American Journal of Orthodontics and Dentofacial Orthopedics最新文献_第6页

The visual perceptions of chin deviations in different facial types among orthodontists, orthodontic patients, and laypersons 正畸医师、正畸患者及外行人对不同面部类型下颌偏差的视觉知觉。

IF 3 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

American Journal of Orthodontics and Dentofacial Orthopedics

Pub Date : 2025-11-01 DOI: 10.1016/j.ajodo.2025.08.003

Navid Naseri , Shahram Hamedani , Mohamad Shirkhani , Neda Mehrasa , Dorna Shirali , Tahereh Baherimoghadam

Introduction

Multiple factors may influence the threshold at which chin deviation is detected and the point at which it is perceived as esthetically unacceptable. This study aimed to identify and compare the detection thresholds for chin deviation among orthodontists, orthodontic patients, and laypersons, and to assess how these thresholds vary across different facial types.

Methods

Photographs of a female subject were digitally manipulated to create 3 facial types (euryprosopic, mesoprosopic, and leptoprosopic) and 7 chin deviations ranging from 0° (no alteration) to 6° (most severe alteration). Evaluators assessed the attractiveness of each image using a visual analog scale and also determined whether treatment was needed. Responses were collected from orthodontists (n = 245), orthodontic patients (n = 443), and laypersons (n = 513). Analysis of variance, general linear model, and post-hoc tests were employed to determine the attractiveness ratings and diagnostic thresholds for chin asymmetries across different facial types.

Results

All 3 evaluator groups rated 0° and 1° deviations as the most attractive across all facial types. Orthodontists were able to detect chin deviation at lower thresholds, 2° in the euryprosopic type, and 1° in the mesoprosopic and leptoprosopic types. Orthodontic patients identified chin deviations at 3° in euryprosopic and mesoprosopic types (male evaluators), and at 2° mesoprosopic (female evaluators) and leptoprosopic types. Laypersons detected chin deviations at the highest thresholds (ie, 4° in euryprosopic and 3° in both mesoprosopic and leptoprosopic types).

Conclusions

Orthodontists were the most perceptive evaluators, followed by orthodontic patients, whereas laypersons were the most lenient in their assessments. Facial type influenced the threshold at which chin deviations were perceived as unacceptable, with the euryprosopic facial type showing greater tolerance for chin deviation.

多种因素可能会影响检测到的下巴偏差的阈值和被认为是美学上不可接受的点。本研究旨在识别和比较正畸医生、正畸患者和外行人对下巴偏差的检测阈值，并评估这些阈值在不同面部类型之间的差异。方法：对女性受试者的照片进行数字处理，产生3种面部类型（全斜视、中斜视和瘦斜视）和7个下巴偏差，范围从0°（无变化）到6°（最严重变化）。评估人员使用视觉模拟量表评估每张图像的吸引力，并确定是否需要治疗。收集了来自正畸医生（n = 245）、正畸患者（n = 443）和门外汉（n = 513）的反馈。采用方差分析、一般线性模型和后期检验来确定不同面部类型的下巴不对称的吸引力评分和诊断阈值。结果：所有3个评估组都将0°和1°偏差评为所有面部类型中最具吸引力的。正畸医生能够在较低的阈值下检测到下巴偏差，全斜视型为2°，中斜视和细斜视型为1°。正畸患者在全盲型和中盲型（男性评估者）和中盲型（女性评估者）中发现的下巴偏差为3°，在中盲型（女性评估者）和细盲型中发现的偏差为2°。外行人在最高阈值处检测到下巴偏差（即，全盲型为4°，中盲型和细盲型均为3°）。结论：正畸医师是最敏感的评价者，其次是正畸患者，而非专业人员的评价最宽松。面部类型影响下巴偏差被认为是不可接受的阈值，泛泛面部类型对下巴偏差表现出更大的容忍度。

