Abstract
Cobalt–chromium (Co–Cr) alloys are the most widely used materials for removable and fixed dental prosthetic frameworks. The fitting accuracy between these components in dental prosthetic frameworks assembles (DPFAs) is largely influenced by the manufacturing method. This study presents a novel manufacturing method that combined two common techniques for obtaining one single framework: casting of Co–Cr inserts on top of parts previously manufactured by selective laser melting (SLM) of Co–Cr powder (CoM). Horizontal (n = 4) and vertical (n = 3) surfaces were microscopically analyzed (n = 770 count sum). The results revealed a high precision of the process and high fitting accuracy between the hybrid frameworks. The average distance measured between the frameworks in joined position was 41.08 ± 7.56 µm. In conclusion, the manufacturing of Co–Cr alloys DPFA using the CoM method reduced the deformation of hybrid frameworks and improved the joining accuracy between them.
Highlights
Most of these dental works are composed of removable partial dentures (RPD) [2] fitted onto dental crowns (DCs) [3], resulting in compound denture (CD) [4]
The present study aims to propose a way to improve the accuracy under good reproducibility conditions for the connection between the components (DCs frameworks and RPD framework) of dental prosthetic assembles (CD), and to disseminate the step by step technological process related to the new manufacturing methods, in order to complete the data published in the literature
The results indicated a total average of 41.08 μm for the fitting accuracy between the dental prosthetic assemble frameworks, with a minimum measured average of 32.88 μm
Summary
Academic Editors: Antoniac Iulian and Earar Kamel. Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. There are a wide variety of designed dental prosthetic frameworks assembles (DPFAs) for the treatment of partial edentation [1]. Most of these dental works are composed of removable partial dentures (RPD) [2] fitted onto dental crowns (DCs) [3], resulting in compound denture (CD) [4]. The dynamic instability of DPFAs’ components during functioning is a common problem causing patient’s discomfort and requires replacement with an improved prosthetic work [1,2,3,4]
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