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首页> 外文期刊>The Journal of Prosthetic Dentistry >Effect of tooth surface roughness on marginal seating and retention of complete metal crowns.
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Effect of tooth surface roughness on marginal seating and retention of complete metal crowns.

机译：牙齿表面粗糙度对完整金属冠的边缘固定和保持力的影响。

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STATEMENT OF PROBLEM: Retention and marginal adaptation factors have major influence on the failure of cemented complete veneer crowns. PURPOSE: This study investigated the effect of axial surface roughness on the marginal seating and retention of silver-palladium crowns luted with zinc phosphate, glass ionomer, and resin cements. MATERIAL AND METHODS: Coarse and fine diamond stones were used to create various surface roughnesses of premolars. A milling machine was used to control the height and angle of the axial walls of tooth preparations. Ten cast metal crowns in 6 subgroups were luted with 3 cements (Phosphacap, Fuji Cap I, and Panavia 21). Marginal seating was recorded with a Digimatic indicator. Retention was determined by measuring the tensile force required to remove a metal crown with a Lloyd testing machine. RESULTS: Two-way analysis of variance revealed statistically significant differences (P <.001) in retention for both luting cements and surface roughness. No significant difference was recorded for marginal seating relative to roughness (P =.860) and interaction effects (P =.204). Tukey-HSD tests revealed substantial differences in retention among Phosphacap, Fuji Cap I, and Panavia 21 cements. Significant differences were not confirmed in marginal seating between Fuji Cap I and Phosphacap cements with coarse diamonds, and Phosphacap and Panavia 21 cements with fine diamonds. CONCLUSIONS: The best retention for complete metal crown was demonstrated for tooth preparations ground with coarse diamonds and cemented with Panavia 21 cement. Differences in axial surface roughness had no effect on the marginal seating of the complete metal crowns.
机译：问题陈述：保持力和边缘适应性因素对胶合完整单板牙冠的破坏有重要影响。目的：本研究调查了轴向表面粗糙度对用磷酸锌，玻璃离聚物和树脂胶合剂浸润的银-钯冠的边缘固定和保留的影响。材料和方法：粗磨和细磨的钻石用于制造各种不同的前磨牙表面粗糙度。使用铣床控制牙齿制备物的轴向壁的高度和角度。用3种胶合剂（Phosphacap，Fuji Cap I和Panavia 21）对6个亚组中的10个铸造金属牙冠进行浸胶。用数字指示器记录边缘座位。通过使用劳埃德试验机测量去除金属冠所需的拉力来确定保持力。结果：方差的双向分析显示，对胶结水泥和表面粗糙度的保留均具有统计学意义（P <.001）。相对于粗糙度（P = .860）和相互作用影响（P = .204），边缘坐置没有明显差异。 Tukey-HSD测试显示Phosphacap，Fuji Cap I和Panavia 21水泥之间的固位率存在很大差异。未确认Fuji Cap I和Phosphacap水泥（带有粗金刚石）与Phosphacap和Panavia 21水泥（带有细金刚石）的边缘间隙没有显着差异。结论：对于用粗金刚石磨碎并用Panavia 21胶粘剂固结的牙齿制备来说，完整金属冠的固位力最佳。轴向表面粗糙度的差异对完整金属冠的边缘固定没有影响。

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