{"title":"The visual perceptions of chin deviations in different facial types among orthodontists, orthodontic patients, and laypersons","authors":"Navid Naseri , Shahram Hamedani , Mohamad Shirkhani , Neda Mehrasa , Dorna Shirali , Tahereh Baherimoghadam","doi":"10.1016/j.ajodo.2025.08.003","DOIUrl":"10.1016/j.ajodo.2025.08.003","url":null,"abstract":"<div><h3>Introduction</h3><div>Multiple factors may influence the threshold at which chin deviation is detected and the point at which it is perceived as esthetically unacceptable. This study aimed to identify and compare the detection thresholds for chin deviation among orthodontists, orthodontic patients, and laypersons, and to assess how these thresholds vary across different facial types.</div></div><div><h3>Methods</h3><div>Photographs of a female subject were digitally manipulated to create 3 facial types (euryprosopic, mesoprosopic, and leptoprosopic) and 7 chin deviations ranging from 0° (no alteration) to 6° (most severe alteration). Evaluators assessed the attractiveness of each image using a visual analog scale and also determined whether treatment was needed. Responses were collected from orthodontists (n = 245), orthodontic patients (n = 443), and laypersons (n = 513). Analysis of variance, general linear model, and post-hoc tests were employed to determine the attractiveness ratings and diagnostic thresholds for chin asymmetries across different facial types.</div></div><div><h3>Results</h3><div>All 3 evaluator groups rated 0° and 1° deviations as the most attractive across all facial types. Orthodontists were able to detect chin deviation at lower thresholds, 2° in the euryprosopic type, and 1° in the mesoprosopic and leptoprosopic types. Orthodontic patients identified chin deviations at 3° in euryprosopic and mesoprosopic types (male evaluators), and at 2° mesoprosopic (female evaluators) and leptoprosopic types. Laypersons detected chin deviations at the highest thresholds (ie, 4° in euryprosopic and 3° in both mesoprosopic and leptoprosopic types).</div></div><div><h3>Conclusions</h3><div>Orthodontists were the most perceptive evaluators, followed by orthodontic patients, whereas laypersons were the most lenient in their assessments. Facial type influenced the threshold at which chin deviations were perceived as unacceptable, with the euryprosopic facial type showing greater tolerance for chin deviation.</div></div>","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"168 5","pages":"Pages 639-650"},"PeriodicalIF":3.0,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145151919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Beyond the impact factor: Measuring journal quality 超越影响因子：衡量期刊质量

IF 3 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

American Journal of Orthodontics and Dentofacial Orthopedics

Pub Date : 2025-11-01 DOI: 10.1016/j.ajodo.2025.09.001

Jae Hyun Park (Editor-in-Chief)

引用次数: 0

November 2025 Continuing Education 2025年11月

IF 3 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

American Journal of Orthodontics and Dentofacial Orthopedics

Pub Date : 2025-11-01 DOI: 10.1016/j.ajodo.2025.09.014

Dr Allen H. Moffitt (CE Editor)

引用次数: 0

Deep learning-assisted comparison of different models for predicting maxillary canine impaction on panoramic radiography 基于深度学习的颌齿嵌塞全景x线摄影预测模型比较。

IF 3 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

American Journal of Orthodontics and Dentofacial Orthopedics

Pub Date : 2025-11-01 DOI: 10.1016/j.ajodo.2025.05.008

Chunmiao Zhang , Hailin Zhu , Hu Long , Yuchao Shi , Jixiang Guo , Meng You

Introduction

The panoramic radiograph is the most commonly used imaging modality for predicting maxillary canine impaction. Several prediction models have been constructed based on panoramic radiographs. This study aimed to compare the prediction accuracy of existing models in an external validation facilitated by an automatic landmark detection system based on deep learning.

Methods

Patients aged 7-14 years who underwent panoramic radiographic examinations and received a diagnosis of impacted canines were included in the study. An automatic landmark localization system was employed to assist the measurement of geometric parameters on the panoramic radiographs, followed by the calculated prediction of the canine impaction. Three prediction models constructed by Arnautska, Alqerban et al, and Margot et al were evaluated. The metrics of accuracy, sensitivity, specificity, precision, and area under the receiver operating characteristic curve (AUC) were used to compare the performance of different models.

Results

A total of 102 panoramic radiographs with 102 impacted canines and 102 nonimpacted canines were analyzed in this study. The prediction outcomes indicated that the model by Margot et al achieved the highest performance, with a sensitivity of 95% and a specificity of 86% (AUC, 0.97), followed by the model by Arnautska, with a sensitivity of 93% and a specificity of 71% (AUC, 0.94). The model by Alqerban et al showed poor performance with an AUC of only 0.20.

Conclusions

Two of the existing predictive models exhibited good diagnostic accuracy, whereas the third model demonstrated suboptimal performance. Nonetheless, even the most effective model is constrained by several limitations, such as logical and computational challenges, which necessitate further refinement.

全景x线片是预测上颌牙嵌塞最常用的成像方式。基于全景x光片建立了几种预测模型。本研究旨在比较现有模型在基于深度学习的自动地标检测系统的外部验证中的预测精度。方法：7-14岁的患者接受了全景x线检查并被诊断为埋伏犬。采用自动地标定位系统辅助全景式x线片几何参数的测量，并对牙体嵌塞进行计算预测。对Arnautska、Alqerban等和Margot等构建的三种预测模型进行了评价。准确度、灵敏度、特异性、精密度和受试者工作特征曲线下面积等指标用于比较不同模型的性能。结果：本研究共分析了102张包含102只阻生犬和102只非阻生犬的全景x线片。预测结果显示，Margot等人的模型预测效果最好，灵敏度为95%，特异性为86% (AUC, 0.97)，其次是Arnautska模型，灵敏度为93%，特异性为71% （AUC, 0.94）。Alqerban等人的模型表现不佳，AUC仅为0.20。结论：现有的两个预测模型表现出良好的诊断准确性，而第三个模型表现出次优的性能。尽管如此，即使是最有效的模型也受到一些限制的约束，例如逻辑和计算方面的挑战，这需要进一步改进。

