Related Experiment Video
Updated: Jun 12, 2026
08:07
A Morphometric and Cellular Analysis Method for the Murine Mandibular Condyle
Published on: January 11, 2018
Comparison between human and rat TMJ: anatomic and histopathologic features.
Gabriela Granja Porto1, Belmiro Cavalcanti do Egito Vasconcelos, Emanuel Sávio de Souza Andrade
1Department of Oral and Maxillofacial Surgery, UPE, Recife, PE, Brazil.
Acta Cirurgica Brasileira
|May 26, 2010
Summary
Normal rat temporomandibular joints (TMJ) share key anatomical and histological similarities with human TMJs, though rats lack an articular eminence. This study provides a comparative evaluation for research applications.
Area of Science:
- Comparative anatomy
- Histopathology
- Temporomandibular joint research
Background:
- The temporomandibular joint (TMJ) is crucial for mastication.
- Understanding TMJ anatomy in animal models is vital for research.
Purpose of the Study:
- To anatomically and histopathologically describe normal rat TMJs.
- To compare rat TMJ structure with human TMJ anatomy.
Main Methods:
- Histological evaluation of 12 rat TMJs (condyle, disc, temporal bone, retrodiscal tissue, synovia).
- Qualitative assessment of anatomical structures.
- Literature review for human TMJ macroscopical and microscopical data.
Main Results:
- Rat TMJs possess a thin fibrous capsule with synovial lining.
- The glenoid fossa is flat; mandibular angle is prominent.
- Histology reveals fibrocartilaginous disc, hyaline cartilage on condyle and temporal bone.
Conclusions:
- Rat TMJ morphology and histology are largely similar to humans.
- A significant difference is the absence of an articular eminence in rats.
