Development of New Silicone Rubber Impression Materials for Maxillary Defects

Abstract

In cases with maxillary defects, there are complicated undercut areas that may also contain sensitive tissue. For such cases, we developed a novel impression method using an addition-curing silicone rubber impression material mixed with Vaseline for secure and precise impression. The new impression material had the same degree of permanent strain and dimensional stability as traditional addition-curing silicone rubber impression material. However, it had problems including a difficult procedure and rough surface of the plaster model. Therefore, we developed a second new impression material that has the same degree of surface roughness as traditional addition-curing silicone rubber impression material and an easy procedure for maxillary defects.