厚度和热循环对两种树脂基粘固剂抗张强度的影响:一项体外研究。

Francesco Grande, Massimo Carossa, Alessandro Mosca Balma, Nicola Scotti, Federico Mussano, Santo Catapano
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引用次数: 0

摘要

目的:本研究旨在评估放置在两个钛表面之间的五种不同厚度的两种树脂水泥在老化前后的抗拉强度。材料和方法:使用100个由两个表面组成的钛5级模型,模拟覆盖义齿的半精密附件及其在框架中的外壳。使用两种不同的树脂胶结物(SoloCem和OT-Cem)对样品进行胶结。通过改变外壳直径,创建了五组代表五种不同水泥厚度(50至250μm)的水泥。一半样品在粘合后24小时进行拉伸强度测试,另一半样品在5°C至55°C的30000次热循环后进行拉伸强度试验。Shapiro-Wilk和ANOVA以及事后检验将抗拉强度与变量联系起来:水泥类型,热老化与水泥厚度(p结果:T0和T1时,水泥之间存在统计学差异;SoloCem的抗拉强度平均值是OT-Cem的三倍。热循环确定了两种水泥的抗拉强度值的降低;除100μm厚度组外,仅SoloCem有统计学证据在两种水泥的水泥厚度之间,50µm和100μm表示最佳抗拉强度。大多数裂缝具有粘性。结论:SoloCem比OT-Cem具有更高的拉伸强度,但由于老化而受到更大的应力。对于每组,水泥厚度对抗拉强度值的影响呈反比关系。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
INFLUENCE OF THICKNESS AND THERMOCYCLING ON TENSILE STRENGTH OF TWO RESIN-BASED CEMENTS USED FOR OVERDENTURES BAR-TYPE ATTACHMENTS: AN IN VITRO STUDY.

Purpose: To evaluate the tensile strength of five different thicknesses of two resin cements placed between two titanium surfaces, before and after aging.

Materials and methods: One hundred grade-5 titanium models were used, each composed of two surfaces simulating a semiprecision attachment for overdenture and its housing in the framework. Samples were cemented using two different resin cements (SoloCem and OT-Cem). Five groups representing five different cement thicknesses (from 50 to 250 μm) were created by varying the housing diameter. Half of the samples underwent a tensile strength test 24 hours after luting, while the other half underwent a tensile strength after 30,000 thermic cycles from 5°C to 55°C. Shapiro-Wilk and ANOVA with post-hoc tests were performed to relate the tensile strength to the variables: cement type, thermal aging, and cement thickness (P < .05).

Results: Statistical differences were found between the cements both at T0 and T1; the mean values of tensile strength of SoloCem were three times higher than those of OT-Cem. The thermic cycles determined a reduction of the tensile force values for both cements; statistical evidence was found only for the SoloCem, except for the 100 μm thickness group. Significant differences were also found between the cement thicknesses of both cements, with 50 μm and 100 μm expressing the best tensile strength. Most of the fractures were of cohesive nature.

Conclusions: SoloCem showed a higher tensile strength than OT-Cem but was more stressed by aging. For each group, the cement thickness influenced the tensile strength values with an inverse relationship.

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