Introduction: Over the years, occlusion disharmony were accepted as one of the major causes of functional disorders of the temporomandibular joint (TMJ).

Objective: The goal of this research is to examine the effects of Occlusal Disharmony on TMJ.

Methodology: This observational study was conducted at Department of Prosthodontics, Faculty of Dentistry, Bangabandhu Sheikh Mujib Medical University, Shahbagh, Dhaka, Bangladesh from January 2006 to December 2007 among 150 patients. Data were collected on the basis of the clinical and radiological record and associated changes on some specific parameters (mentioned in methodology). Collected data in terms of different parameters were shown in tabular form and statistical analysis was done to observe the statistical significance.

Results: Among the group I patients 20.0% had Class I (Normal) molar relation, Highest 40.0% had class II molar relation and 20.0% had no molar relation and class III molar relationship. Among the group I patients, highest 40.0% had 1-2 and >5 mm over bite, 20.0% had edge to edge relation of anterior teeth and none had 3-5 mm (normal) relation. Among the group II patients 22.4% had edge to edge relation, none was in found 1-2 mm, 59.7% had 3-5 mm and 17.9% had >5 mm. Among the group III patients 14.3% had edge to edge relation, 1-2mm and 3-5 mm and 57.1% had >5 mm.

Conclusion: We can conclude from our result that that in the TMJ temporomandibular dysfunction (TMD), occlusal disharmonies were significant

Keywords: Temporomandibular joint dysfunction, Occlusal disharmonies, Masticatory system.

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Dr Muhammad Waly Ahad

Associate Professor (Current Charge), Department of Dentistry, M Abdur Rahim Medical College, Dinajpur