{"title":"Deep learning-assisted comparison of different models for predicting maxillary canine impaction on panoramic radiography","authors":"Chunmiao Zhang , Hailin Zhu , Hu Long , Yuchao Shi , Jixiang Guo , Meng You","doi":"10.1016/j.ajodo.2025.05.008","DOIUrl":"10.1016/j.ajodo.2025.05.008","url":null,"abstract":"<div><h3>Introduction</h3><div>The panoramic radiograph is the most commonly used imaging modality for predicting maxillary canine impaction. Several prediction models have been constructed based on panoramic radiographs. This study aimed to compare the prediction accuracy of existing models in an external validation facilitated by an automatic landmark detection system based on deep learning.</div></div><div><h3>Methods</h3><div>Patients aged 7-14 years who underwent panoramic radiographic examinations and received a diagnosis of impacted canines were included in the study. An automatic landmark localization system was employed to assist the measurement of geometric parameters on the panoramic radiographs, followed by the calculated prediction of the canine impaction. Three prediction models constructed by Arnautska, Alqerban et al, and Margot et al were evaluated. The metrics of accuracy, sensitivity, specificity, precision, and area under the receiver operating characteristic curve (AUC) were used to compare the performance of different models.</div></div><div><h3>Results</h3><div>A total of 102 panoramic radiographs with 102 impacted canines and 102 nonimpacted canines were analyzed in this study. The prediction outcomes indicated that the model by Margot et al achieved the highest performance, with a sensitivity of 95% and a specificity of 86% (AUC, 0.97), followed by the model by Arnautska, with a sensitivity of 93% and a specificity of 71% (AUC, 0.94). The model by Alqerban et al showed poor performance with an AUC of only 0.20.</div></div><div><h3>Conclusions</h3><div>Two of the existing predictive models exhibited good diagnostic accuracy, whereas the third model demonstrated suboptimal performance. Nonetheless, even the most effective model is constrained by several limitations, such as logical and computational challenges, which necessitate further refinement.</div></div>","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"168 5","pages":"Pages 579-588.e2"},"PeriodicalIF":3.0,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144651139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Comparative evaluation of the accuracy of customized lingual orthodontic brackets fabricated by metal 3-dimensional printing and casting: An in vitro study 金属三维打印与铸造定制舌正畸托槽精度的体外比较研究。

IF 3 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

American Journal of Orthodontics and Dentofacial Orthopedics

Pub Date : 2025-11-01 DOI: 10.1016/j.ajodo.2025.05.002

Viet Anh Nguyen , Khanh Linh Trinh , Thi Lan Anh Le , Huy Cong Nguyen , Thu Tra Nguyen

Introduction

Customized lingual orthodontic brackets require high accuracy for optimal clinical performance. Metal 3-dimensional (3D) printing and casting techniques using 3D-printed wax patterns have emerged as fabrication methods. However, comparative evaluations of their dimensional accuracy and frictional behavior remain limited. This study aimed to evaluate and compare the accuracy and frictional characteristics of customized lingual brackets fabricated using selective laser melting and conventional casting.

Methods

Thirty-six customized lingual brackets (n = 18 per group) were fabricated. The trueness and actual gaps of the bracket base were assessed using triple-scan superimposition. Positional accuracy was evaluated by linear and angular deviations, and dimensional accuracy was assessed through slot height error and convergence angle. Frictional force was measured by pulling an archwire through the bracket slot. After polishing and thermocycling, dimensional and frictional evaluations were repeated. Data were analyzed using independent samples t tests (P <0.05).

Results

Three-dimensional-printed brackets showed significantly higher trueness errors (34.5 μm) and slot height errors (29.69 μm) than cast brackets (25.2 and 21.28 μm). Frictional force was also significantly higher in the as-fabricated 3D-printed group (3.61 and 2.46 N; P <0.001). Postpolishing significantly reduced friction but did not eliminate the differences, whereas dimensional differences were no longer statistically significant between groups. Positional accuracy and convergence angle showed no significant differences between groups.

Conclusions

Three-dimensional printing and casting techniques both achieved clinically acceptable positional accuracy. However, dimensional discrepancies and higher friction in 3D-printed brackets highlight the need for optimized postprocessing to enhance clinical performance.

介绍：定制的舌正畸托槽要求高精度，以达到最佳的临床效果。使用3D打印蜡图案的金属三维（3D）打印和铸造技术已经成为制造方法。然而，对它们的尺寸精度和摩擦性能的比较评估仍然有限。本研究旨在评估和比较使用选择性激光熔化和传统铸造制造的定制舌托的精度和摩擦特性。方法：制作定制牙托36个，每组18个。采用三扫描叠加法评估支架底座的真实度和实际间隙。通过线差和角差评价定位精度，通过槽高误差和收敛角评价尺寸精度。通过拉一根拱线穿过支架槽来测量摩擦力。抛光和热循环后，重复尺寸和摩擦评估。结果：三维打印支架的正确度误差（34.5 μm）和槽位高度误差（29.69 μm）显著高于铸造支架（25.2 μm和21.28 μm）。3d打印组的摩擦力也明显更高(3.61和2.46 N；结论：三维打印和铸造技术均达到临床可接受的定位精度。然而，3d打印支架的尺寸差异和更高的摩擦突出了优化后处理以提高临床表现的必要性。

