Abstract
Bruxers (N = 72) were evaluated before and after treatment with four psychological questionnaires: The Multidimensional Health Locus of Control (MHLC), the Illness Behavior Questionnaire (IBQ), the Levine-Pilowsky Depression Questionnaire (LPDQ), and the Taylor Manifest Anxiety Scale. Two weeks after testing the bruxers were treated. Those who completed treatment (N = 39) were again tested. Comparison of bruxers to a normative group on the MHLC-I indicated biuxers perceive themselves as more internally controlled (p < .Ol). Completers were found to have significantly higher MHLC-I scores after treatment (t = 2.0935, df = 20, p < .05), indicating they felt less in control of their own health after treatment. Quitters scored significantly higher on the MHLC-P (powerful others scale) than did completers. Compared to the normative nonbruxer group, bruxers have significantly lower IBQ irritability scores, disease conviction scores, affective inhibition scores, and affective disturbance scores (p < .05). Bruxers had higher score,s on the LPDQ general depression subscale (p < .O/). No significant differences were noted in anxiety between bruxers and a normative group. (This research was supported, in part, by NIDR Grants No. DE04358 and DE05344.)
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