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全瓷嵌体和高嵌体修复牙齿的抗折性:一项体外研究。

Fracture resistance of teeth restored with all-ceramic inlays and onlays: an in vitro study.

作者信息

Saridag S, Sevimay M, Pekkan G

出版信息

Oper Dent. 2013 Nov-Dec;38(6):626-34. doi: 10.2341/12-211-L. Epub 2013 Feb 7.

Abstract

Fracture resistance of inlays and onlays may be influenced by the quantity of the dental structure removed and the restorative materials used. The purpose of this in vitro study was to evaluate the effects of two different cavity preparation designs and all-ceramic restorative materials on the fracture resistance of the tooth-restoration complex. Fifty mandibular third molar teeth were randomly divided into the following five groups: group 1: intact teeth (control); group 2: inlay preparations, lithium-disilicate glass-ceramic (IPS e.max Press, Ivoclar Vivadent AG, Schaan, Liechtenstein); group 3: inlay preparations, zirconia ceramic (ICE Zirkon, Zirkonzahn SRL, Gais, Italy); group 4: onlay preparations, lithium-disilicate glass-ceramic (IPS e.max Press); and group 5: onlay preparations, zirconia ceramic (ICE Zirkon). The inlay and onlay restorations were adhesively cemented with dual polymerizing resin cement (Variolink II, Ivoclar Vivadent AG). After thermal cycling (5° to 55°C × 5000 cycles), specimens were subjected to a compressive load until fracture at a crosshead speed of 0.5 mm/min. Statistical analyses were performed using one-way analysis of variance and Tukey HSD tests. The fracture strength values were significantly higher in the inlay group (2646.7 ± 360.4) restored with lithium-disilicate glass-ceramic than those of the onlay group (1673.6 ± 677) restored with lithium-disilicate glass-ceramic. The fracture strength values of teeth restored with inlays using zirconia ceramic (2849 ± 328) and onlays with zirconia ceramic (2796.3 ± 337.3) were similar to those of the intact teeth (2905.3 ± 398.8). In the IPS e.max Press groups, as the preparation amount was increased (from inlay to onlay preparation), the fracture resistance was decreased. In the ICE Zirkon ceramic groups, the preparation type did not affect the fracture resistance results.

摘要

嵌体和高嵌体的抗折性可能会受到所去除牙体组织量以及所使用修复材料的影响。本体外研究的目的是评估两种不同的窝洞预备设计和全瓷修复材料对牙-修复复合体抗折性的影响。将50颗下颌第三磨牙随机分为以下五组:第1组:完整牙齿(对照组);第2组:嵌体预备,二硅酸锂玻璃陶瓷(IPS e.max Press,义获嘉伟瓦登特公司,沙恩,列支敦士登);第3组:嵌体预备,氧化锆陶瓷(ICE Zirkon,义获嘉伟瓦登特公司,盖斯,意大利);第4组:高嵌体预备,二硅酸锂玻璃陶瓷(IPS e.max Press);第5组:高嵌体预备,氧化锆陶瓷(ICE Zirkon)。嵌体和高嵌体修复体用双固化树脂水门汀(Variolink II,义获嘉伟瓦登特公司)粘结固位。经过热循环(5°至55°C×5000次循环)后,对标本施加压缩载荷,直至以0.5 mm/min的十字头速度断裂。采用单因素方差分析和Tukey HSD检验进行统计学分析。用二硅酸锂玻璃陶瓷修复的嵌体组(2646.7±360.4)的抗折强度值显著高于用二硅酸锂玻璃陶瓷修复的高嵌体组(1673.6±677)。用氧化锆陶瓷制作嵌体修复的牙齿(2849±328)和用氧化锆陶瓷制作高嵌体修复的牙齿(2796.3±337.3)的抗折强度值与完整牙齿(2905.3±398.8)相似。在IPS e.max Press组中,随着预备量的增加(从嵌体预备到高嵌体预备),抗折性降低。在ICE Zirkon陶瓷组中,预备类型不影响抗折性结果。

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