Comparative evaluation of linear dimensional change and resistance to the compressibility of three polyvinyl siloxane interocclusal recording materials: an in-vitrostudy

Abstract

Background: Simulation of the patient’s occlusion on an articulator marks the basis for initiating any prosthodontic treatment. An understanding of the inherent properties of materials used to record the maxillomandibular relationship becomes essential to minimise errors. The soft recording material initially fills the spaces between teeth, hardens, and records the specific relationship of the arches. Elastomers as interocclusal record materials have consistently yielded the least error among the materials studied.Aim: To comparatively evaluate linear dimensional change and resistance to compression of three polyvinyl siloxane interocclusal recording materials after setting.Materials and methods: Clonebite (Ultradent), Colorbite D (Zhermack) and Imprint bite (3M ESPE) were evaluated for linear dimensional changes using Travelling Microscope and resistance to compressibility using Universal Testing Machine.Results: Maximum linear dimensional change was observed in Imprint bite along with the highest resistance to compressibility. The minimum linear dimensional change was seen in Colorbite D while the least resistance to compressibility was seen in Clonebite.Conclusion: From the results of the present study, the immediate articulation of casts is recommended after the bite registration using the material tested. However, a delay up to 8 hours could be considered as acceptable for Clonebite and Colorbite D.