American Journal of Orthodontics and Dentofacial Orthopedics最新文献

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Information for readers 读者须知

IF 2.7 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

American Journal of Orthodontics and Dentofacial Orthopedics

Pub Date : 2024-08-01 DOI: 10.1016/S0889-5406(24)00255-5

引用次数: 0

Authors’ response 作者回复。

IF 2.7 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

American Journal of Orthodontics and Dentofacial Orthopedics

Pub Date : 2024-08-01 DOI: 10.1016/j.ajodo.2024.05.006

引用次数: 0

On being an informant 关于线人

IF 2.7 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

American Journal of Orthodontics and Dentofacial Orthopedics

Pub Date : 2024-08-01 DOI: 10.1016/j.ajodo.2024.05.001

引用次数: 0

Measurement plane of the cross-sectional area of the masseter muscle in patients with skeletal Class III malocclusion: An artificial intelligence model 骨骼Ⅲ类错颌畸形患者的颌间肌横截面积测量平面：人工智能模型

IF 2.7 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

American Journal of Orthodontics and Dentofacial Orthopedics

Pub Date : 2024-08-01 DOI: 10.1016/j.ajodo.2024.03.011

Introduction

This study aimed to determine a measurement plane that could represent the maximum cross-sectional area (MCSA) of masseter muscle using an artificial intelligence model for patients with skeletal Class III malocclusion.

Methods

The study included 197 patients, divided into subgroups according to sex, mandibular symmetry, and mandibular plane angle. The volume, MCSA, and the cross-sectional area (CSA) at different levels were calculated automatically. The vertical distance between MCSA and mandibular foramen, along with the ratio of the masseter CSA at different levels to the MCSA (R), were also calculated.

Results

The MCSA and volume showed a strong correlation in the total sample and each subgroup (P <0.001). The correlation between the CSA at each level and MCSA was statistically significant (P <0.001). The peak of the r and the correlation coefficient between the CSA at different levels and MCSA were mostly present 5-10 mm above the mandibular foramen for the total sample and the subgroups. The mean of R_A5 to R_A10 was >0.93, whereas the corresponding correlation coefficient was >0.96, both for the entire sample and for the subgroups.

Conclusions

MCSA could be used as an indicator for masseter muscle size. For patients with skeletal Class III malocclusion, the CSA 5-10 mm above the mandibular foramen, parallel to the Frankfort plane, could be used to estimate the masseter muscle MCSA.

引言本研究旨在利用人工智能模型为骨骼Ⅲ类错颌畸形患者确定一个能代表颌间肌最大横截面积（MCSA）的测量平面：研究包括 197 名患者，根据性别、下颌对称性和下颌平面角度分为若干亚组。自动计算不同水平的体积、MCSA 和横截面积（CSA）。此外，还计算了MCSA与下颌孔之间的垂直距离，以及不同水平的咀嚼肌CSA与MCSA的比值（R）：结果：在全部样本和每个亚组中，MCSA 和体积均显示出很强的相关性（P A5 至 RA10 均大于 0.93，而全部样本和亚组的相应相关系数均大于 0.96）：结论：MCSA可作为衡量颌面部肌肉大小的指标。对于骨骼Ⅲ类错颌畸形患者，下颌孔上方5-10毫米、平行于法兰克福平面的CSA可用于估算颌间肌MCSA。

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引用次数: 0

Treatment duration by morphology and location of impacted maxillary canines: A cone-beam computed tomography investigation 根据上颌阻生犬齿的形态和位置确定治疗时间：锥形束计算机断层扫描研究。

IF 2.7 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

American Journal of Orthodontics and Dentofacial Orthopedics

Pub Date : 2024-08-01 DOI: 10.1016/j.ajodo.2024.04.010

Introduction

This study aimed to identify whether patients with impacted maxillary canines take longer to treat than orthodontic patients without an impacted canine. We also sought to identify factors that are predictive of increased treatment duration in patients with impacted maxillary canines and treated by surgical exposure.

Methods

A retrospective investigation of 37 patients with an impacted maxillary canine, treated by surgical exposure and fixed appliance therapy, was undertaken. In addition, an age- and sex-matched control group of 39 patients (without impacted canines) was also collected. Patient age, sex, and total treatment duration were recorded. For patients with an impacted canine, patient records and pretreatment cone-beam computed tomography datasets were assessed. Point coordinates identifying relevant landmarks were recorded, and a geometric method was used to calculate variables describing canine location, orientation, and apical morphology.

