Precision of the milled full-arch framework fabricated using pre-sintered soft alloy: A pilot study

Abstract

This study aimed to evaluate the marginal discrepancy of full-arch frameworks in implant-supportedprostheses fabricated using pre-sintered soft alloy (PSA). MATERIALS AND METHODS. Full-arch metalframeworks were fabricated on the edentulous implant model using casting alloy (CA), fully-sintered hard alloy(FHA), and PSA (n = 4 in each group). To evaluate the misfit of the framework to the abutments, the absolutemarginal discrepancy (AMD) values of the frameworks were measured in cross-sectional images that had beendrawn as part of the triple-scan protocol. The AMD values were compared among the tested alloy groups usingthe Kruskal-Wallis test, with a post hoc Mann-Whitney U test (α=.05). RESULTS. The FHA and PSA groupsshowed lower marginal discrepancies than the CA group (P