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Updated: Dec 22, 2025

A Morphometric and Cellular Analysis Method for the Murine Mandibular Condyle

A Morphometric and Cellular Analysis Method for the Murine Mandibular Condyle

Published on: January 11, 2018

Does TMJ Function and Imaging Tools Help Differentiate Between Condylar Resorption and Mandibular Hypoplasia?

Harutsugi Abukawa¹, Takashi Ogawa², Masahiko Kobayashi³

¹Associate Professor, Division of Oral and Maxillofacial Surgery, Department of Diagnostic and Therapeutic Sciences, Meikai University School of Dentistry, Saitama, Japan.

Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons

|May 11, 2020

Summary

Temporomandibular joint (TMJ) dysfunction and mandibular plane angle (MPA) can help differentiate condylar resorption (CR) from mandibular hypoplasia (MH). This study clarifies diagnostic imaging tools for CR.

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A Morphometric and Cellular Analysis Method for the Murine Mandibular Condyle

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Area of Science:

Dentistry
Orthodontics
Radiology

Background:

Differentiating bilateral condylar resorption (CR) from mandibular hypoplasia (MH) is diagnostically challenging.
Standardized measurements and chronological observation are often difficult to establish for CR and MH.

Purpose of the Study:

To assess if temporomandibular joint (TMJ) function can distinguish between CR and MH.
To identify essential diagnostic imaging tools for CR.

Main Methods:

A cross-sectional study involving patients with mandibular retrognathia.
Assessed TMJ function using the Helkimo clinical dysfunction index and mandibular plane angle (MPA) via cephalometric analysis.
Utilized panoramic radiography, computed tomography, and magnetic resonance imaging for condylar height (CH) and cortical erosion assessment.

Main Results:

The CR group exhibited a significantly higher average TMJ clinical dysfunction score (4.4) compared to the MH group (0.4).
The CR group also showed a significantly higher average MPA (41.2°) than the MH group (35.5°).

Conclusions:

Temporomandibular joint (TMJ) function assessment is a valuable tool for differentiating CR from MH.
Mandibular plane angle (MPA) analysis via cephalometric radiography aids in distinguishing between CR and MH.