Results

Controlling for age and sex, linear regression identified a statistically significant increase in treatment duration of 46.7 and 41.5 weeks for palatal and labial/midalveolar impacted canines, respectively, vs controls (P <0.002). Age and sex of patients with impacted canines collectively affected treatment duration (P = 0.04), with females of increased age being treated faster than younger males. Rotation of the impacted canine crown had a highly significant effect on treatment duration, with every degree of rotation increasing treatment duration by 0.32 weeks (P <0.001). There was a significant degree of multicollinearity between the other radiographic variables. Collectively, radiographic variables describing canine displacement significantly prolonged treatment duration (P <0.001) and explained 29.8% of the variability in total treatment time. The apical morphology of impacted maxillary canines was significantly associated with increased treatment duration (P = 0.01) and explained 11.3% of the overall treatment variability (P = 0.01).

Conclusions

Increased total treatment duration of surgically exposed impacted maxillary canines is associated with increasing mesiopalatal canine crown rotation, worsening displacement, and hooked apical morphology.

简介本研究旨在确定上颌犬齿撞击患者的治疗时间是否长于无犬齿撞击的正畸患者。我们还试图确定哪些因素会导致上颌犬齿撞击并接受手术暴露治疗的患者的治疗时间延长：方法：我们对 37 名通过手术暴露和固定矫治器治疗的上颌犬齿撞击患者进行了回顾性调查。此外，还收集了 39 名年龄和性别匹配的对照组患者（无撞击性犬齿）。记录了患者的年龄、性别和总治疗时间。对于有撞击性犬齿的患者，对患者记录和治疗前锥形束计算机断层扫描数据集进行了评估。记录识别相关地标的点坐标，并使用几何方法计算描述犬齿位置、方向和根尖形态的变量：结果：在控制年龄和性别的情况下，线性回归结果表明，与对照组相比，腭侧和唇侧/潮间带阻生犬齿的治疗时间分别增加了 46.7 周和 41.5 周，具有统计学意义（P 结论：腭侧和唇侧/潮间带阻生犬齿的治疗时间分别增加了 46.7 周和 41.5 周：手术暴露的上颌撞击性犬齿总治疗时间的延长与中腭侧犬齿牙冠旋转增加、移位恶化和根尖形态呈钩状有关。

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引用次数: 0

Queries regarding long-term evaluation of soft-tissue changes after miniscrew-assisted and conventional rapid palatal expansion using voxel-based superimposition of cone-beam computed tomography scans 使用基于体素的锥形束计算机断层扫描叠加法对微型螺钉辅助和传统快速腭扩张术后软组织变化进行长期评估的疑问。

IF 2.7 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

American Journal of Orthodontics and Dentofacial Orthopedics

Pub Date : 2024-08-01 DOI: 10.1016/j.ajodo.2024.04.007

引用次数: 0

Authors’ response 作者回复。

IF 2.7 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

American Journal of Orthodontics and Dentofacial Orthopedics

Pub Date : 2024-08-01 DOI: 10.1016/j.ajodo.2024.05.008

引用次数: 0

That which makes us human 是它让我们成为人类。

IF 2.7 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

American Journal of Orthodontics and Dentofacial Orthopedics

Pub Date : 2024-08-01 DOI: 10.1016/j.ajodo.2024.05.002

引用次数: 0

Designing an artificial intelligence system for dental occlusion classification using intraoral photographs: A comparative analysis between artificial intelligence-based and clinical diagnoses 利用口内照片设计用于牙齿咬合分类的人工智能系统：基于人工智能的诊断与临床诊断的比较分析。

IF 2.7 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

American Journal of Orthodontics and Dentofacial Orthopedics

Pub Date : 2024-08-01 DOI: 10.1016/j.ajodo.2024.03.012

Introduction

This study aimed to design an artificial intelligence (AI) system for dental occlusion classification using intraoral photographs. Moreover, the performance of this system was compared with that of an expert clinician.

