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Volume 11 Issue 4 (October-December) 2022

Original Articles

Evaluation and comparison of flexural strength of abraded and polished porcelain surfaces: An in -vitro study
Dr. Rohit Sharma, Dr. Pratibha Rawat, Dr. Harsha Tiwari

Background: The present study was conducted for evaluating and comparing the flexural strength of abraded and polished porcelain surfaces. Materials & methods: 50 Feldspathic porcelain Vita VMK Master was selected. Fabrication of a plastic mold was done for achieving standardized blocks of ceramic. Dimension of the mold was fixed to be 35 mm x 8 mm x 5 mm. Fabrication of the samples was done with a rectangular plastic mold with perforations in the middle.Each sample was created by combining a suitable quantity of modeling fluid with porcelain powder. Tissue paper was positioned at one end of the mass to absorb extra liquid. Another set of 50 ceramic samples were prepared. Application of Glaze was done for all the samples on one side and then fired according to manufacturer conduction. The samples were tested for their flexural strength using a Universal Testing Machine. All the results were recorded in Microsoft excel sheet followed by statistical analysis using SPSS software. Results: Mean flexural strength among specimens of abraded porcelain group was 129.6 MPa while that of polished porcelain group was 142.8 MPa. While comparing statistically, significant results were obtained. Conclusion: Polishing of the ceramic surfaces could be a better alternative clinical step for improving the longevity.

 
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