and assessed the root length relative to mandibular height (Root-Mandible Ratio @ R: Mand).</div></div><div><h3>Materials and methods</h3><div>One hundred twenty-one cone-beam computed tomography (CBCT) images were included. Relevant measurements were made using the CBCT software to obtain anatomical and clinical crown and root lengths. The measurements of the mesial and distal roots were averaged and used to calculate the RCR and R: Mand. Sixty-one CBCT scans of Malay patients were retrieved, and another 60 scans were of Han Chinese ethnicity.</div></div><div><h3>Results</h3><div>There was a statistical difference in the tooth morphometry and their RCRs, with the Malays’ findings being significantly higher than the Han Chinese; the exception being the clinical-RCR (c-RCR) of M2 and the R: Mand at M2. Most parameters were generally significantly larger at M1 than at M2. The mandible height at M1 was similar in both ethnic groups, but the R: Mand of M2 was significantly higher (50.69 %) in the Han Chinese because of their low mandibular height. The Han Chinese have shorter crowns and roots for M1 and M2, and mandible height compared to the Malays at M2.</div></div><div><h3>Conclusion</h3><div>The observed morphometric differences may reflect underlying genetic and/or environmental factors and possible clinical impacts on facial morphology and occlusion between the two ethnic groups.</div></div>","PeriodicalId":15583,"journal":{"name":"Journal of Dental Sciences","volume":"21 1","pages":"Pages 265-273"},"PeriodicalIF":3.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145904141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Critical factors to ensure stable occlusion in Class III patients following surgical-orthodontic treatment 外科正畸治疗后III类患者牙合稳定的关键因素

IF 3.1 3区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of Dental Sciences

Pub Date : 2026-01-01 Epub Date: 2025-09-23 DOI: 10.1016/j.jds.2025.09.003

Hung-Ying Lin , Sung-Pu Yang , Zwei-Chieng Chang , Chung-Chen Yao , Sang-Heng Kok , Yi-Jane Chen

Background/purpose

Achieving coordination between maxillary and mandibular arches is critical for establishing stable occlusion. This study evaluated posterior occlusal intercupation and identified predictive factors for normal posterior buccal overjet in skeletal Class III patients following surgical-orthodontic treatment.

Materials and methods

A retrospective analysis was conducted on 51 Class III patients (24 males, 27 females) who underwent bimaxillary surgery and orthodontic treatment. Cone-beam computed tomography (CBCT) scans were obtained at three time points: pre-treatment (T0), pre-surgery (T1), and post-treatment (T2). Maxillary transverse discrepancies and buccolingual inclinations of maxillary and mandibular molars were assessed using Amira® 3D Pro software. Patients were categorized according to posterior buccal overjet at T2 into two groups: Group 1 (normal occlusion) and Group 2 (defective occlusion). Intergroup comparisons and logistic regression were conducted to determine predictive factors.

Results

At T0, Group 2 exhibited significantly narrower maxillary arch widths, more maxillary crowding, greater facial divergence, more pronounced maxillary transverse discrepancy (MTD), and increased molar inclinations on the menton non-deviation side compared to Group 1. At T1, molar inclinations were similar between the two groups. At T2, Group 2 continued to exhibit greater facial divergence, a narrower maxillary arch width, and residual MTD. Logistic regression identified the Wits appraisal at T0 and MTD at T1 as significant predictors of post-treatment occlusion.

Conclusion

A logistic regression model incorporating the pre-treatment Wits appraisal and pre-surgical MTD could predict posterior occlusal outcomes after surgical-orthodontic treatment in Class III patients.

