Three-dimensional comparative evaluation of articular disc position and other temporomandibular joint morphology in Class II horizontal and vertical cases with Class I malocclusion: A magnetic resonance imaging study

被引:23
作者
John, Zynul Ali Sirsmith [1 ]
Shrivastav, Sunita S. [1 ]
Kamble, Ranjit [1 ]
Jaiswal, Eshita [1 ]
Dhande, Rajasbala [2 ]
机构
[1] Sharad Pawar Dent Coll, Dept Orthodont & Dentofacial Orthoped, Wardha, Maharashtra, India
[2] Datta Meghe Inst Med Sci, Dept Radiodiag, Wardha, Maharashtra, India
关键词
Temporomandibular joint; Magnetic resonance imaging; TMD; Malocclusion; Orthodontics; CONDYLE;
D O I
10.2319/121519-801.1
中图分类号
R78 [口腔科学];
学科分类号
1003 ;
摘要
Objective: To evaluate and compare articular disk position, condylar position, and joint spaces in Class II vertical, Class II horizontal, and Class I cases. The purpose was to assess the potential for development of temporomandibular disorders (TMDs) in the three groups. Materials and Methods: A sample of 75 cases, 25 cases in each group of Class I, Class II vertical, and Class II horizontal, were selected based on inclusion and exclusion criteria. Magnetic resonance imaging (MRI) assessments were made with a 1.5-Tesla basic system with a closed-mouth technique for evaluating articular disk position in the sagittal and transverse planes, condylar position, and joint spaces in the sagittal plane. Philips 3.0 software was used to analyze the MR images. Results: There was evidence of alterations in the temporomandibular joint (TMJ) morphology in both Class II vertical and Class II horizontal cases, with maximum discrepancy in Class II vertical cases. MRI evaluation suggested a tendency for antero-medial disk displacement with anteriorly positioned condyles in Class II vertical cases. The discrepancy was milder in the Class II horizontal group. Conclusions: Class II vertical cases are more susceptible to the development of TMDs and should be subjected to TMJ evaluation before starting any orthodontic treatment to intercept and prevent a mild asymptomatic TMD from developing into a more severe form. Class II vertical cases should be subjected to MRI evaluation before starting any orthodontic treatment.
引用
收藏
页码:707 / 714
页数:8
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