Thermoplastic sheet as a spacer: a novel dual modified impression technique

Abstract

The posterior palatal seal (PPS) area plays a critical role in the retention of maxillary complete dentures and is often missed by the clinician. Various techniques have been proposed to record the PPS area. However, the success of these techniques depends on the accurate location and transfer of the anatomic boundaries of the posterior palatal seal area to either the primary or definitive cast, which may be identified with a T-burnisher and indelible marking pencil. In 2006, Chang and Wright described a technique for the location of the PPS intraorally and accurate transfer to the maxillary complete denture cast. This article describes a modified technique for the transfer of the Posterior palatal seal area on the maxillary cast by using Thermoplastic sheet and using it as a spacer for custom tray.