title: [Evaluation of bond strength between low fusing porcelain with goldplated cobalt-chromium alloys].
abstract: OBJECTIVE
  To evaluate the bond strength of Vita OMEGA 900 low fusing porcelain fused with the goldplated Wirobond cobalt-chrome metalt ceramic alloy.
  
  
  METHODS
  Low fusing porcelain was fused with the cobalt-chromium alloy strips(group A) and the goldplated cobalt-chromium alloy strips(group B) respectively according to ISO9693 (A:8,B:10). 8 specimens of each group were submitted to three point bending test. Two more test pieces fused with gold plated cobalt-chromium alloys were made (group B'). One test piece of both group B and group B' were observed under scanning electron microscope (SEM) randomly. The data was analyzed with SPSS 16.0 software package.
  
  
  RESULTS
  The bond strength (MPa) of group A and group B was 29.92±4.28 and 28.20±5.21, respectively (P>0.05), both higher than 25 MPa required by ISO9693. SEM showed that Vita OMEGA 900 low fusing porcelain and the goldplated Wirobond cobalt-chrome metalt ceramic alloy combined together closely without cracks. Much gold was fused to the cobalt-chrome alloy surface of breaking porcelain specimen after testing.
  
  
  CONCLUSIONS
  Vita OMEGA 900 low fusing porcelain can match with the goldplated Wirobond cobalt-chrome metalt ceramic alloy. Supported by Foundation of Education Department of Jiangxi Province (GJJ10367).
authors.affiliation: Department of Comprehensive Dentistry, Affiliated stomatological Hospital, Nanchang University. Nanchang 330006, Jiangxi Province, China.E-mail:gj190407@163.com.
authors.forename: Jing
authors.initials: J
authors.lastname: Guo
authors.forename: Jia
authors.initials: J
authors.lastname: Zhu
authors.forename: Hong-shui
authors.initials: HS
authors.lastname: Zhu
mesh_terms: D002858:Chromium Alloys; D003722:Dental Alloys; D001840:Dental Bonding; D003776:Dental Porcelain; D008422:Materials Testing; D016876:Metal Ceramic Alloys
chemical_list: D002858:Chromium Alloys; D003722:Dental Alloys; D016876:Metal Ceramic Alloys; C110711:vita omega; D003776:Dental Porcelain; C047040:Vita VMK 68