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首页> 外文期刊>The Journal of Prosthetic Dentistry >The wear of polished and glazed zirconia against enamel
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The wear of polished and glazed zirconia against enamel

机译：抛光和釉面氧化锆对搪瓷的磨损

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Statement of problem: The wear of tooth structure opposing anatomically contoured zirconia crowns requires further investigation. Purpose: The purpose of this in vitro study was to measure the roughness and wear of polished, glazed, and polished then reglazed zirconia against human enamel antagonists and compare the measurements to those of veneering porcelain and natural enamel. Material and methods: Zirconia specimens were divided into polished, glazed, and polished then reglazed groups (n=8). A veneering porcelain (Ceramco3) and enamel were used as controls. The surface roughness of all pretest specimens was measured. Wear testing was performed in the newly designed Alabama wear testing device. The mesiobuccal cusps of extracted molars were standardized and used as antagonists. Three-dimensional (3D) scans of the specimens and antagonists were obtained at baseline and after 200 000 and 400 000 cycles with a profilometer. The baseline scans were superimposed on the posttesting scans to determine volumetric wear. Data were analyzed with a 1-way ANOVA and Tukey Honestly Significant Difference (HSD) post hoc tests (α=.05) Results: Surface roughness ranked in order of least rough to roughest was: polished zirconia, glazed zirconia, polished then reglazed zirconia, veneering porcelain, and enamel. For ceramic, there was no measureable loss on polished zirconia, moderate loss on the surface of enamel, and significant loss on glazed and polished then reglazed zirconia. The highest ceramic wear was exhibited by the veneering ceramic. For enamel antagonists, polished zirconia caused the least wear, and enamel caused moderate wear. Glazed and polished then reglazed zirconia showed significant opposing enamel wear, and veneering porcelain demonstrated the most. Conclusions: Within the limitations of the study, polished zirconia is wear-friendly to the opposing tooth. Glazed zirconia causes more material and antagonist wear than polished zirconia. The surface roughness of the zirconia aided in predicting the wear of the opposing dentition.
机译：问题陈述：与解剖学轮廓的氧化锆冠相对的牙齿结构磨损需要进一步研究。目的：这项体外研究的目的是测量抛光，上釉，抛光后再上釉的氧化锆对人体搪瓷拮抗剂的粗糙度和磨损，并将其与饰面瓷和天然搪瓷的测量值进行比较。材料和方法：氧化锆样品分为抛光，上釉和抛光后再上釉的组（n = 8）。饰面瓷（Ceramco3）和珐琅被用作对照。测量了所有预测试样品的表面粗糙度。磨损测试是在新设计的阿拉巴马州磨损测试设备中进行的。将提取的臼齿的近颊尖部标准化并用作拮抗剂。在基线以及20万和40万次循环后，使用轮廓仪对标本和拮抗剂进行三维（3D）扫描。将基线扫描叠加在测试后扫描上以确定体积磨损。数据采用1步方差分析和Tukey诚实显着性差异（HSD）事后检验（α= .05）进行了分析。结果：表面粗糙度从最小到最粗糙依次排列：抛光氧化锆，釉面氧化锆，抛光后再釉面氧化锆，饰面瓷和搪瓷。对于陶瓷，抛光氧化锆没有可测量的损耗，搪瓷表面没有中等损耗，釉面和抛光后再釉的氧化锆没有明显损耗。饰面陶瓷表现出最高的陶瓷磨损。对于搪瓷拮抗剂，抛光的氧化锆造成的磨损最少，而搪瓷造成的磨损中等。上釉和抛光后再上釉的氧化锆显示出明显的相反瓷釉磨损，而饰面瓷则表现得最多。结论：在这项研究的局限性内，抛光氧化锆对相对的牙齿具有耐磨性。上光的氧化锆比上光的氧化锆引起更多的材料和拮抗剂磨损。氧化锆的表面粗糙度有助于预测对牙的磨损。

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