A comparative study on the accuracies exhibited by four commonly used interocclusal registration materials

Interocclusal records are an everyday necessity in routine prosthodontic practice. A number of materials have been advocated by several groups of workers over a length of time to be suitable for the purpose. In the present study, the accuracies exhibited by four commonly used interocclusal recording materials were compared when they were subjected to both the clinical and laboratory phases of jaw relation transfers. The four materials were Zinc oxide and eugenol impression paste, wax corrected with Zinc oxide and eugenol impression paste, Impression plaster and medium body hydrophilic Vinyl Polysiloxane impression material. The results revealed that Vinyl Polysiloxane impression material was the most accurate and clinically acceptable for the purpose. All other materials were found to have significant levels of variance from the control. All four materials exhibited statistically significant variances among the records produced by each one of them and at the various occlusal regions considered. Further scopes still exist to increase the domain of the study and include the other materials found to be suitable for making interocclusal registrations.