Influence of different convergence angles of abutment teeth and cement spaces on internal adaptation of anterior CAD-CAM fixed dental prostheses

IF 1.9 4区 医学 Q2 DENTISTRY, ORAL SURGERY & MEDICINE
Keigo Ito, Taro Iwasaki, Jin Kitani, Junichi Honda, Kei Kubochi, Futoshi Komine
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引用次数: 0

Abstract

Purpose: The aim of this study was to investigate the influence of different convergence angles of abutment teeth and different cement spaces on internal adaptation of anterior fixed dental prostheses (FDPs) fabricated with a computer-aided design-computer-aided manufacturing (CAD-CAM) system.

Methods: Composite resin FDPs for 99 standardized maxillary central incisors were fabricated according to nine parameters: three total convergence angles (4 [DG4], 12 [DG12], and 20 degrees [DG20]) and three cement space settings (10 [CS10], 50 [CS50], and 90 µm [CS90]). Internal space values were measured with a cement space replica technique. The Kruskal-Wallis and Steel-Dwass tests were used to evaluate differences in the total convergence angles and luting agent spaces, respectively (α = 0.05).

Results: For all three cement spaces tested, the median marginal gap values between abutment teeth and FDPs decreased significantly as the total convergence angle increased (P < 0.05). For the CS10 and CS50 groups, the internal space values at the axial area increased significantly as the total convergence angles increased (P < 0.05).

Conclusion: Total convergence angles of the abutment teeth and cement spaces affected the marginal and internal adaptation of anterior FDPs fabricated with a CAD-CAM system.

不同基牙会聚角和粘接剂空间对 CAD-CAM 固定前义齿内部适应性的影响
目的:本研究旨在探讨不同基牙会聚角和不同粘接剂空间对使用计算机辅助设计-计算机辅助制造(CAD-CAM)系统制作的前牙固定义齿(FDP)内部适应性的影响:根据以下九个参数为 99 颗标准化上颌中切牙制作复合树脂 FDP:三个总会聚角(4 [DG4]、12 [DG12]和 20 度 [DG20])和三个粘接剂空间设置(10 [CS10]、50 [CS50] 和 90 µm [CS90])。内部空间值是用水泥空间复制技术测量的。Kruskal-Wallis检验和Steel-Dwass检验分别用于评估总收敛角和洗脱剂空间的差异(α = 0.05):在测试的所有三种粘结剂空间中,随着总会聚角的增加,基牙和 FDP 之间的边缘间隙中值显著减少(P < 0.05)。对于 CS10 和 CS50 组,随着总会聚角的增加,轴向区域的内部间隙值明显增加(P <0.05):结论:基牙的总会聚角和粘结剂空间会影响使用 CAD-CAM 系统制作的前牙 FDP 的边缘和内部适应性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of oral science
Journal of oral science DENTISTRY, ORAL SURGERY & MEDICINE-MATERIALS SCIENCE, BIOMATERIALS
CiteScore
3.80
自引率
0.00%
发文量
58
期刊介绍: Information not localized
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