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The human temporo-mandibular joint: current anatomic and physiologic status
G Le Toux1, J M Duval, P Darnault
1Unité d'Odontologie Chirurgicale, UER Odontologie, Rennes, France.
Surgical and Radiologic Anatomy : SRA
|January 1, 1989
Summary
This study reviews temporo-mandibular joint anatomy and function. It suggests the masseter and temporalis muscles assist the lateral pterygoid in guiding the articular disc, a function present even in embryonic development.
Area of Science:
- Anatomy
- Physiology
- Embryology
Background:
- The temporo-mandibular joint (TMJ) is crucial for mastication and speech.
- Understanding TMJ biomechanics is essential for diagnosing and treating related disorders.
Purpose of the Study:
- To consolidate current knowledge on the anatomy and physiology of the human temporo-mandibular joint.
- To investigate the role of specific muscles in the guidance of the articular disc during TMJ movement.
Main Methods:
- Literature review of anatomical and physiological studies on the temporo-mandibular joint.
- Analysis of embryological data regarding TMJ development and muscle attachments.
Main Results:
- The lateral pterygoid muscle is recognized for its primary role in TMJ movements.
- Evidence suggests a supplementary role for the deep portion of the masseter and temporalis muscles in anterior articular disc guidance.
- Embryological findings show a triple muscle attachment (temporalis, pterygoid, masseter) to the disc by the two-month stage.
Conclusions:
- The complex interplay of multiple muscles, including the masseter and temporalis, contributes to TMJ disc dynamics.
- Early embryonic development establishes the foundational muscular attachments influencing TMJ function throughout life.