Fracture strength of porcelain fused to metal crowns made of cast, milled or laser-sintered cobalt-chromium

DSpace Repository

Fracture strength of porcelain fused to metal crowns made of cast, milled or laser-sintered cobalt-chromium

Show full item record

Files for download

Find Full text There are no files associated with this item.

Facebook

Simple item record

Publication Article, peer reviewed scientific
Title Fracture strength of porcelain fused to metal crowns made of cast, milled or laser-sintered cobalt-chromium
Author(s) Suleiman, Sozan Hama ; Vult von Steyern, Per
Date 2013
English abstract
AIMS: The aim was to compare the fracture strength of porcelain fused to metal crowns with copings fabricated in Co-Cr using different manufacturing techniques (casting, milling and laser-sintering) with crowns manufactured in a high-gold alloy. METHODS: A total of 50 identical crowns were fabricated and sub-divided into five groups; cast Co-Cr, milled Co-Cr, two groups of laser-sintered Co-Cr and a control group cast in a high-gold alloy. After thermocycling (5000 cycles, 5-55°C) and pre-load (30-300 N, 10,000 cycles) the crowns were loaded until fracture. Load (N) and fracture mode were recorded. RESULTS: There was a significant difference (p < 0.05) in fracture strength between the control group and one of the laser-sintered groups. The mean values (N) for the groups were as follows: cast Co-Cr, 1560 ± 274; milled Co-Cr, 1643 ± 153; laser-sintered Co-Cr 1, 1448 ± 168; laser-sintered Co-Cr 2, 1562 ± 72; control group, 1725 ± 220. CONCLUSION: There is no difference in strength between Co-Cr crowns produced using the different production technologies: casting, milling or laser-sintering. Metal ceramic crowns made with copings fabricated in a high-gold alloy present numerically higher fracture strength than crowns made with copings fabricated in Co-Cr alloys. The difference is confirmed when analyzing the fracture surfaces, but the difference in fracture strength value is limited and is only significant with regard to one of the two laser-sintered groups.
DOI http://dx.doi.org/10.3109/00016357.2012.757650 (link to publisher's fulltext)
Publisher Informa
Host/Issue Acta Odontologica Scandinavica;71
Volume 5
ISSN 0001-6357
Pages 1280-1289
Language eng (iso)
Subject(s) CAD/CAM dental
Co-Cr alloys
dental laser sintering
fracture strength
metal ceramic alloys
Medicine
Research Subject Categories::ODONTOLOGY
Handle http://hdl.handle.net/2043/16286 (link to this page)

This item appears in the following Collection(s)

Show full item record

Search


Browse

My Account

Statistics