On the prediction of dentist-evaluated patient compliance in orthodontics.

The aim of the present study was to determine to what degree social and psychological patient variables can predict orthodontic co-operation evaluated by dentists 3 and 6 months after the beginning of treatment. The subjects were 94 patients from seven orthodontic practices. They received a questionnaire with four subscales: impulsiveness, dominance, anxiety, and orthodontic attitudes. Compliance was assessed by an 11-item instrument based on the studies of Slakter et al. (1980). None of the social indices could predict co-operation, but the psychological scales for orthodontic attitudes, impulsiveness and dominance showed a significant relationship to later co-operation. The combination of all psychological variables (regression equation) could explain co-operation 3 months later to 12.1 per cent and to 16.8 per cent 6 months later. The implications for psychological guidance in orthodontics and future research are discussed.