背景/目的实现上颌和下颌弓之间的协调是建立稳定咬合的关键。本研究评估了手术-正畸治疗后骨骼III类患者的后牙合嵌塞，并确定了正常后颊覆盖的预测因素。材料与方法回顾性分析51例III类患者（男24例，女27例）行双颌手术及正畸治疗的临床资料。锥形束计算机断层扫描（CBCT）在治疗前（T0）、术前（T1）和治疗后（T2）三个时间点进行扫描。采用Amira®3D Pro软件评估上颌磨牙横向差异和颊舌倾斜度。根据T2后颊覆盖情况将患者分为正常咬合组1和缺陷咬合组2。通过组间比较和逻辑回归来确定预测因素。结果与1组比较，2组上颌弓宽度明显变窄，上颌拥挤程度明显增加，面部散度明显增加，上颌横向差（MTD）明显增加，磨牙无偏侧倾斜度增加。T1时，两组磨牙倾斜度相近。T2时，第2组继续表现出更大的面部散度，更窄的上颌弓宽度和残留的MTD。Logistic回归发现T0时的Wits评估和T1时的MTD是治疗后闭塞的重要预测因子。结论术前Wits评价与术前MTD相结合的logistic回归模型可以预测III类患者手术正畸治疗后的后牙合结局。

{"title":"Critical factors to ensure stable occlusion in Class III patients following surgical-orthodontic treatment","authors":"Hung-Ying Lin , Sung-Pu Yang , Zwei-Chieng Chang , Chung-Chen Yao , Sang-Heng Kok , Yi-Jane Chen","doi":"10.1016/j.jds.2025.09.003","DOIUrl":"10.1016/j.jds.2025.09.003","url":null,"abstract":"<div><h3>Background/purpose</h3><div>Achieving coordination between maxillary and mandibular arches is critical for establishing stable occlusion. This study evaluated posterior occlusal intercupation and identified predictive factors for normal posterior buccal overjet in skeletal Class III patients following surgical-orthodontic treatment.</div></div><div><h3>Materials and methods</h3><div>A retrospective analysis was conducted on 51 Class III patients (24 males, 27 females) who underwent bimaxillary surgery and orthodontic treatment. Cone-beam computed tomography (CBCT) scans were obtained at three time points: pre-treatment (T0), pre-surgery (T1), and post-treatment (T2). Maxillary transverse discrepancies and buccolingual inclinations of maxillary and mandibular molars were assessed using Amira® 3D Pro software. Patients were categorized according to posterior buccal overjet at T2 into two groups: Group 1 (normal occlusion) and Group 2 (defective occlusion). Intergroup comparisons and logistic regression were conducted to determine predictive factors.</div></div><div><h3>Results</h3><div>At T0, Group 2 exhibited significantly narrower maxillary arch widths, more maxillary crowding, greater facial divergence, more pronounced maxillary transverse discrepancy (MTD), and increased molar inclinations on the menton non-deviation side compared to Group 1. At T1, molar inclinations were similar between the two groups. At T2, Group 2 continued to exhibit greater facial divergence, a narrower maxillary arch width, and residual MTD. Logistic regression identified the Wits appraisal at T0 and MTD at T1 as significant predictors of post-treatment occlusion.</div></div><div><h3>Conclusion</h3><div>A logistic regression model incorporating the pre-treatment Wits appraisal and pre-surgical MTD could predict posterior occlusal outcomes after surgical-orthodontic treatment in Class III patients.</div></div>","PeriodicalId":15583,"journal":{"name":"Journal of Dental Sciences","volume":"21 1","pages":"Pages 341-349"},"PeriodicalIF":3.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145904100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Anemia, hematinic deficiencies, and hyperhomocysteinemia in younger and older oral lichen planus patients 贫血，血液学缺陷和高同型半胱氨酸血症在年轻和老年口腔扁平苔藓患者

IF 3.1 3区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of Dental Sciences

Pub Date : 2026-01-01 Epub Date: 2025-10-10 DOI: 10.1016/j.jds.2025.09.017

Yu-Hsueh Wu , Julia Yu-Fong Chang , Yi-Pang Lee , Yi-Ping Wang , Andy Sun , Chun-Pin Chiang

Background/purpose

Our previous study found that 25.2 %, 16.8 %, 10.2 %, 1.2 %, and 21.1 % of 588 oral lichen planus (OLP) patients have anemia, serum iron, vitamin B12, and folic acid deficiencies, and hyperhomocysteinemia, respectively. This study mainly assessed the anemia, hematinic deficiencies, and hyperhomocysteinemia in 190 younger (≤50 years old) and 398 older (>50 years old) OLP patients.

