The purpose of this study was to investigate the role of functional malocclusion in temporomandibular disorders (TMD) in untreated orthodontic patients. A total of 508 orthodontic patients were enrolled. All patients were evaluated for the presence of various types of functional malocclusion and clinical signs of TMD before treatment. The chi-square test was used to evaluate the association of functional malocclusion and TMD. The frequencies of TMD were 44.2% in patients with retruded position (RP) interference and 38.1% in those without such interference (p > 0.05). The frequency of TMD in patients with protrusive interference was greater than those without (32.2% vs. 18.4%; p < 0.005). Patients with balancing interference had a significantly higher frequency of TMD than those without (49.2% vs. 23.9%; p < 0.0001). We thus conclude that patients with functional malocclusion of balancing or protrusive interference type have an increased risk for developing TMD.
|Number of pages||4|
|Journal||The Functional orthodontist|
|Publication status||Published - 1998 Jan 1|
All Science Journal Classification (ASJC) codes