Methods

This study included 948 adult patients with permanent dentition who presented to the Department of Orthodontics, School of Dentistry, Mashhad University of Medical Sciences, during 2022-2023. The intraoral photographs taken from the patients in left, right, and frontal views (3 photographs for each patient) were collected and underwent augmentation, and about 7500 final photographs were obtained. Moreover, the patients were clinically examined by an expert orthodontist for malocclusion, overjet, and overbite and were classified into 6 groups: Class I, Class II, half-cusp Class II, Super Class I, Class III, and unclassifiable. In addition, a multistage neural network system was created and trained using the photographs of 700 patients. Then, it was used to classify the remaining 248 patients using their intraoral photographs. Finally, its performance was compared with that of the expert clinician. All statistical analyses were performed using the Stata software (version 17; Stata Corp, College Station, Tex).

Results

The accuracy, precision, recall, and F1 score of the AI system in the malocclusion classification of molars were calculated to be 93.1%, 88.6%, 91.2%, and 89.7%, respectively, whereas the AI system had an accuracy, precision, recall, and F1 score of 89.1%, 88.8%, 91.42%, and 89.8% for malocclusion classification of canines, respectively. Moreover, the mean absolute error of the AI system accuracy was 1.98 ± 2.11 for overjet and 1.28 ± 1.60 for overbite classifications.

Conclusions

AI exhibited remarkable performance in detecting all classes of malocclusion, which was higher than that of orthodontists, especially in predicting angle classification. However, its performance was not acceptable in overjet and overbite measurement compared with expert orthodontists.

简介本研究旨在设计一种人工智能（AI）系统，利用口内照片进行牙齿咬合分类。此外，还将该系统的性能与临床专家的性能进行了比较：研究对象包括 2022-2023 年期间在马什哈德医科大学牙科学院正畸系就诊的 948 名恒牙期成年患者。收集了患者左、右和正面的口内照片（每位患者 3 张），并对照片进行了扩增，最终获得了约 7500 张照片。此外，正畸专家对患者进行了错颌、过咬合和咬合不正的临床检查，并将患者分为 6 组：I 类、II 类、半尖牙 II 类、超 I 类、III 类和无法分类。此外，还利用 700 名患者的照片创建并训练了多级神经网络系统。然后，该系统利用其余 248 名患者的口内照片对其进行分类。最后，将该系统的性能与临床专家的性能进行了比较。所有统计分析均使用 Stata 软件（版本 17；Stata Corp，College Station，Tex）进行：经计算，人工智能系统对磨牙错颌畸形分类的准确率、精确度、召回率和 F1 分数分别为 93.1%、88.6%、91.2% 和 89.7%，而人工智能系统对犬齿错颌畸形分类的准确率、精确度、召回率和 F1 分数分别为 89.1%、88.8%、91.42% 和 89.8%。此外，人工智能系统对过咬合和过咬合分类的平均绝对误差分别为 1.98 ± 2.11 和 1.28 ± 1.60：人工智能在检测各类错颌畸形方面表现突出，高于正畸医生，尤其是在预测角度分类方面。然而，与正畸专家相比，人工智能在过咬合和过咬合测量方面的表现不尽如人意。

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引用次数: 0

Near-infrared imaging in orthodontic intraoral scanners for early interproximal caries detection 正畸口内扫描仪中的近红外成像技术用于早期牙髓间龋检测。

IF 2.7 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

American Journal of Orthodontics and Dentofacial Orthopedics

Pub Date : 2024-08-01 DOI: 10.1016/j.ajodo.2024.03.013

Introduction

Intraoral scanners commonly used in orthodontic offices now offer near-infrared imaging (NIRI) technology, advertised as a screening tool to identify interproximal caries. This study aimed to evaluate the reliability and validity of NIRI detection of interproximal carious lesions in a common intraoral scanner (iTero Element 5D; Align Technology, San Jose, Calif) with and without bitewing radiograph complement, compared with a microcomputed tomography (micro-CT) reference standard.

Methods

Extracted human posterior teeth (premolars and molars) were selected for early (noncavitated) interproximal carious lesions (n = 39) and sound control surfaces (n = 47). The teeth were scanned via micro-CT for evaluation by 2 blinded evaluators using consensus scoring. The teeth were mounted to simulate anatomic interproximal contacts and underwent a NIRI scan using iTero Element 5D and bitewing radiographs. Two trained, calibrated examiners independently evaluated (1) near-infrared images alone with clinical photograph, (2) bitewing radiograph alone with clinical photograph, and (3) near-infrared images with bitewing radiograph and clinical photograph in combination, after at least a 10-day washout period between each evaluation.

