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Evaluation of shear bond strength between zirconia core and ceramic veneers fabricated by pressing and layering techniques: In vitro study

单板 立方氧化锆 材料科学 万能试验机 陶瓷 牙科陶瓷 复合材料 分层 粘结强度 芯(光纤) 抗剪强度(土壤) 牙瓷 胶粘剂 图层(电子) 极限抗拉强度 土壤科学 土壤水分 生物 植物 环境科学
作者
D. Vijitha,M. Subash,Saikat Deb,A. Satish,N Mahendirakumar
出处
期刊:Journal of Pharmacy and Bioallied Sciences [Medknow]
卷期号:7 (Suppl 2): S612-S615 被引量:15
标识
DOI:10.4103/0975-7406.163568
摘要

Statement of Problem: Although ceramic veneered on to zirconia core have been in use for quite some time, information regarding the comparative evaluation of the Shear bond strength of Pressable & Layered ceramic veneered on to zirconia core is limited. Purpose of study: To evaluate the shear bond strength of zirconia core and ceramic veneer fabricated by two different techniques, Layering (Noritake CZR) and Pressing (Noritake, CZR Press). Materials and Method: 20 samples of zirconia blocks were fabricated and the samples were divided into group A & B. Group A - Ceramic Veneered over zirconia core by pressing using Noritake CZR Press. Group B - Ceramic Veneered over zirconia core by layering using Noritake CZR. The veneered specimens were mounted on to the center of a PVC tube using self-cure acrylic resin leaving 3 mm of the veneered surface exposed as cantilever. Using a Universal testing machine the blocks were loaded up to failure. Result: The results were tabulated by using independent samples t -test. The mean shear bond strength for Pressed specimens was 12.458 ± 1.63(S.D) MPa and for layered specimens was 8.458 ± 0.845(S.D) MPa. Conclusion: Pressed specimens performed significantly better than the layered specimen with a P value 0.001. Clinicians and dental laboratory technicians should consider the use of pressed ceramics as an alternative to traditional layering procedures to reduce the chances of chipping or de-lamination of ceramics
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