LOGIN
 
Share Page:
Back

Volume 22 , Issue 1
January/February 2009

Pages 94100


Ceramic Pressed to Metal Versus Feldspathic Porcelain Fused to Metal: A Comparative Study of Bond Strength

Bhavani Venkatachalam, DMD, MS/Gary R. Goldstein, DDS/Mitchell S. Pines, DDS/Eugene L. Hittelman, MA, EdD


PMID: 19260436

Purpose: The aim of this study was to compare the debond/crack initiation strength (D/CIS) of a leucite-based low-fusing ceramic pressed (PC) to metal and feldspathic porcelain (FP) fused to metal. Materials and Methods: Forty rectangular metal specimens, 20 noble alloy (NA; gold-palladium) and 20 base metal alloy (BA; cobalt-chromium) were fabricated per ISO 9693:1999 standards (25.0 mm 3 0.5 mm 3 3.0 mm). Ten samples in each group received FP and the remaining 10 received PC. The samples in the PC group underwent wax pattern build-ups and subsequent investing and casting. The ceramic dimensions in all four groups were 8.0 mm 3 1.0 mm 3 3.0 mm. The final metal-ceramic specimen thickness was 1.5 mm. All specimens were subject to the Schwickerath crack-initiation three-point bending test at a crosshead speed of 1.5 mm/min. Metal-ceramic fracture loads were recorded in Newtons and D/CIS was calculated using the formula: tb = k × Ffail. Results: Mean D/CIS were as follows: BA-FP: 36.11 2.31 MPa, NA-FP: 42.64 1.94 MPa, BA-PC: 37.47 6.02 MPa, and NA-PC: 47.94 3.92 MPa. A 2-way ANOVA revealed no significant difference in D/CIS values between the four groups. A statistically significant difference was noted when comparing the mean D/CIS values obtained between the two metal alloys used (NA: 45.29 MPa and BA: 36.79 MPa). Conclusion: No differences (P > .05) in mean D/CIS were found between the low-fusing ceramic pressed to metal and the FP fused to metal. A higher mean D/CIS (P > .05) was found for the NA compared to the BA, with both ceramics tested. Int J Prosthodont 2009;22:94100.


Full Text PDF File | Order Article

 

 
Get Adobe Reader
Adobe Acrobat Reader is required to view PDF files. This is a free program available from the Adobe web site.
Follow the download directions on the Adobe web site to get your copy of Adobe Acrobat Reader.

 

© 2017 Quintessence Publishing Co, Inc

IJP Home
Current Issue
Ahead of Print
Archive
Author Guidelines
About
Accepted Manuscripts
Submission Form
Submit
Reprints
Permission
Advertising
Quintessence Home
Terms of Use
Privacy Policy
About Us
Contact Us
Help