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A Morphometric and Cellular Analysis Method for the Murine Mandibular Condyle
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Developing a universal and reliable temporomandibular joint reference system for quantifying morphological and

Bin Feng1, Qinxin Wu2, Jun Wang1

  • 1Department of Oral and Maxillofacial Radiology, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, No.166 Qiutao North Road, Shangcheng District, Hangzhou, Zhejiang Province 310000, China.

European Journal of Orthodontics
|October 12, 2023
PubMed
Summary
This summary is machine-generated.

A new temporomandibular joint (TMJ) reference system offers reliable quantification of TMJ changes using cone-beam computed tomography (CBCT). This universal system enhances comparability across studies for TMJ disorder assessments.

Keywords:
cone-beam computed tomographyimage registrationmandibular condyletemporomandibular joint

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Area of Science:

  • Dentistry
  • Radiology
  • Orthodontics

Background:

  • Accurate assessment of temporomandibular joint (TMJ) morphology and position is crucial for diagnosis and treatment.
  • Existing reference systems may lack universality or reliability, especially with varying cone-beam computed tomography (CBCT) field-of-view (FOV) data.

Purpose of the Study:

  • To develop and validate a universal and reliable reference system for quantifying TMJ morphological and positional changes.
  • To assess the applicability of this system across different CBCT FOVs.

Main Methods:

  • A TMJ-specific reference system, including a horizontal reference plane (TMJHP) and local coordinate system (TMJCS), was constructed using cranial base landmarks.
  • The system was evaluated using CBCT data from patients undergoing preorthognathic surgery (large FOV) and those treated for temporomandibular disorders (limited FOV).
  • Spatial relationships with standard planes (Frankfort horizontal plane - FHP) and coordinate systems (maxillofacial coordinate system - MFCS) were analyzed.

Main Results:

  • The TMJ-specific reference system demonstrated high reliability and parallelism with the FHP.
  • The TMJCS showed minimal deviations compared to the MFCS, indicating comparable accuracy.
  • Intraclass correlation coefficients (ICCs) for TMJCS construction and condylar measurements were consistently high (0.918-1.000), confirming reliability.

Conclusions:

  • A universal and reliable TMJ reference system was successfully developed and validated.
  • The system is applicable to both limited and large FOV CBCT, enhancing comparability in TMJ assessments.
  • This system facilitates comprehensive evaluations of TMJ changes during treatment and disease progression.