{"title":"Comparative evaluation of the accuracy of customized lingual orthodontic brackets fabricated by metal 3-dimensional printing and casting: An in vitro study","authors":"Viet Anh Nguyen , Khanh Linh Trinh , Thi Lan Anh Le , Huy Cong Nguyen , Thu Tra Nguyen","doi":"10.1016/j.ajodo.2025.05.002","DOIUrl":"10.1016/j.ajodo.2025.05.002","url":null,"abstract":"<div><h3>Introduction</h3><div>Customized lingual orthodontic brackets require high accuracy for optimal clinical performance. Metal 3-dimensional (3D) printing and casting techniques using 3D-printed wax patterns have emerged as fabrication methods. However, comparative evaluations of their dimensional accuracy and frictional behavior remain limited. This study aimed to evaluate and compare the accuracy and frictional characteristics of customized lingual brackets fabricated using selective laser melting and conventional casting.</div></div><div><h3>Methods</h3><div><span>Thirty-six customized lingual brackets (n = 18 per group) were fabricated. The trueness and actual gaps of the bracket base were assessed using triple-scan superimposition. Positional accuracy was evaluated by linear and angular deviations, and dimensional accuracy was assessed through slot height error and convergence angle. Frictional force was measured by pulling an archwire through the bracket slot. After polishing and thermocycling, dimensional and frictional evaluations were repeated. Data were analyzed using independent samples </span><em>t</em> tests (<em>P</em> <0.05).</div></div><div><h3>Results</h3><div>Three-dimensional-printed brackets showed significantly higher trueness errors (34.5 μm) and slot height errors (29.69 μm) than cast brackets (25.2 and 21.28 μm). Frictional force was also significantly higher in the as-fabricated 3D-printed group (3.61 and 2.46 N; <em>P</em> <0.001). Postpolishing significantly reduced friction but did not eliminate the differences, whereas dimensional differences were no longer statistically significant between groups. Positional accuracy and convergence angle showed no significant differences between groups.</div></div><div><h3>Conclusions</h3><div>Three-dimensional printing and casting techniques both achieved clinically acceptable positional accuracy. However, dimensional discrepancies and higher friction in 3D-printed brackets highlight the need for optimized postprocessing to enhance clinical performance.</div></div>","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"168 5","pages":"Pages 542-550"},"PeriodicalIF":3.0,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144152825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 the effects of total arch intrusion treatment in adolescents and adults: A pilot study 青少年和成人全足弓侵入治疗效果的比较：一项初步研究。

IF 3 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

American Journal of Orthodontics and Dentofacial Orthopedics

Pub Date : 2025-11-01 DOI: 10.1016/j.ajodo.2025.05.010

Hye-Young Sim , Jung-Sub An , Min-Ho Jung

Introduction

This study aimed to examine the effectiveness of total arch intrusion (TAI) treatment in patients with skeletal Class II malocclusion with retruded mandible and compare the treatment changes between adolescents and adults.

Methods

We retrospectively analyzed cephalometric radiographs of 30 patients who underwent TAI using miniscrews. Growing adolescent patients were classified as group 1 (G1), whereas nongrowing patients were classified as group 2 (G2). There were 16 patients in G1 and 14 in G2, and the average ages at the start of treatment were 13.2 years and 27.8 years, respectively. Pretreatment and posttreatment cephalometric measurements and changes were compared, and the correlation among these measurements was analyzed.

Results

Significant decreases were observed in mandibular plane angle (P <0.001); however, no significant difference was observed between the 2 groups. There was a significantly greater increase in SNB (P <0.05) and facial height ratio (P <0.01) and a decrease in ANB (P <0.01) in G1. The pogonion to nasion perpendicular line increased more in G1 (5.11 mm) than in G2 (3.88 mm), but this difference was not statistical significant. In correlation analysis, the mandibular plane rotation had a strong correlation with changes in Pog to N perp in G1, but there was a weak correlation in G2.

Conclusions

TAI was an effective treatment option to improve the retrognathic profile. The adolescent group showed significantly greater anteroposterior skeletal improvement and profile changes than the adult group with TAI.

