Cast versus 3D-printed cobalt-chromium framework for removable partial denture: a case report

Abstract

Background: The diverse steps in the Cobalt-Chromium (Co-Cr) casting process can induce misfit, highlighting the need for new methods to improve the fitting of metallic framework for Removable Partial Dentures (RPD). Objective: This case report describes and compares the clinical performance of two fabrication techniques mandibular metallic framework for RPDs. Case report: After preparing the abutment teeth and the impression to obtain the working model, two fabrication techniques were applied the metallic framework: lost wax technique and 3D printing. For the 3D printing technique, the working model was digitized, and the framework was planned using Exocad (GmbH) software and fabricated with a 3D printer (EOS M280). With the denture base conventionally processed for both metallic frameworks, they were digitized, and the distance between the metallic framework and the mandibular arch was measured using reverse engineering software (GOM Inspect). The RPDs were installed in an interleaved manner to collect data on OHRQoL using the OHIP-14 questionnaire and patient satisfaction (installation and after 3 months). Conclusions: The 3D printing process produced a metallic framework comparable to the cast Co-Cr alloy framework in terms of fit, quality of life related to oral health, patient satisfaction, and the absence of surface porosity.

KEYWORDS

3D-printed; Direct metal laser sintering; Framework; Patient satisfaction; Removable partial denture.