Materials and methods

The blood hemoglobin (Hb) and serum iron, vitamin B12, folic acid, and homocysteine levels in 190 younger and 398 older OLP patients were measured and compared with the corresponding levels in 190 younger (≤50 years old) and 398 older (>50 years old) healthy control subjects (HCSs), respectively.

Results

We discovered that 190 younger OLP patients had significantly lower mean blood Hb and serum iron, vitamin B12, and folic acid levels than 190 younger HCSs. Moreover, 398 older OLP patients had significantly lower mean blood Hb, and serum iron, vitamin B12, and folic acid levels and significantly higher mean serum homocysteine level than 398 older HCSs. In addition, 190 younger OLP patients had significantly lower mean serum vitamin B12, folic acid, and homocysteine levels, and a significantly higher frequency of iron deficiency and significantly lower frequencies of vitamin B12 deficiency and hyperhomocysteinemia than 398 older OLP patients.

Conclusion

The younger OLP patients do have significantly lower mean serum vitamin B12 and folic acid levels, and a significantly higher frequency of serum iron deficiency but a significantly lower frequency of serum vitamin B12 deficiency than the older OLP patients.

背景/目的我们之前的研究发现588例口腔扁平苔藓（OLP）患者中分别有25.2%、16.8%、10.2%、1.2%和21.1%存在贫血、血清铁、维生素B12和叶酸缺乏以及高同型半胱氨酸血症。本研究主要评估了190例年轻（≤50岁）和398例老年（≤50岁）OLP患者的贫血、血凝缺乏症和高同型半胱氨酸血症。材料与方法测定190例年轻OLP患者和398例老年OLP患者的血红蛋白（Hb）和血清铁、维生素B12、叶酸、同型半胱氨酸水平，并分别与190例年轻（≤50岁）和398例老年（≤50岁）健康对照（hcs）进行比较。结果我们发现190例年轻OLP患者的平均血Hb和血清铁、维生素B12和叶酸水平明显低于190例年轻hcs。此外，398例老年OLP患者的平均血Hb、血清铁、维生素B12和叶酸水平显著低于398例老年hcs，平均血清同型半胱氨酸水平显著高于398例老年hcs。此外，190名年轻OLP患者的平均血清维生素B12、叶酸和同型半胱氨酸水平显著低于398名老年OLP患者，缺铁频率显著高于老年OLP患者，维生素B12缺乏和高同型半胱氨酸血症频率显著低于老年OLP患者。结论年轻OLP患者血清维生素B12和叶酸水平明显低于老年OLP患者，血清铁缺乏频率明显高于老年OLP患者，维生素B12缺乏频率明显低于老年OLP患者。

