[Prevalence of dentoalveolar malocclusions in patients with temporomandibular disorders, referred to dental school of Ahvaz]

ABSTRACT

Temporomandibular disorders [TMD] is one of the most common problems in the head and neck area. Depending of its indexes, the prevalence of TMD among different societies has been reported differently by various researchers. The aim of this study was to determine the incidence of types of malocclusion in patients with temperomandibular disorders referred to dental school of Ahvaz during 2005-2006 This descriptive cross -sectional study was based on interview and observation of 216 twenty to sixty year old patients with the average of 31.6 years of age that suffering from TMD. To determine the relationship between malocclusion and TMD the SPSS software and proportional comparison test was used. The prevalence of TMD was 59.76% in females, 40.3% in males and 50.9% in patients between 20 to 30 years old. The most common sign of TMD was joint sounds [61.1%] and the less common was limitation in lateral jaw movement. 15.7% of the patients had normal occlusion, 58.8% Cl one malocclusion, 9.8% Cl two d1 malocclution, 11.5% Cl two d2 malocclusion, 4.2% Cl three malocclusion, 10.6% Crossbite, 8.3% open bite, 40.8% abnormal overjet, 30.1% abnormal overbite, and 59.8% had crowding. The prevalence of TMD was higher in females than males, and the age of prevalence was 20-30. The most common sign of TMD was joint sounds and the less common was limitation in lateral jaw movement. The prevalence of posterior open bite and decreased overbite in TMD group was significant [p=0.000], but there was no relationship between other types of malocclusion and TMD