J Adv Prosthodont.  2019 Oct;11(5):280-285. 10.4047/jap.2019.11.5.280.

Comparative clinical study of the marginal discrepancy of fixed dental prosthesis fabricated by the milling-sintering method using a presintered alloy

Affiliations
  • 1Department of Prosthodontics, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea. deweylee@knu.ac.kr
  • 2Department of Periodontics and Endodontics, State University of New York at Buffalo, Buffalo, NY, USA.
  • 3Institute for Translational Research in Dentistry, Kyungpook National University, Daegu, Republic of Korea.
  • 4Department of Dental Biomaterials, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea.
  • 5Department of Dental Science, Graduate School, Kyungpook National University, Daegu, Republic of Korea.

Abstract

PURPOSE
The present study was designed to examine the clinical fit of fixed dental prosthesis fabricated by the milling-sintering method using a presintered cobalt-chromium alloy.
MATERIALS AND METHODS
Two single metal-ceramic crowns were fabricated via milling-sintering method and casting method in each of the twelve consecutive patients who required an implant-supported fixed prosthesis. In the milling-sintering method, the prosthetic coping was designed in computer software, and the design was converted to a non-precious alloy coping using milling and post-sintering process. In the casting method, the conventional manual fabrication process was applied. The absolute marginal discrepancy of the prostheses was evaluated intraorally using the triple-scan technique. Statistical analysis was conducted using Mann-Whitney U test (α=.05).
RESULTS
Eight patients (66.7%) showed a lower marginal discrepancy of the prostheses made using the milling-sintering method than that of the prosthesis made by the casting method. Statistically, the misfit of the prosthesis fabricated using the milling-sintering method was not significantly different from that fabricated using the casting method (P=.782). There was no tendency between the amount of marginal discrepancy and the measurement point.
CONCLUSION
The overall marginal fit of prosthesis fabricated by milling-sintering using a presintered alloy was comparable to that of the prosthesis fabricated by the conventional casting method in clinical use.

Keyword

Presintered; Alloy; Marginal discrepancy; Clinical; Fixed dental prosthesis; Dental

MeSH Terms

Alloys*
Clinical Study*
Crowns
Dental Prosthesis*
Humans
Methods*
Prostheses and Implants
Alloys
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