Results

Interrater reliability was highest for NIRI alone (k = 0.533) compared with bitewing radiograph alone (k = 0.176) or in combination (k = 0.256). NIRI alone showed high specificity (0.83-0.96) and moderate sensitivity (0.42-0.63) compared with a micro-CT reference standard. Dentin lesions were significantly more reliably detected than enamel lesions.

Conclusions

After rigorous training and calibration, NIRI can be used with moderate reliability, high specificity, and moderate sensitivity to detect noncavitated interproximal carious lesions.

简介：正畸诊室常用的口内扫描仪现在提供了近红外成像（NIRI）技术，该技术被宣传为一种筛查工具，可用于识别根尖间龋。本研究旨在评估近红外成像技术与微计算机断层扫描（micro-CT）参考标准相比，在有和没有咬翼X光片补充的情况下，使用普通口内扫描仪（iTero Element 5D; Align Technology, San Jose, Calif）检测近端龋病的可靠性和有效性：拔出的人类后牙（前臼齿和臼齿）被选作早期（非龋坏）近心面间龋坏（39 个）和健全控制面（47 个）。通过显微 CT 扫描牙齿，由两名盲人评估员采用共识评分法进行评估。安装牙齿以模拟解剖性近侧接触，并使用 iTero Element 5D 和咬翼X光片进行近红外成像扫描。两名训练有素、经过校准的检查员分别独立评估（1）单独的近红外图像和临床照片；（2）单独的咬翼X光片和临床照片；（3）近红外图像、咬翼X光片和临床照片，每次评估之间至少间隔 10 天：单独使用近红外成像（k = 0.533）与单独使用咬翼X光片（k = 0.176）或组合使用近红外成像（k = 0.256）相比，相互之间的可靠性最高。与显微 CT 参考标准相比，单独使用近红外成像的特异性较高（0.83-0.96），灵敏度适中（0.42-0.63）。牙本质病变的检测可靠性明显高于釉质病变：经过严格的培训和校准后，近红外成像可以以中等的可靠性、高特异性和中等灵敏度检测非凹陷性近侧龋病变。

{"title":"Near-infrared imaging in orthodontic intraoral scanners for early interproximal caries detection","authors":"","doi":"10.1016/j.ajodo.2024.03.013","DOIUrl":"10.1016/j.ajodo.2024.03.013","url":null,"abstract":"<div><h3>Introduction</h3><p><span><span>Intraoral scanners commonly used in </span>orthodontic offices now offer near-infrared imaging (NIRI) technology, advertised as a screening tool to identify interproximal caries. This study aimed to evaluate the reliability and validity of NIRI detection of interproximal carious lesions in a common intraoral scanner (iTero Element 5D; Align Technology, San Jose, Calif) with and without bitewing radiograph complement, compared with a </span>microcomputed tomography (micro-CT) reference standard.</p></div><div><h3>Methods</h3><p>Extracted human posterior teeth<span> (premolars and molars) were selected for early (noncavitated) interproximal carious lesions (n = 39) and sound control surfaces (n = 47). The teeth were scanned via micro-CT for evaluation by 2 blinded evaluators using consensus scoring. The teeth were mounted to simulate anatomic interproximal contacts and underwent a NIRI scan using iTero Element 5D and bitewing radiographs. Two trained, calibrated examiners independently evaluated (1) near-infrared images alone with clinical photograph, (2) bitewing radiograph alone with clinical photograph, and (3) near-infrared images with bitewing radiograph and clinical photograph in combination, after at least a 10-day washout period between each evaluation.</span></p></div><div><h3>Results</h3><p>Interrater reliability was highest for NIRI alone (k = 0.533) compared with bitewing radiograph alone (k = 0.176) or in combination (k = 0.256). NIRI alone showed high specificity (0.83-0.96) and moderate sensitivity (0.42-0.63) compared with a micro-CT reference standard. Dentin lesions were significantly more reliably detected than enamel lesions.</p></div><div><h3>Conclusions</h3><p>After rigorous training and calibration, NIRI can be used with moderate reliability, high specificity, and moderate sensitivity to detect noncavitated interproximal carious lesions.</p></div>","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140899924","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}

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