JOURNAL ARTICLE

A study of the influence of occlusal factors and parafunctional habits on the prevalence of signs and symptoms of TMD

Robert Celić, Vjekoslav Jerolimov, Josip Pandurić
International Journal of Prosthodontics 2002, 15 (1): 43-8
11887598

PURPOSE: The purpose of this study was to investigate the prevalence of the clinical signs and symptoms of temporomandibular disorders (TMD) and the relationship between occlusal factors, parafunctional habits, and TMD in a young adult nonpatient population.

MATERIALS AND METHODS: A questionnaire including data from a history and clinical functional examination was used in the study. All 230 subjects were male recruits, from 19 to 28 years of age (mean 21.3 years).

RESULTS: Thirty-eight percent of the subjects reported at least one symptom, while in 45% of the subjects at least one sign of TMD was recorded. Temporomandibular joint clicking (40%) and pain on palpation (34%) were the most commonly recorded signs. Multivariate logistic regression analysis showed several weak but statistically significant correlations between the occlusal factors, parafunctional habits, and TMD in this nonpatient population. TMD signs were thus weakly correlated with malocclusion traits (angle Classes II/1, II/2, III, and cross bite), interferences in retruded contact position, midline discrepancy > or = 2 mm, < or = 10 contacts during maximal biting pressure, nonworking-side interferences, horizontal overlap > or = 5 mm, and parafunctional habits (teeth clenching and teeth grinding).

CONCLUSION: Some association between occlusal factors and TMD signs was found. However, this association cannot be considered unique or dominant in defining subjects with TMD in the population.

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