Interfacial shear bond strength between different base metal alloys and five low fusing feldspathic ceramic systems.
This study compared the bond strength between metal alloys and 5 ceramic systems. Ceramic systems (Vita VMK68, Ivoclar IPSd. SIGN, Ceramco II, Matchmaker and Finesse) were fired onto either Ni-Cr or Co-Cr base metal alloy. Metal-ceramic interfaces were subjected to shear loading until failure. The ceramic type significantly affected the bond strength results (p<0.05). For Ni-Cr alloy, the results ranged between 15.4-25.3 MPa and for Co-Cr alloy between 13.3-19.0 MPa. The highest mean bond strength value was obtained with the combination of Ni-Cr alloy-Ceramco II (25.3 MPa), the lowest bond strength was received from the combination of Co-Cr alloy-Ivoclar IPS d.SIGN ceramic (13.3 MPa). Adhesive failures between metal and ceramic were significantly more frequent with Ni-Cr alloy (31 out of 50) than with Co-Cr (20 out of 50) (p<0.05). Ceramco II presented the highest bond strength with both Ni-Cr and Co-Cr being significantly different from one another.
Department of Prosthodontics, Academic Center for Dental Sciences, Gülhane Military Medical Academy, Ankara, Turkey. cumhursipahi@yahoo.com
Cumhur
C
Sipahi
Mutlu
M
Ozcan
D000538:Aluminum Silicates; D002858:Chromium Alloys / Q000737:chemistry*; D003035:Cobalt; D003442:Crowns; D001840:Dental Bonding; D003776:Dental Porcelain / Q000737:chemistry*; D003799:Dental Stress Analysis; D008422:Materials Testing; D016876:Metal Ceramic Alloys; D009532:Nickel; D017680:Potassium Compounds; D033081:Shear Strength
D000538:Aluminum Silicates; D002858:Chromium Alloys; D016876:Metal Ceramic Alloys; D017680:Potassium Compounds; D003776:Dental Porcelain; C016447:feldspar; D003035:Cobalt; D009532:Nickel