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http://dx.doi.org/10.14368/jdras.2014.30.2.112

Comparison of shear bond strength according to porcelain build-up methods  

Lee, Ha-Young (Department of Prosthodontics, School of Dentistry, Kyungpook National University)
Cho, Jin-Hyun (Department of Prosthodontics, School of Dentistry, Kyungpook National University)
Lee, Cheong-Hee (Department of Prosthodontics, School of Dentistry, Kyungpook National University)
Publication Information
Journal of Dental Rehabilitation and Applied Science / v.30, no.2, 2014 , pp. 112-120 More about this Journal
Abstract
Purpose: This study compared the shear bond strength of heat pressed and feldspathic porcelain to metal. Through thermocycling, the clinical aspect of heat pressed porcelain fused metal was estimated. Materials and Methods: 90 non-precious metal specimens were made ($4{\times}4{\times}8 mm$) and divided to three groups. All spicimens were treated and built-up with the porcelain ($4{\times}4{\times}3 mm$) by 2 different methods according to group: Group I: $Inspiration^{(R)}$, Group II: Ivoclar, IPS $Inline^{(R)}PoM$, Group III: GC Initial IQ-One $Body^{(R)}PoM$. The half of each group's specimens were thermocycled. All specimens' shear bond strength were measured by Instron universal testing machine. Exact measuring point was far 1 mm from porcelain/metal interface to the porcelain side. For the statistical analysis, 2-way ANOVA was used. Results: In no-thermocycling specimens, the shear bond strength showed no statistical significance between each group (P > 0.05). In comparison between nothermocycling and thermocycling specimens in each group, the shear bond strength was decreased according to thermocycling, but there was no statistical significance (P > 0.05). In thermocycling specimens, there was no statistical significance between each group (P > 0.05). Conclusion: In feldspathic porcelain and other two types heat pressed porcelain, there was no statistical difference in the shear bond strength of porcelain to metal. The heat pressed porcelain seems to be clinically useful for the aspect of the shear bond strength.
Keywords
shear strength; porcelain;
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