前言：本研究旨在探讨全弓侵入（TAI）治疗骨性ⅱ类错颌后缩的有效性，并比较青少年和成人治疗的变化。方法：回顾性分析30例使用微型螺钉行TAI的患者的头颅x线片。生长中的青少年患者分为1组（G1），未生长的青少年患者分为2组（G2）。G1组16例，G2组14例，治疗开始时平均年龄分别为13.2岁和27.8岁。比较治疗前和治疗后的头颅测量值和变化，并分析这些测量值之间的相关性。结果：下颌平面角明显减小(P)结论：TAI是一种有效的治疗方案，可以改善嵴后轮廓。青少年组明显比成人组有更大的前后骨骼改善和轮廓改变。

{"title":"Comparison of the effects of total arch intrusion treatment in adolescents and adults: A pilot study","authors":"Hye-Young Sim , Jung-Sub An , Min-Ho Jung","doi":"10.1016/j.ajodo.2025.05.010","DOIUrl":"10.1016/j.ajodo.2025.05.010","url":null,"abstract":"<div><h3>Introduction</h3><div>This study aimed to examine the effectiveness of total arch intrusion (TAI) treatment in patients with skeletal Class II malocclusion with retruded mandible and compare the treatment changes between adolescents and adults.</div></div><div><h3>Methods</h3><div>We retrospectively analyzed cephalometric radiographs of 30 patients who underwent TAI using miniscrews. Growing adolescent patients were classified as group 1 (G1), whereas nongrowing patients were classified as group 2 (G2). There were 16 patients in G1 and 14 in G2, and the average ages at the start of treatment were 13.2 years and 27.8 years, respectively. Pretreatment and posttreatment cephalometric measurements and changes were compared, and the correlation among these measurements was analyzed.</div></div><div><h3>Results</h3><div>Significant decreases were observed in mandibular plane angle (<em>P</em> <0.001); however, no significant difference was observed between the 2 groups. There was a significantly greater increase in SNB (<em>P</em> <0.05) and facial height ratio (<em>P</em> <0.01) and a decrease in ANB (<em>P</em> <0.01) in G1. The pogonion to nasion perpendicular line increased more in G1 (5.11 mm) than in G2 (3.88 mm), but this difference was not statistical significant. In correlation analysis, the mandibular plane rotation had a strong correlation with changes in Pog to N perp in G1, but there was a weak correlation in G2.</div></div><div><h3>Conclusions</h3><div>TAI was an effective treatment option to improve the retrognathic profile. The adolescent group showed significantly greater anteroposterior skeletal improvement and profile changes than the adult group with TAI.</div></div>","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"168 5","pages":"Pages 589-597"},"PeriodicalIF":3.0,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144994452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Directory: AAO Officers and Organizations 目录：AAO官员和组织

IF 3 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

American Journal of Orthodontics and Dentofacial Orthopedics

Pub Date : 2025-11-01 DOI: 10.1016/S0889-5406(25)00414-7

引用次数: 0

Mitigation of aerosol particles during composite attachment removal 复合材料附着物去除过程中气溶胶颗粒的减缓。

IF 3 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

American Journal of Orthodontics and Dentofacial Orthopedics

Pub Date : 2025-11-01 DOI: 10.1016/j.ajodo.2025.05.007

Erin Yoshida , Sepehr Makhsous , Lloyd Mancl , Bobby Cohanim , Igor Novosselov , Geoffrey Greenlee , Greg Huang

Introduction

This study aimed to determine which strategies most effectively reduce aerosolized particles when removing orthodontic composite attachments.

Methods

A network of AeroSpec portable particle monitors was employed to record particulate data in real-time. Sixteen sensors were placed in a 3-dimensional grid system around an operatory at the University of Washington Orthodontics Department. Composite attachments (Transbond LR; 3M, St Paul, Minn) were removed from the anterior 6 teeth of maxillary and mandibular resin models. Particulate matter of optical diameter ≤2.5 μm (PM_2.5) was measured. Three different high-speed handpieces were tested: conventional air-driven (StarDental; DentalEZ, Malvern, Pa), electric (BienAir, Bienne, Switzerland), and air-free (Medidenta, Las Vegas, Nev). Four different suction conditions were tested with each handpiece: none, high-speed intraoral suction (IOS), extraoral suction (EOS), and both together. Four repetitions with each variant were performed. Linear regression was used to compare average and maximum particle concentration by suction and handpiece.

Results

The highest concentration of particles was observed around the operator and decreased farther from the source of composite removal. Linear regression for the main effect of handpiece type indicated lower PM_2.5 when electric or air-free handpieces were used compared with the conventional handpieces. Linear regression for the main effect of suction showed significant reductions when any suction was used compared with none. The simultaneous use of both IOS and EOS resulted in the greatest reduction in PM_2.5.

Conclusions

Using an air-free or electric handpiece, along with simultaneous use of IOS and EOS, reduced the mean particle concentrations by 87% and 86% and the maximum particle concentrations by 92% and 94% near the operator, compared with a conventional handpiece and no suction.

