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VOLUME 14 , ISSUE 2 ( February, 2023 ) > List of Articles

ORIGINAL RESEARCH

A Comparative Evaluation of the Shear Bond Strength of Veneering Ceramics and Composite Resin to Zirconia Core: An In Vitro Study

Sapna Chengappa Kambiranda, Nitesh Shetty, Adamane S Chaitra, Ashrath Azwin, Riaz Abdulla, A Fahizah

Keywords : Composite, E.max, Shear bond strength, Zirconia, Zirconia reinforced feldspar

Citation Information : Kambiranda SC, Shetty N, Chaitra AS, Azwin A, Abdulla R, Fahizah A. A Comparative Evaluation of the Shear Bond Strength of Veneering Ceramics and Composite Resin to Zirconia Core: An In Vitro Study. World J Dent 2023; 14 (2):149-154.

DOI: 10.5005/jp-journals-10015-2182

License: CC BY-NC 4.0

Published Online: 17-04-2023

Copyright Statement:  Copyright © 2023; The Author(s).


Abstract

Aim: To evaluate the shear bond strength (SBS) values of commercially veneering ceramics and composite resin layered to zirconia (Zr) core and compare the results with that of porcelain fused to metal (PFM) samples. Materials and methods: Schmitz–Schulmeyer test was used to determine the SBS. A total of 30 Zr blocks of dimensions 10 × 5 × 5 mm were divided into three groups (I, II, and III) of 10 samples each. Group I samples were veneered with IPS e.max Ceram, group II with Zr reinforced feldspar (Zr-FS), and group III with composite. Group IV consisted of PFM blocks as the control group. The fabricated samples were then subjected to thermocycling and evaluated for SBS in a universal testing machine. The values were then statistically analyzed using an independent sample t-test. Result: The results of the current study showed that the SBS value of PFM blocks (19.51 MPa) was the highest, and that of Zr composite (7.03 MPa) was the least among all the four groups. IPS e.max and Zr-FS veneering ceramics showed similar strength values (9.32 and 9.46 MPa, respectively). Conclusion: This in vitro study revealed that the PFM group exhibited the highest SBS, while the Zr-composite the least among all the groups tested. Clinical significance: This study will aid in the clinical selection of the core veneer material depending on the esthetic need and functional requirements. Greater translucency and comparable strength exhibited by the Zr core ceramic veneer make it a valuable alternative in the anterior esthetic region due to the reduced bite forces involved.

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