上光前表面处理对半透明氧化锆磨损和抗弯强度的影响。

IF 4.6 1区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Dental Materials Pub Date : 2025-02-15 DOI:10.1016/j.dental.2025.02.006

Manon Wenger , Nicola U. Zitzmann , Nadja Rohr

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引用次数: 0

摘要

目的：确定半透明氧化锆在上光前的表面处理是否会影响磨损和抗弯强度。方法：采用烧结、抛光或喷砂法制备半透明氧化锆圆盘。这三组中有一半的标本是上釉的。制备人牙釉质和牙本质基质作为对照。模拟咀嚼后得到磨损体积、深度和表面粗糙度参数（n = 8 /组）。测定了氧化锆试件的双轴抗折强度，并对断裂进行了分析。统计学采用多因素方差分析（α = 0.05）。结果：釉面氧化锆的整体磨损量（0.020 ± 0.007 mm3）明显高于未釉面氧化锆(0.001 ± 0.001 mm3；P < 3)，牙本质最高（2.327 ± 1.686 mm3）。抛光氧化锆表面的抗弯强度（652 ± 135 MPa）明显高于其他所有组（p ）。意义：当表面抛光时，可以预期半透明氧化锆修复体的最低磨损和最高抗弯强度。在上釉时，先前的表面处理不影响磨损。应用于临床，建议在咬合调整后进行完美的表面抛光，以防止拮抗剂的磨损增加。

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Influence of surface treatment before glazing on wear and flexural strength of translucent zirconia

Objectives

To determine whether the surface treatment of translucent zirconia prior to glazing affects wear and flexural strength.

Methods

Translucent zirconia disks were either left as-sintered, polished, or sandblasted. Half of the specimens within these three groups were glazed. Human enamel and dentin substrates were prepared as control. The wear volume and depth, as well as surface roughness parameters, were obtained after chewing simulation (n = 8 per group). Biaxial flexural strength of zirconia specimens was measured and fractures were analyzed. Statistics was performed with multifactorial ANOVAs (α = 0.05).

Results

The overall wear volume was significantly higher on glazed surfaces (0.020 ± 0.007 mm³) compared to non-glazed zirconia (0.001 ± 0.001 mm³; p < 0.001). No significant difference in wear volume was found among different surface treatments (p = 0.368). Nevertheless, wear volume significantly increased when rough antagonists were used for zirconia and tooth substrates (both p < 0.001). The lowest wear volume was measured on polished zirconia (< 0.001 ± < 0.001 mm³) and highest on dentin (2.327 ± 1.686 mm³). The flexural strength was significantly higher for polished zirconia surfaces (652 ± 135 MPa) than for all other groups (p < 0.001).

Significance

Lowest wear and highest flexural strength of a translucent zirconia restoration can be expected when the surface is polished. When applying glaze, the prior surface treatment does not affect wear. Applied to clinical situations, perfect surface polishing after occlusion adjustments is recommended to prevent increased wear of the antagonist.

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来源期刊

Dental Materials 工程技术-材料科学：生物材料

CiteScore

9.80

自引率

10.00%

发文量

290

审稿时长

67 days

期刊介绍： Dental Materials publishes original research, review articles, and short communications. Academy of Dental Materials members click here to register for free access to Dental Materials online. The principal aim of Dental Materials is to promote rapid communication of scientific information between academia, industry, and the dental practitioner. Original Manuscripts on clinical and laboratory research of basic and applied character which focus on the properties or performance of dental materials or the reaction of host tissues to materials are given priority publication. Other acceptable topics include application technology in clinical dentistry and dental laboratory technology. Comprehensive reviews and editorial commentaries on pertinent subjects will be considered.