简介：本研究旨在确定哪种策略在去除正畸复合附着体时最有效地减少雾化颗粒。方法：采用AeroSpec便携式颗粒监测仪网络实时记录颗粒数据。16个传感器被放置在华盛顿大学正畸科手术室周围的一个三维网格系统中。复合附件(Transbond LR；3M, St Paul, minnesota)从上颌和下颌树脂模型的前6颗牙中取出。测量光学直径≤2.5 μm的颗粒物（PM2.5）。测试了三种不同的高速手机：传统的空气驱动(StarDental；DentalEZ, Malvern, Pa), electric (BienAir, Bienne, Switzerland), air-free （meddenta, Las Vegas, nevada）。每个手机分别测试了四种不同的吸痰条件：无吸痰、高速口内吸痰（IOS）、口外吸痰（EOS）和同时吸痰。每种变异重复4次。采用线性回归法比较吸力法和手持法的平均浓度和最大浓度。结果：操作人员周围颗粒浓度最高，离复合去除源越远颗粒浓度越低。对手机类型主效应的线性回归表明，与传统手机相比，使用电动手机或无空气手机时PM2.5较低。对吸力的主要影响的线性回归显示，与不使用吸力相比，使用任何吸力时显著降低。同时使用IOS和EOS， PM2.5下降幅度最大。结论：与常规机头和无吸力相比，使用无空气机头或电动机头，同时使用IOS和EOS，可使操作者附近的平均颗粒浓度降低87%和86%，最大颗粒浓度降低92%和94%。

{"title":"Mitigation of aerosol particles during composite attachment removal","authors":"Erin Yoshida , Sepehr Makhsous , Lloyd Mancl , Bobby Cohanim , Igor Novosselov , Geoffrey Greenlee , Greg Huang","doi":"10.1016/j.ajodo.2025.05.007","DOIUrl":"10.1016/j.ajodo.2025.05.007","url":null,"abstract":"<div><h3>Introduction</h3><div>This study aimed to determine which strategies most effectively reduce aerosolized particles when removing orthodontic composite attachments.</div></div><div><h3>Methods</h3><div>A network of AeroSpec portable particle monitors was employed to record particulate data in real-time. Sixteen sensors were placed in a 3-dimensional grid system around an operatory at the University of Washington Orthodontics Department. Composite attachments (Transbond LR; 3M, St Paul, Minn) were removed from the anterior 6 teeth of maxillary and mandibular resin models. Particulate matter of optical diameter ≤2.5 μm (PM<sub>2.5</sub>) was measured. Three different high-speed handpieces were tested: conventional air-driven (StarDental; DentalEZ, Malvern, Pa), electric (BienAir, Bienne, Switzerland), and air-free (Medidenta, Las Vegas, Nev). Four different suction conditions were tested with each handpiece: none, high-speed intraoral suction (IOS), extraoral suction (EOS), and both together. Four repetitions with each variant were performed. Linear regression was used to compare average and maximum particle concentration by suction and handpiece.</div></div><div><h3>Results</h3><div>The highest concentration of particles was observed around the operator and decreased farther from the source of composite removal. Linear regression for the main effect of handpiece type indicated lower PM<sub>2.5</sub> when electric or air-free handpieces were used compared with the conventional handpieces. Linear regression for the main effect of suction showed significant reductions when any suction was used compared with none. The simultaneous use of both IOS and EOS resulted in the greatest reduction in PM<sub>2.5</sub>.</div></div><div><h3>Conclusions</h3><div>Using an air-free or electric handpiece, along with simultaneous use of IOS and EOS, reduced the mean particle concentrations by 87% and 86% and the maximum particle concentrations by 92% and 94% near the operator, compared with a conventional handpiece and no suction.</div></div>","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"168 5","pages":"Pages 563-578.e4"},"PeriodicalIF":3.0,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144838491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Effects of maxillary protraction with an orthopedic facemask on fricatives 矫形面罩颌前伸对磨擦的影响。

IF 3 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

American Journal of Orthodontics and Dentofacial Orthopedics

Pub Date : 2025-11-01 DOI: 10.1016/j.ajodo.2025.07.011

Gokhan Coban , Nisa Gul Amuk , Beyza Nur Dukar , Hatice Feyza Konca , Nizami Hashimli , Taner Ozturk

Introduction

This prospective cohort study aimed to investigate the effect of rapid maxillary expansion (RME) and orthopedic facemask (FM) treatment on the acoustic properties of fricative sounds (/s/ and /ʃ/) through objective and subjective (perceptual) assessments.

Methods

Twenty-two patients (7 females and 15 males; mean age: 11.27 ± 1.38 years) underwent speech recordings at 4 time points: immediately before RME (T0), 2 weeks later (immediately before FM application, T1), 3 months later (T2), and 1 week after treatment (T3). Speech therapists recorded the data and conducted acoustic analyses using Praat software. Acoustic parameters—duration, spectral peak, center of gravity, and second formant transition—were analyzed for /s/ and /ʃ/ in monosyllabic words with /a/, /u/, and /ı/ vowels in both word-initial and word-final positions. Data were statistically analyzed using repeated measures analysis of variance and the Friedman test. Cephalometric radiographs were taken at T0 and T3.

