Cherian Jovin, Jayakumar Rahul, James Jittin, Thomas Vishnu, Sramadathil Sethu, Kattachirakunnel Sasi Athira
Department of Prosthodontics, Al-Azhar Dental College, Thodupuzha, IND.
Department of Prosthodontics, Indira Gandhi Institute of Dental Sciences, Kothamangalam, IND.
Cureus. 2023 Sep 4;15(9):e44689. doi: 10.7759/cureus.44689. eCollection 2023 Sep.
An essential factor in the clinical acceptability of all ceramic restorations is the degree of tooth enamel wear. Wear of human enamel has been shown to produce traumatic occlusion, loss of vertical dimension, supra eruption of opposing teeth, periodontal disintegration, and temporomandibular dysfunction. To assess and compare enamel wear against two different ceramics (IPS Empress and Zirconia) and against three different ceramic surface treatments (autoglazed, overglazed, and polished).
Zirconia and IPS Empress (Ivoclar Vivadent, Liechtenstein) ceramic samples totaled 30, of which 10 each underwent glaze, overglaze, or polishing with Diaglaze polishing paste. Using a horizontal pin on the disc machine, 60 mounted premolar tooth samples were produced and put through wear tests against ceramic discs. Prior to and following wear, the weight of the tooth samples was measured, and the results were then statistically analyzed using the student t-test, unpaired t-test, and analysis of variance (ANOVA). The qualitative data employed proportions, and the quantitative data used mean and standard deviation to express statistical information. The threshold of significance was set at 5% (α = 0.05).
The results for weight loss after 25,000 cycles for ceramic surfaces that had been overglazed were just a little bit greater than those for ceramic surfaces that had been autoglazed and polished. In each of the various subgroups, it was shown that the weight loss values obtained with polished ceramic after 25,000 cycles were significantly lower than those obtained with autoglazed and overglazed ceramic surfaces (P=0.001). When comparing the results produced by the two separate primary groups, IPS Empress and Zirconia, there was no statistically significant difference between the autoglazed, overglazed, and polished groups. While statistically significant difference was seen for each subgroup of IPS and Zirconia (p ≤ 0.01), particularly Zirconia glazed (1.227) with a highly significant p-value of 0.00.
The findings contribute to the understanding of the potential clinical implications of different ceramic materials and surface finishes in restorative dentistry, offering valuable insights for practitioners in their treatment decisions. Further research and clinical observations may be needed to corroborate these findings and guide evidence-based practices in dental restorations.
全瓷修复体临床可接受性的一个关键因素是牙釉质磨损程度。已表明人类牙釉质磨损会导致创伤性咬合、垂直距离丧失、对颌牙过度萌出、牙周组织破坏以及颞下颌关节功能紊乱。旨在评估和比较两种不同陶瓷（IPS 全瓷和氧化锆）以及三种不同陶瓷表面处理方式（自上釉、二次上釉和抛光）对牙釉质磨损的影响。
氧化锆和 IPS 全瓷（义获嘉伟瓦登特，列支敦士登）陶瓷样本共 30 个，其中 10 个分别进行上釉、二次上釉或用 Diaglaze 抛光膏抛光。使用圆盘机上的水平销，制作 60 个安装好的前磨牙样本，并与陶瓷盘进行磨损测试。在磨损前后测量牙齿样本的重量，然后使用学生 t 检验、非配对 t 检验和方差分析（ANOVA）对结果进行统计分析。定性数据采用比例，定量数据用均值和标准差来表示统计信息。显著性阈值设定为 5%（α = 0.05）。
二次上釉的陶瓷表面在 25000 次循环后的重量损失结果略高于自上釉和抛光的陶瓷表面。在各个亚组中，均表明经抛光的陶瓷在 25000 次循环后获得的重量损失值显著低于自上釉和二次上釉的陶瓷表面（P = 0.001）。比较两个独立主要组 IPS 全瓷和氧化锆产生的结果时，自上釉、二次上釉和抛光组之间无统计学显著差异。虽然 IPS 和氧化锆的每个亚组均有统计学显著差异（p ≤ 0.01），特别是氧化锆上釉组（1.227），p 值为 0.00，具有高度显著性。
这些发现有助于理解不同陶瓷材料和表面处理在修复牙科中的潜在临床意义，为从业者的治疗决策提供有价值的见解。可能需要进一步的研究和临床观察来证实这些发现，并指导牙科修复中的循证实践。
