Studies on contributing factors in temporomandibular disorders

Area of Science:

• Oral and Maxillofacial Surgery
• Immunology
• Psychosomatic Medicine

Background:

• Temporomandibular disorders (TMD) are complex conditions with multifactorial etiologies.
• Understanding the interplay of mechanical, immunological, and psychological factors is crucial for effective management.

Purpose of the Study:

• To investigate the pathogenesis of TMD by examining microtrauma, immune responses, and psychosocial factors.
• To elucidate the interactions between these contributing factors in TMD development.

Main Methods:

• Analysis of condyle and disc movements in TMD patients using videography and sound recording.
• Evaluation of pathological changes in an animal model following occlusal trauma.
• Detection of immune complexes, anti-collagen II antibodies, and cytokines in synovial fluid.
• Psychosocial assessment using MMPI and LEES.

Main Results:

• Persistent microtrauma, linked to occlusal trauma, was observed in TMD patients.
• Occlusal trauma induced degenerative changes in animal models, mirroring human TMJ osteoarthrosis.
• Evidence of humoral and cellular immune responses within the TMJ, suggesting a role in pathogenesis.
• A significant prevalence of psychosomatic disorders was found in TMD patients.

Conclusions:

• TMD pathogenesis involves a complex interplay of TMJ microtrauma, immune responses, psychosocial factors, and joint anatomy.
• Proposed mechanisms for the interaction of these factors offer insights into TMD development.
• Identified factors provide a basis for developing targeted prevention and treatment strategies for TMD.