Abrasivity of Yttria Tetragonal Zirconia Polycrystal (Y-TZP) to dental enamel in comparison to noble white high palladium alloy

International Journal of Dental Science and Research Pub Date : 2015-01-01 DOI:10.1016/j.ijdsr.2015.04.002

Kevin Caruana , Adam J. White , Nigel Bubb , Paul A. Brunton

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引用次数: 1

Abstract

Objectives

To test the wear of enamel against Yttria Tetragonal Zirconia Polycrystals (Y-TZP) in comparison to the wear of enamel against a noble white high Palladium alloy.

Methods

A total of 20 specimens were used, 10 of Y-TZP and 10 of High Palladium alloy, both were subjected to 202,800 contacts against an enamel rod 2 × 2 mm in cross section under a mean load of 475.04 g leading to a mean force of 4.66 N in a Wilson Wear Machine. The specimens were kept in Dulbecco's phosphate buffered saline at a pH of 7 and the enamel rods were measured before and after the experiment for loss of enamel height (mm).

Results

The mean wear caused by the Y-TZP and the High Palladium alloy tested was 0.0912 mm, and 0.0113 mm respectively. This difference was statistically significant (p = 0.012 (p < 0.05)).

Significance

It is recommended that Y-TZP is not to be used to form the occlusal surfaces of indirect restorations due to its high abrasive potential with respect to dental enamel.

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钇-四方氧化锆多晶(Y-TZP)对牙釉质的磨耗性与高贵白高钯合金的比较

目的研究氧化钇四方氧化锆多晶(Y-TZP)对牙釉质磨损的影响，并与白高钯合金对牙釉质磨损的影响进行比较。方法使用20个样品，其中10个为Y-TZP, 10个为高钯合金，在Wilson磨损机中，在平均475.04 g载荷下，对2 × 2 mm横截面的搪瓷棒进行202,800次接触，平均力为4.66 N。将标本保存在pH = 7的Dulbecco磷酸盐缓冲盐水中，实验前后分别测量牙釉质棒的牙釉质高度损失(mm)。结果Y-TZP和高钯合金的平均磨损量分别为0.0912 mm和0.0113 mm。差异有统计学意义(p = 0.012;0.05))。建议不要使用Y-TZP来形成间接修复体的咬合表面，因为它对牙釉质有很高的磨蚀潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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International Journal of Dental Science and Research

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