Abstract
Purpose: To compare the debonding/crack initiation strength (D/CIS) of a low-fusing pressable leucite-based glass ceramic (PC) fused to metal to a feldspathic porcelain (FP) fused to metal. Materials & Methods: As per ISO 9693:1999, 40 rectangular metal specimens (25.0 mm × 0.5 mm × 3.0 mm) were prepared. Twenty of the specimens were cast in a base metal nickel-chromium alloy (BA), and 20 were cast in a noble metal palladium-silver alloy (NA). Ten randomly selected NA and BA alloy specimens had FP applied. The remaining 10 NA and BA alloy specimens had ash-free wax patterns applied, the metal-wax complexes invested, and were pressed with a PC. The dimensions of the ceramic specimens were 8.0 mm × 1.0 mm × 3.0 mm, creating a combined metal-ceramic complex thickness of 1.5 mm. All specimens were subject to a three-point bending test at a crosshead speed of 1.5 mm/min. Fracture loads were recorded in Newtons and D/CISs calculated by the formula τ b = k × F fail. Results: Mean D/CISs, measured in MPa (standard deviations): NA-FP 32.56 (4.62), NA-PC 30.23 (5.06), BA-FP 30.98 (4.41), and BA-PC 31.81 (3.48). A two-way ANOVA (p > 0.05) did not demonstrate significant difference between groups. Conclusion: The debonding/crack initiation strength of a low-fusing pressable leucite-based glass ceramic fused to metal was equivalent to that of a feldspathic porcelain fused to metal.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 239-247 |
| Number of pages | 9 |
| Journal | Journal of Prosthodontics |
| Volume | 14 |
| Issue number | 4 |
| DOIs | |
| State | Published - Dec 2005 |
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Keywords
- Metal-ceramic bond strength
- Pressable ceramic
- Schwick crack-initiation test
- Three-point bending test
ASJC Scopus subject areas
- Dentistry(all)
Cite this
Comparison of bond strength of a pressed ceramic fused to metal versus feldspathic porcelain fused to metal. / Schweitzer, Daniel M.; Goldstein, Gary; Ricci, John; Silva, N. R F A; Hittelman, Eugene L.
In: Journal of Prosthodontics, Vol. 14, No. 4, 12.2005, p. 239-247.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Comparison of bond strength of a pressed ceramic fused to metal versus feldspathic porcelain fused to metal
AU - Schweitzer, Daniel M.
AU - Goldstein, Gary
AU - Ricci, John
AU - Silva, N. R F A
AU - Hittelman, Eugene L.
PY - 2005/12
Y1 - 2005/12
N2 - Purpose: To compare the debonding/crack initiation strength (D/CIS) of a low-fusing pressable leucite-based glass ceramic (PC) fused to metal to a feldspathic porcelain (FP) fused to metal. Materials & Methods: As per ISO 9693:1999, 40 rectangular metal specimens (25.0 mm × 0.5 mm × 3.0 mm) were prepared. Twenty of the specimens were cast in a base metal nickel-chromium alloy (BA), and 20 were cast in a noble metal palladium-silver alloy (NA). Ten randomly selected NA and BA alloy specimens had FP applied. The remaining 10 NA and BA alloy specimens had ash-free wax patterns applied, the metal-wax complexes invested, and were pressed with a PC. The dimensions of the ceramic specimens were 8.0 mm × 1.0 mm × 3.0 mm, creating a combined metal-ceramic complex thickness of 1.5 mm. All specimens were subject to a three-point bending test at a crosshead speed of 1.5 mm/min. Fracture loads were recorded in Newtons and D/CISs calculated by the formula τ b = k × F fail. Results: Mean D/CISs, measured in MPa (standard deviations): NA-FP 32.56 (4.62), NA-PC 30.23 (5.06), BA-FP 30.98 (4.41), and BA-PC 31.81 (3.48). A two-way ANOVA (p > 0.05) did not demonstrate significant difference between groups. Conclusion: The debonding/crack initiation strength of a low-fusing pressable leucite-based glass ceramic fused to metal was equivalent to that of a feldspathic porcelain fused to metal.
AB - Purpose: To compare the debonding/crack initiation strength (D/CIS) of a low-fusing pressable leucite-based glass ceramic (PC) fused to metal to a feldspathic porcelain (FP) fused to metal. Materials & Methods: As per ISO 9693:1999, 40 rectangular metal specimens (25.0 mm × 0.5 mm × 3.0 mm) were prepared. Twenty of the specimens were cast in a base metal nickel-chromium alloy (BA), and 20 were cast in a noble metal palladium-silver alloy (NA). Ten randomly selected NA and BA alloy specimens had FP applied. The remaining 10 NA and BA alloy specimens had ash-free wax patterns applied, the metal-wax complexes invested, and were pressed with a PC. The dimensions of the ceramic specimens were 8.0 mm × 1.0 mm × 3.0 mm, creating a combined metal-ceramic complex thickness of 1.5 mm. All specimens were subject to a three-point bending test at a crosshead speed of 1.5 mm/min. Fracture loads were recorded in Newtons and D/CISs calculated by the formula τ b = k × F fail. Results: Mean D/CISs, measured in MPa (standard deviations): NA-FP 32.56 (4.62), NA-PC 30.23 (5.06), BA-FP 30.98 (4.41), and BA-PC 31.81 (3.48). A two-way ANOVA (p > 0.05) did not demonstrate significant difference between groups. Conclusion: The debonding/crack initiation strength of a low-fusing pressable leucite-based glass ceramic fused to metal was equivalent to that of a feldspathic porcelain fused to metal.
KW - Metal-ceramic bond strength
KW - Pressable ceramic
KW - Schwick crack-initiation test
KW - Three-point bending test
UR - http://www.scopus.com/inward/record.url?scp=31344479876&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=31344479876&partnerID=8YFLogxK
U2 - 10.1111/j.1532-849X.2005.00052.x
DO - 10.1111/j.1532-849X.2005.00052.x
M3 - Article
C2 - 16359480
AN - SCOPUS:31344479876
VL - 14
SP - 239
EP - 247
JO - Journal of Prosthodontics
JF - Journal of Prosthodontics
SN - 1059-941X
IS - 4
ER -