エポキシ・レジンと歯科用石膏を用いたトランスファー・コーピング法の臨床術式

Abstract

Production of impressions and working models in the production of prostheses for multiple teeth requires high level skills and includes many indefinite elements. In the removable and replaceable die type working model method using dowel pins, which is widely performed, impression of multiple teeth should be taken at a time. In the individual die method, impression taking of the dental arch model is generally very difficult compared with impression taking of the die. Therefore, we produce working models by the transfer coping method in daily practice for simultaneous prosthesis of multiple teeth. Epoxy resin (DIE·EPOXY®: American Dental Supply, Inc.) is used as the die of the working model and a plaster (Zorock®: Shimomura Plaster Co., Ltd.) as the dental arch model. The die is made removable, and prostheses are produced. The transfer coping method using composite materials does not require high level impression taking skills, and the working procedure at the clinic is simple. When prostheses for multiple teeth are produced, the burden on the patient such as the amount of dental anesthetics can be reduced. In addition, the die produced with epoxy resin with high accuracy and marginal strength can be used multiple times and can be readily detached from dental plaster in the production of a dental arch model. We describe here the procedure of the production of prostheses by the transfer method using composite materials in clinical cases.