Results

After RME and FM therapy, duration decreased significantly in the word-initial positions of /s/ and /ʃ/ (P = 0.002). Spectral peaks decreased significantly in the word-initial and word-final positions during treatment for both /s/ (P <0.001) and /ʃ/ (P = 0.007), returning to baseline by T3. However, a significant overall decrease persisted (P <0.001). Center of gravity also decreased significantly during treatment (P <0.05), whereas second formant transition values did not change. A perceptual evaluation revealed high articulation accuracy (2.00) at T0 for all evaluations, a significant decrease at T2 with increased scores (3.65 for /s/ and /ʃ/ total, 4.00 for overall intelligibility, P <0.001), and a subsequent improvement at T3 (1.33 for all evaluations, P <0.001), with scores significantly lower than at T0 (P <0.001).

Conclusions

RME and FM therapy led to favorable structural and phonetic changes. Improvements in acoustic properties and perceptual scores suggest effective adaptation and enhanced articulation after treatment.

本前瞻性队列研究旨在通过客观和主观（知觉）评估探讨快速上颌扩张（RME）和矫形面罩（FM）治疗对摩擦音（/s/和/ h /）声学特性的影响。方法：22例患者（女性7例，男性15例，平均年龄11.27±1.38岁）分别在RME前（T0）、2周后（FM应用前，T1）、3个月后（T2）、治疗后1周（T3） 4个时间点进行语音录音。语言治疗师记录数据并使用Praat软件进行声学分析。声学参数——持续时间、谱峰、重心和第二形成峰过渡——分析了在单词起始和词尾位置都有/a/、/u/和/ yi /元音的单音节单词中的/s/和/ h /。采用重复测量方差分析和Friedman检验对数据进行统计分析。在T0和T3时拍摄头颅x线片。结果：RME和FM治疗后，/s/和/ h /的单词起始位置持续时间显著缩短（P = 0.002）。结论：RME和FM治疗可使语音结构和语音发生良好的变化。声学特性和感知评分的改善表明治疗后有效的适应和增强的发音。

{"title":"Effects of maxillary protraction with an orthopedic facemask on fricatives","authors":"Gokhan Coban , Nisa Gul Amuk , Beyza Nur Dukar , Hatice Feyza Konca , Nizami Hashimli , Taner Ozturk","doi":"10.1016/j.ajodo.2025.07.011","DOIUrl":"10.1016/j.ajodo.2025.07.011","url":null,"abstract":"<div><h3>Introduction</h3><div>This prospective cohort study aimed to investigate the effect of rapid maxillary expansion (RME) and orthopedic facemask (FM) treatment on the acoustic properties of fricative sounds (/s/ and /ʃ/) through objective and subjective (perceptual) assessments.</div></div><div><h3>Methods</h3><div>Twenty-two patients (7 females and 15 males; mean age: 11.27 ± 1.38 years) underwent speech recordings at 4 time points: immediately before RME (T0), 2 weeks later (immediately before FM application, T1), 3 months later (T2), and 1 week after treatment (T3). Speech therapists recorded the data and conducted acoustic analyses using Praat software. Acoustic parameters—duration, spectral peak, center of gravity, and second formant transition—were analyzed for /s/ and /ʃ/ in monosyllabic words with /a/, /u/, and /ı/ vowels in both word-initial and word-final positions. Data were statistically analyzed using repeated measures analysis of variance and the Friedman test. Cephalometric radiographs were taken at T0 and T3.</div></div><div><h3>Results</h3><div>After RME and FM therapy, duration decreased significantly in the word-initial positions of /s/ and /ʃ/ (<em>P</em> = 0.002). Spectral peaks decreased significantly in the word-initial and word-final positions during treatment for both /s/ (<em>P</em> <0.001) and /ʃ/ (<em>P</em> = 0.007), returning to baseline by T3. However, a significant overall decrease persisted (<em>P</em> <0.001). Center of gravity also decreased significantly during treatment (<em>P</em> <0.05), whereas second formant transition values did not change. A perceptual evaluation revealed high articulation accuracy (2.00) at T0 for all evaluations, a significant decrease at T2 with increased scores (3.65 for /s/ and /ʃ/ total, 4.00 for overall intelligibility, <em>P</em> <0.001), and a subsequent improvement at T3 (1.33 for all evaluations, <em>P</em> <0.001), with scores significantly lower than at T0 (<em>P</em> <0.001).</div></div><div><h3>Conclusions</h3><div>RME and FM therapy led to favorable structural and phonetic changes. Improvements in acoustic properties and perceptual scores suggest effective adaptation and enhanced articulation after treatment.</div></div>","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"168 5","pages":"Pages 608-619"},"PeriodicalIF":3.0,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145087847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Is the cervical vertebral maturation method a reliable predictor of midpalatal suture maturation? A retrospective study 颈椎成熟度法是中腭缝合成熟度的可靠预测指标吗？回顾性研究。

IF 3 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

American Journal of Orthodontics and Dentofacial Orthopedics

Pub Date : 2025-11-01 DOI: 10.1016/j.ajodo.2025.07.009

Davide Brilli , Federica Altieri , Martina Mezio , Michele Cassetta

Introduction

The study aimed to assess the correlations among chronological age, cervical vertebral maturation (CVM), midpalatal suture (MPS) maturation, and MPS density (MPSD), and to evaluate the association between the CVM and MPS.