{"title":"Anemia, hematinic deficiencies, and hyperhomocysteinemia in younger and older oral lichen planus patients","authors":"Yu-Hsueh Wu , Julia Yu-Fong Chang , Yi-Pang Lee , Yi-Ping Wang , Andy Sun , Chun-Pin Chiang","doi":"10.1016/j.jds.2025.09.017","DOIUrl":"10.1016/j.jds.2025.09.017","url":null,"abstract":"<div><h3>Background/purpose</h3><div>Our previous study found that 25.2 %, 16.8 %, 10.2 %, 1.2 %, and 21.1 % of 588 oral lichen planus (OLP) patients have anemia, serum iron, vitamin B12, and folic acid deficiencies, and hyperhomocysteinemia, respectively. This study mainly assessed the anemia, hematinic deficiencies, and hyperhomocysteinemia in 190 younger (≤50 years old) and 398 older (>50 years old) OLP patients.</div></div><div><h3>Materials and methods</h3><div>The blood hemoglobin (Hb) and serum iron, vitamin B12, folic acid, and homocysteine levels in 190 younger and 398 older OLP patients were measured and compared with the corresponding levels in 190 younger (≤50 years old) and 398 older (>50 years old) healthy control subjects (HCSs), respectively.</div></div><div><h3>Results</h3><div>We discovered that 190 younger OLP patients had significantly lower mean blood Hb and serum iron, vitamin B12, and folic acid levels than 190 younger HCSs. Moreover, 398 older OLP patients had significantly lower mean blood Hb, and serum iron, vitamin B12, and folic acid levels and significantly higher mean serum homocysteine level than 398 older HCSs. In addition, 190 younger OLP patients had significantly lower mean serum vitamin B12, folic acid, and homocysteine levels, and a significantly higher frequency of iron deficiency and significantly lower frequencies of vitamin B12 deficiency and hyperhomocysteinemia than 398 older OLP patients.</div></div><div><h3>Conclusion</h3><div>The younger OLP patients do have significantly lower mean serum vitamin B12 and folic acid levels, and a significantly higher frequency of serum iron deficiency but a significantly lower frequency of serum vitamin B12 deficiency than the older OLP patients.</div></div>","PeriodicalId":15583,"journal":{"name":"Journal of Dental Sciences","volume":"21 1","pages":"Pages 350-357"},"PeriodicalIF":3.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145904101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparison of image quality, color accuracy, and resolution in intraoral photography using digital single lens reflex camera and smartphone cameras: A pilot study 使用数码单反相机和智能手机相机进行口腔内摄影的图像质量、色彩准确性和分辨率的比较：一项试点研究

IF 3.1 3区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of Dental Sciences

Pub Date : 2026-01-01 Epub Date: 2025-10-07 DOI: 10.1016/j.jds.2025.09.015

Saif Momin , Hasan Sarfaraz , Karthik Sengottuvel , Rajesh Shetty , Sazia Amreen , Mallika Shetty

Background/purpose

Dental photography plays a key role in diagnosis, documentation, and communication in the field of dentistry. The digital single-lens reflex (DSLR) cameras are the gold standard for image quality, but advances in modern smartphone technology necessitate evaluating their performance in resolution, distortion, magnification, color accuracy, and overall image quality. The purpose of this study was to compare DSLR cameras and smartphone cameras regarding resolution, distortion, magnification, color accuracy, and overall image quality in intra- and extraoral dental photography.

Materials and methods

A Nikon Z5 full-frame DSLR with a 105 mm macro lens and twin flash (control) was compared with three flagship smartphones: iPhone 15 Pro, Google Pixel 8, and Samsung S24. Ten participants were photographed in five standardized dental views: maximum intercuspation, right lateral occlusion, maxillary anterior with black contrastor, mandibular arch (mirror view), and front profile. Images were analyzed using the GNU Image Manipulation Program (GIMP 2.1); statistical analysis was performed with Statistical Package for the Social Sciences (SPSS) 27.

Results

The Samsung S24 closely matched the DSLR in shade accuracy and distortion. Google Pixel 8 produced an acceptable resolution (<300 dots per inch). The iPhone 15 Pro demonstrated superior performance in reducing distortion and maintaining clarity (P < 0.05).

Conclusion

Despite the convenience and affordability of smartphone cameras, DSLR systems demonstrate superior performance in terms of magnification, image resolution, and color accuracy. These advantages render DSLRs more suitable for clinical applications that demand high precision and diagnostic reliability in dental photography.

