Enamel Wear Opposing Polished and Aged Zirconia

被引:41
作者
Burgess, J. O. [1 ]
Janyavula, S. [2 ]
Lawson, N. C. [1 ]
Lucas, T. J. [3 ]
Cakir, D. [2 ]
机构
[1] Univ Alabama Birmingham, Birmingham, AL 35294 USA
[2] Univ Alabama Birmingham, Sch Dent Clin & Community Sci, Birmingham, AL 35294 USA
[3] Univ Alabama Birmingham, Sch Dent, Birmingham, AL 35294 USA
关键词
STABILIZED ZIRCONIA; FEMORAL HEADS; PHASE-TRANSFORMATION; FLEXURAL STRENGTH; CERAMIC MATERIALS; DENTAL CERAMICS; PORCELAINS; ROUGHNESS;
D O I
10.2341/12-345-L
中图分类号
R78 [口腔科学];
学科分类号
1003 ;
摘要
Aging of dental zirconia roughens its surface through low temperature degradation. We hypothesized that age-related roughening of zirconia crowns may cause detrimental wear to the enamel of an opposing tooth. To test our hypothesis, we subjected artificially aged zirconia and reference specimens to simulated mastication in a wear device and measured the wear of an opposing enamel cusp. Additionally, the roughness of the pretest surfaces was measured. The zirconia specimens, artificially aged by autoclave, showed no significant increase in roughness compared to the nonaged specimens. Furthermore, no significant difference in material or opposing enamel wear between the aged and nonaged zirconia was seen. All zirconia specimens showed less material and opposing enamel wear than the enamel to enamel control or veneering porcelain specimens. Scanning electron micrographs showed relatively smooth surfaces of aged and nonaged zirconia following wear testing. The micrographs of the veneering ceramic showed sharp fractured edges and fragments of wear debris. Zirconia may be considered a wear-friendly material for restorations opposing enamel, even after simulated aging.
引用
收藏
页码:189 / 194
页数:6
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