Understanding the relationship between occlusal discrepancies and their role in temporomandibular disorder: A questionnaire-based research

Abstract

Background: Temporomandibular disorder (TMD) presents as a multifaceted condition that impacts the temporomandibular joint (TMJ), the masticatory muscles, and other related structures. The role of occlusal factors in TMD etiology has been a subject of debate, necessitating further investigation. Aim: This questionnaire-based research aimed to explore the relationship between occlusal discrepancies and their role in TMD. Materials and Methods: The study involved 126 volunteers, comprising 69 females and 57 males, aged between 15 and 40 years, who had no previous history of systemic, musculoskeletal, or neurological disorders. To assess the degree of TMD, the researchers utilized the Fonseca questionnaire, and extra-oral and intra-oral examinations were done to check for occlusal discrepancy which was then classified according to the criteria of Angle’s classification in all three planes along with functional TMJ examination. Results: 55.5% of the population had some of the symptoms of TMJ disorders. Clinical examination showed that 45.2% of the population had tenderness on palpation. Variation of mouth opening was 37.72 ± 0.401 (±1.06%), the right lateral excursive movements were 6.88 ± 0.177 (±2.57%), and left lateral excursive movements were 6.6 ± 0.228 (±3.46%) respectively. The presence of “clicking” or “popping” was noted in 55 (43.6%) participants. Conclusion: The findings suggest that occlusal factors may significantly affect TMD development and symptomatology. Cases with occlusal discrepancies in multiple planes exhibited a significantly high prevalence of signs and symptoms related to TMD.