Methods

Records derived from the analysis of lateral cephalometric radiographs and cone-beam computed tomography scans of 200 subjects, grouped by sex, were used to determine CVM, MPS, and MPSD ratio. Statistical analysis included descriptive statistics. Spearman correlation and positive likelihood ratio were used to determine the possible correlations.

Results

In males, strong correlations were observed between CVM stage (CS) and age (r = 0.864), CVM and MPS stage (r = 0.826). Moderate correlation was found between CS and MPSD ratio (r = 0.488). Strong correlations were found between MPS stages and age (r = 0.729) and MPSD ratio (r = 0.622). Among females, strong correlations appeared between CVM and age (r = 0.872), between CS and MPS stage (r = 0.899), and between CVM and MPSD ratio (r = 0.618). Further strong correlations were found between MPS stages and age (r = 0.8), and between MPS stages and MPSD (r = 0.716). In both sexes, the positive likelihood ratio test demonstrated strong associations between CS1 and stage A, CS5 and stage D, and CS6 and stage E.

Conclusions

Significant correlations exist between chronological age, CVM, MPS, and MPSD. The CVM method demonstrated a high predictive value in identifying stages A, D, and E. The CVM method could be considered as a decision-making indicator in crossbite treatment; however, it should be confirmed by further prospective studies.

前言：本研究旨在评估实足年龄、颈椎成熟度（CVM）、中腭缝合（MPS）成熟度和MPS密度（MPSD）之间的相关性，并评估CVM与MPS之间的关系。方法：分析200名受试者的侧位头颅x线片和锥束计算机断层扫描记录，按性别分组，确定CVM， MPS和MPSD比率。统计分析包括描述性统计。采用Spearman相关和正似然比确定可能的相关性。结果：男性CVM分期与年龄（r = 0.864）、CVM分期与MPS分期（r = 0.826）有较强相关性。CS与MPSD比值呈正相关（r = 0.488）。MPS分期与年龄（r = 0.729）及MPSD比值（r = 0.622）有较强的相关性。在女性中，CVM与年龄（r = 0.872）、CS与MPS分期（r = 0.899）、CVM与MPSD比值（r = 0.618）有较强的相关性。进一步发现MPS分期与年龄（r = 0.8）、MPS分期与MPSD （r = 0.716）之间存在强相关性。在两性中，正似然比检验显示CS1与A期、CS5与D期、CS6与e期之间存在较强的相关性。结论：实足年龄、CVM、MPS和MPSD之间存在显著相关性。CVM方法对a、D、e期有较高的预测价值，可作为牙合治疗的决策指标；然而，这需要进一步的前瞻性研究来证实。

{"title":"Is the cervical vertebral maturation method a reliable predictor of midpalatal suture maturation? A retrospective study","authors":"Davide Brilli , Federica Altieri , Martina Mezio , Michele Cassetta","doi":"10.1016/j.ajodo.2025.07.009","DOIUrl":"10.1016/j.ajodo.2025.07.009","url":null,"abstract":"<div><h3>Introduction</h3><div>The study aimed to assess the correlations among chronological age, cervical vertebral maturation (CVM), midpalatal suture (MPS) maturation, and MPS density (MPSD), and to evaluate the association between the CVM and MPS.</div></div><div><h3>Methods</h3><div>Records derived from the analysis of lateral cephalometric radiographs and cone-beam computed tomography scans of 200 subjects, grouped by sex, were used to determine CVM, MPS, and MPSD ratio. Statistical analysis included descriptive statistics. Spearman correlation and positive likelihood ratio were used to determine the possible correlations.</div></div><div><h3>Results</h3><div>In males, strong correlations were observed between CVM stage (CS) and age (<em>r</em> = 0.864), CVM and MPS stage (<em>r</em> = 0.826). Moderate correlation was found between CS and MPSD ratio (<em>r</em> = 0.488). Strong correlations were found between MPS stages and age (<em>r</em> = 0.729) and MPSD ratio (<em>r</em> = 0.622). Among females, strong correlations appeared between CVM and age (<em>r</em> = 0.872), between CS and MPS stage (<em>r</em> = 0.899), and between CVM and MPSD ratio (<em>r</em> = 0.618). Further strong correlations were found between MPS stages and age (<em>r</em> = 0.8), and between MPS stages and MPSD (<em>r</em> = 0.716). In both sexes, the positive likelihood ratio test demonstrated strong associations between CS1 and stage A, CS5 and stage D, and CS6 and stage E.</div></div><div><h3>Conclusions</h3><div>Significant correlations exist between chronological age, CVM, MPS, and MPSD. The CVM method demonstrated a high predictive value in identifying stages A, D, and E. The CVM method could be considered as a decision-making indicator in crossbite treatment; however, it should be confirmed by further prospective studies.</div></div>","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"168 5","pages":"Pages 598-607"},"PeriodicalIF":3.0,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145042074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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