背景/目的牙科摄影在牙科领域的诊断、记录和交流中起着关键作用。数码单反（DSLR）相机是图像质量的黄金标准，但现代智能手机技术的进步需要评估它们在分辨率、失真、放大倍率、色彩精度和整体图像质量方面的表现。本研究的目的是比较数码单反相机和智能手机相机在口腔内和口腔外摄影的分辨率、失真、放大倍数、色彩精度和整体图像质量。材料和方法采用尼康Z5全画幅单反相机105mm微距镜头和双闪光灯（控制）与三款旗舰智能手机：iPhone 15 Pro、谷歌Pixel 8和三星S24进行比较。10名参与者在5个标准化的牙齿视图中拍照：最大间隔，右侧咬合，上颌前牙黑色对比，下颌弓（镜视图）和前轮廓。使用GNU图像处理程序（GIMP 2.1）对图像进行分析；采用SPSS (statistical Package for Social Sciences) 27进行统计分析。结果三星S24在阴影精度和失真方面与单反非常接近。像素8产生了一个可接受的分辨率（每英寸300点）。iPhone 15 Pro在减少失真和保持清晰度方面表现出色（P < 0.05）。尽管智能手机相机方便、价格实惠，但数码单反系统在放大倍率、图像分辨率和色彩精度方面表现优异。这些优点使得dslr更适合临床应用，需要高精度和诊断可靠性的牙科摄影。

{"title":"Comparison of image quality, color accuracy, and resolution in intraoral photography using digital single lens reflex camera and smartphone cameras: A pilot study","authors":"Saif Momin , Hasan Sarfaraz , Karthik Sengottuvel , Rajesh Shetty , Sazia Amreen , Mallika Shetty","doi":"10.1016/j.jds.2025.09.015","DOIUrl":"10.1016/j.jds.2025.09.015","url":null,"abstract":"<div><h3>Background/purpose</h3><div>Dental photography plays a key role in diagnosis, documentation, and communication in the field of dentistry. The digital single-lens reflex (DSLR) cameras are the gold standard for image quality, but advances in modern smartphone technology necessitate evaluating their performance in resolution, distortion, magnification, color accuracy, and overall image quality. The purpose of this study was to compare DSLR cameras and smartphone cameras regarding resolution, distortion, magnification, color accuracy, and overall image quality in intra- and extraoral dental photography.</div></div><div><h3>Materials and methods</h3><div>A Nikon Z5 full-frame DSLR with a 105 mm macro lens and twin flash (control) was compared with three flagship smartphones: iPhone 15 Pro, Google Pixel 8, and Samsung S24. Ten participants were photographed in five standardized dental views: maximum intercuspation, right lateral occlusion, maxillary anterior with black contrastor, mandibular arch (mirror view), and front profile. Images were analyzed using the GNU Image Manipulation Program (GIMP 2.1); statistical analysis was performed with Statistical Package for the Social Sciences (SPSS) 27.</div></div><div><h3>Results</h3><div>The Samsung S24 closely matched the DSLR in shade accuracy and distortion. Google Pixel 8 produced an acceptable resolution (<300 dots per inch). The iPhone 15 Pro demonstrated superior performance in reducing distortion and maintaining clarity (<em>P</em> < 0.05).</div></div><div><h3>Conclusion</h3><div>Despite the convenience and affordability of smartphone cameras, DSLR systems demonstrate superior performance in terms of magnification, image resolution, and color accuracy. These advantages render DSLRs more suitable for clinical applications that demand high precision and diagnostic reliability in dental photography.</div></div>","PeriodicalId":15583,"journal":{"name":"Journal of Dental Sciences","volume":"21 1","pages":"Pages 358-366"},"PeriodicalIF":3.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145904102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Open contacts adjacent to posterior dental implants: Current understanding and emerging preventive concepts 与后牙种植体相邻的开放接触：当前的理解和新兴的预防概念

