Removable partial prosthesis model evaluation in dental laboratory

Objectives: The purpose was to verify the quality for the making of removable partial prosthesis by the Dental Laboratory Technician (DLT).

Methods: 140 models were analysed in 05 dental prosthesis laboratories in the city of Teresina-PI-Brazil, A form was applied, with 14 closed questions, and the collected data were submitted to statistical analysis using the SPSS program. The models were analysed through natural or artificial light and photographed for purpose of record and illustration.

Results: The results showed that in 100% of the cases the molding material used was alginate. 93.43% of the models were poured by the Dental Surgeon (DS). Of those, 64.47% were poured in hard plaster and 36.43% in dental stone. According to criteria such as surface quality, detail reproduction, bubbles and nodules presence, proper reproduction of the edentulous area, 78.57% of the models were considered inadequate. The models were, mostly (96.43%), mounted in an articulator by the DLT, but only 1 DS sent the record to the mounting of the models. The hinge type articulator was used in 97.14% of the mountings. In 94.29% of the cases, the planning and design was not executed by the DS and in 87.86% of the cases no evidence of mouth preparation was found. The communication between the DS and the DLT was, mostly, done by phone, in 80% of the cases.

Conclusions: It was verified that the removable partial prosthesis continues to be neglected in relation to its clinical and laboratorial making, through an excessive transfer of responsibilities from the DS to the DTL and an inefficient communication between both.