Precision of the milled full-arch framework fabricated using pre-sintered soft alloy: A pilot study
10.4047/jap.2018.10.2.128
- Author:
Hyun Wook WOO
1
;
Sung Am CHO
;
Cheong Hee LEE
;
Kyu Bok LEE
;
Jin Hyun CHO
;
Du Hyeong LEE
Author Information
1. Department of Prosthodontics, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea. deweylee@knu.ac.kr
- Publication Type:Original Article
- Keywords:
Precision;
Full arch framework;
Pre-sintered soft alloy;
Marginal discrepancy;
Triple scan technique
- MeSH:
Alloys;
Pilot Projects;
Prostheses and Implants
- From:The Journal of Advanced Prosthodontics
2018;10(2):128-131
- CountryRepublic of Korea
- Language:English
-
Abstract:
PURPOSE: This study aimed to evaluate the marginal discrepancy of full-arch frameworks in implant-supported prostheses fabricated using pre-sintered soft alloy (PSA). MATERIALS AND METHODS: Full-arch metal frameworks 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 absolute marginal discrepancy (AMD) values of the frameworks were measured in cross-sectional images that had been drawn as part of the triple-scan protocol. The AMD values were compared among the tested alloy groups using the Kruskal-Wallis test, with a post hoc Mann-Whitney U test (α=.05). RESULTS: The FHA and PSA groups showed lower marginal discrepancies than the CA group (P < .001). However, the FHA group did not differ significantly from the PSA group. CONCLUSION: Soft alloy milling is comparable to hard alloy milling, and it is more precise than casting in terms of the marginal fit of implant-supported, full-arch prostheses.
