Clinical study to evaluate the wear of natural enamel antagonist to zirconia and metal ceramic crowns
Clinical study to evaluate the wear of natural enamel antagonist to zirconia and metal ceramic crowns
复制标题
DOI：
10.1016/j.prosdent.2015.03.001
复制
发表时间：
2015-09-01
影响因子：
4.6
通讯作者：
Shah, Naseem
中科院分区：
文献类型：
--
作者：
Mundhe, Kailas;Jain, Veena;Shah, Naseem
问题陈述。牙齿磨损是一个复杂的过程，如果不加以预防，可能会对口颌系统的完整性产生不利影响。不同的牙科修复材料可能会影响天然釉质拮抗剂的磨损量。本体内研究的目的是评价和比较一年后釉质对天然釉质、氧化锆和金属烤瓷冠的磨损。材料和方法。选择10名年龄在18岁至35岁之间的参与者，他们需要2个完整的牙冠，上颌或下颌磨牙区域的两侧各1个，并且在对侧牙弓中具有健康的天然牙齿。对于每个参与者，1个整体抛光氧化锆冠和1个釉面金属陶瓷冠，并粘固。为了评估拮抗性天然釉质（前磨牙和磨牙）的磨损，立即（基线）和在粘固后1年制作聚乙烯基硅氧烷印模。天然牙釉质对天然牙釉质的磨损作为对照进行评价。扫描得到的模型（使用3D白色光扫描仪），并使用3D软件计算最大线性磨损量。采用单因素重复测量方差分析进行数据分析。金属烤瓷冠粘固后1年，拮抗釉质的平均咬合磨损为69.20 ± 4.10 μ m（前磨牙）和179.70 ± 8.09 μ m（磨牙），而氧化锆冠，前臼齿为42.10 +/- 4.30 μ m，臼齿为127.00 +/- 5.03 μ m。天然釉质相对天然釉质的咬合磨损在前磨牙区为17.30 +/- 1.88 μ m，在磨牙区为35.10 +/- 2.60 μ m。Bonferroni事后检验显示，金属烤瓷冠粘结1年后，拮抗釉质的咬合磨损显著高于对照组（P
Statement of problem. Tooth wear is a complex process, which, if not prevented, may adversely affect the integrity of the stomatognathic system. Different restorative dental materials may affect the amount of wear on natural enamel antagonists.Purpose. The purpose of this in vivo study was to evaluate and compare the wear of enamel opposing natural enamel, zirconia, and metal ceramic crowns after 1 year.Material and methods. Ten participants between 18 and 35 years of age requiring 2 complete crowns, 1 on either side of maxillary or mandibular molar region, and having healthy natural teeth in the opposing arch were selected. For each participant, 1 monolithic polished zirconia crown and 1 glazed metal ceramic crown were fabricated and cemented. To evaluate the wear of the antagonistic natural enamel (premolar and molar), polyvinyl siloxane impressions were made immediately (baseline) and at 1 year after cementation. The wear of natural enamel against natural enamel was evaluated as the control. The resulting casts were scanned (using a 3D white light scanner), and 3D software was used to calculate the maximum amount of linear wear.Results. One-way repeated measures ANOVA was conducted to analyze data. Mean +/- SD occlusal wear of the antagonistic enamel 1 year after the cementation of metal ceramic crowns was 69.20 +/- 4.10 mu m for premolar teeth and 179.70 +/- 8.09 mu m for molar teeth, whereas for zirconia crowns, it was 42.10 +/- 4.30 mu m for premolar teeth and 127.00 +/- 5.03 mu m for molar teeth. Occlusal wear of natural enamel opposing natural enamel was 17.30 +/- 1.88 mu m in the premolar region and 35.10 +/- 2.60 mu m in the molar region. The Bonferroni post hoc test revealed that the occlusal wear of antagonistic enamel 1 year after the cementation of a metal ceramic crown was significantly higher (P