IF 3.1 3区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of Dental Sciences

Pub Date : 2026-01-01 Epub Date: 2025-09-03 DOI: 10.1016/j.jds.2025.08.035

Chiun-Lin Steven Liu , Shih-Cheng Wen , Ching-Jung Chang Chien , Je-Kang Du

Open proximal contacts between posterior dental implant restorations and adjacent natural teeth are a common yet underappreciated complication. This review examines the multifactorial etiology of open contact formation, including biomechanical discrepancies, prosthetic and surgical factors, occlusal force dynamics, and natural tooth migration. The clinical consequences-ranging from food impaction and gingival inflammation to proximal bone loss and diminished patient satisfaction-are also analyzed. These complications not only affected oral hygiene and comfort but might also contribute to peri-implant tissue breakdown and increased maintenance needs. Existing preventive and corrective strategies, such as prosthetic over-contouring, splinted restorations, and occlusal equilibration, are reviewed with attention to their limitations in long-term effectiveness. In response, this article introduces biomechanically informed occlusal adjustment concepts, including the mesial–mesial/distal–distal (MM-DD) technique, as a potential proactive approach. While preliminary clinical observations suggest that the MM-DD technique may help preserve proximal contact integrity and reduce implant-related complications, further prospective validation is required. This review provides a balanced synthesis of current evidence and evolving strategies to enhance the long-term stability of proximal contacts in posterior implant therapy.

后牙种植体修复体与邻近自然牙之间的近端接触是常见但未被重视的并发症。这篇综述探讨了开放接触形成的多因素病因，包括生物力学差异、假体和手术因素、咬合力动力学和自然牙齿迁移。临床结果-从食物嵌塞和牙龈炎症到近端骨质流失和患者满意度降低-也进行了分析。这些并发症不仅影响口腔卫生和舒适，而且可能导致种植体周围组织破坏和维护需求增加。现有的预防和矫正策略，如假体过度轮廓，夹板修复和咬合平衡，回顾了他们的局限性，在长期的有效性。因此，本文介绍了生物力学方面的咬合调整概念，包括中-中/远-远端（MM-DD）技术，作为一种潜在的主动方法。虽然初步的临床观察表明MM-DD技术可能有助于保持近端接触完整性并减少种植体相关并发症，但需要进一步的前瞻性验证。这篇综述提供了一个平衡的综合目前的证据和不断发展的策略，以提高在后路种植体治疗中近端接触的长期稳定性。

{"title":"Open contacts adjacent to posterior dental implants: Current understanding and emerging preventive concepts","authors":"Chiun-Lin Steven Liu , Shih-Cheng Wen , Ching-Jung Chang Chien , Je-Kang Du","doi":"10.1016/j.jds.2025.08.035","DOIUrl":"10.1016/j.jds.2025.08.035","url":null,"abstract":"<div><div>Open proximal contacts between posterior dental implant restorations and adjacent natural teeth are a common yet underappreciated complication. This review examines the multifactorial etiology of open contact formation, including biomechanical discrepancies, prosthetic and surgical factors, occlusal force dynamics, and natural tooth migration. The clinical consequences-ranging from food impaction and gingival inflammation to proximal bone loss and diminished patient satisfaction-are also analyzed. These complications not only affected oral hygiene and comfort but might also contribute to peri-implant tissue breakdown and increased maintenance needs. Existing preventive and corrective strategies, such as prosthetic over-contouring, splinted restorations, and occlusal equilibration, are reviewed with attention to their limitations in long-term effectiveness. In response, this article introduces biomechanically informed occlusal adjustment concepts, including the mesial–mesial/distal–distal (MM-DD) technique, as a potential proactive approach. While preliminary clinical observations suggest that the MM-DD technique may help preserve proximal contact integrity and reduce implant-related complications, further prospective validation is required. This review provides a balanced synthesis of current evidence and evolving strategies to enhance the long-term stability of proximal contacts in posterior implant therapy.</div></div>","PeriodicalId":15583,"journal":{"name":"Journal of Dental Sciences","volume":"21 1","pages":"Pages 9-18"},"PeriodicalIF":3.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145903819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0