Comparative evaluation of natural enamel wear against polished yitrium tetragonal zirconia and polished lithium disilicate - An in vivo study

Girish S Nazirkar, Swati Vijay Patil, Priyanka P Shelke, Preetam Mahagaonkar, Girish S Nazirkar, Swati Vijay Patil, Priyanka P Shelke, Preetam Mahagaonkar

Abstract

Aim: The aim of this study is to compare wear of the natural teeth against polished yttrium tetragonal zirconia and polished lithium disilicate crowns.

Study setting and design: Experimental type of study.

Materials and methods: Polished yttrium tetragonal zirconia and polished lithium disilicate crowns were fabricated and given to 15 patients each (n=15). Crowns were fabricated opposing natural tooth. Patients were recalled after 1year and impression were recorded with opposing arch and baseline and final cast were scanned and superimposed using 3 D scanner.

Statistical analysis used: Data collected by experiments were computerized and analyzed using the Statistical Package for Social Sciences (SPSS) version 16.0. The normality of the data was checked using the Kolmogorov-Smirnov test and Shapiro-Wilk tests. The data were normally distributed. Statistical analysis was done by using tools of descriptive statistics such as Mean, and Standard Deviation for representing quantitative data (enamel wear measured in μm) Parametric tests: Student t-test for intergroup comparison was done.

Results: No statistical difference were found between wear of opposing enamel for polished yttrium tetragonal and polished lithium disiliacte crowns [p=0.446].

Conclusion: Within the limitations of the study, it can be concluded that polished lithium disilicate showed better clinical outcome than polished yttrium tetragonal zirconia, though the evaluated data was statistically non significant.

Keywords: Polished lithium disilicate; polished lithium disilicate; polished yttrium tetragonal zirconai; wear; wear polished yttrium tetragonal zirconai.

Conflict of interest statement

There are no conflicts of interest.

Copyright: © 2020 The Journal of Indian Prosthodontic Society.

Figures

Figure 1
Figure 1
White light scanner (Sagoo, Arti)
Figure 2
Figure 2
Scanned images superimposed
Figure 3
Figure 3
Analysis of scanned images using polywork software
Graph 1
Graph 1
Comparison of Polished Yttrium Tetragonal Zirconia (Group 1) vs Polished Lithium Disilicate (Group 2)

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