Association between the accuracy of intermaxillary relations and complete denture usage

Abstract

Statement of problem. Previous studies have investigated possible associations between the accuracy of intermaxillary relations and complete denture usage with variable results. Purpose. This study investigated the association between the intermaxillary relations in new complete dentures and the use of these dentures for daily wear and eating. Methods. A prospective study of patients (n = 523) attending Guy’s Dental Hospital for complete dentures was undertaken. Patients were examined at the beginning of treatment and at the first post insertion visit. Rest vertical dimension and vertical dimension of occlusion were measured with a Willis gauge. Quality of registration of centric relation position was assessed and, 3 months later, a postal questionnaire was sent to investigate patients’ use of dentures. Data were analyzed with Pearson’s chi-squared test with exact nonparametric inference. Results. Adequate interocclusal rest space was associated with daily wear of dentures (χ 2 = 7.97, P =.018). Quality of registration of centric relation was associated with daily wear (χ 2 = 32.43, P <.001) and use of dentures for eating (χ 2 = 20.23, P =.003). Conclusion. Positive associations were found between the accuracy of intermaxillary relations and complete denture usage. (J Prosthet Dent 1999;81:520-5.)