回收CAD/CAM二硅酸锂陶瓷:表面处理和老化对树脂水泥结合强度的影响。

Larissa Mendonça de Miranda, Aparecida Tharlla Leite Caldas, Dayanne Monielle Duarte Moura, Karina Barbosa Souza, Isauremi Vieira de Assunção, Mutlu Özcan, Rodrigo Othávio de Assunção E Souza
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引用次数: 0

摘要

目的:研究二硅酸锂(LD)的回收、表面处理和热循环(TC)对树脂水泥结合强度(SBS)的影响。材料和方法:根据回收周期制作LD块,每种策略24块:控制常规烧结;1R(1个循环循环)和3R(3个循环循环循环)。对于回收组,将块打蜡(10x10x3mm),安装在硅胶环中,倒入投资材料,然后通过失蜡技术压制烧结LD块的残留物。剩余的LD如所述重复使用,直到达到3R。然后,将块体嵌入丙烯酸树脂中,打磨并根据因素“表面处理”(HF20s+硅烷和HF120s+硅烷以及Monobond Etch&Prime-MEP)和TC(有/10000次循环和没有)进行分割(n=15)。表面处理后,制作树脂水泥圆柱体(直径:2mm),并进行SBS测试(100KgF,1mm/min)。数据(MPa)通过三元方差分析、Tukey检验(5%)和威布尔分析进行分析。用立体显微镜进行失效分析。结果:方差分析显示,所有因素均具有显著性(P=.000*)。3RMEP组(105.09±19.49)的SBS在实验组中最高。1RHF20sTc(7.50±1.97)组的SBS最低,与CHF20sTc(15.69±3.77)、1RHF20s(15.12±3.03)、1RHF120sTc(14.60±3.43)和3RHF20sTc15.65±0.97)相似。威布尔模量和特征强度在实验组之间变化(P=0.00)。失效分析显示有粘合型和混合型。结论:当用HF120s+S或MEP处理DL陶瓷时,DL陶瓷的再循环增加了SBS对树脂水泥的转化率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Recycling CAD/CAM Lithium Disilicate Ceramic: Effect of Surface Treatment and Aging on the Bond Strength to Resin Cement.

Purpose: To investigate the effects of recycling lithium disilicate (LD), surface treatment, and thermocycling on the bond strength to resin cement.

Materials and methods: A total of 72 tablets (10 × 10 × 3 mm) of LD were made according to the recycling cycle with 24 tablets for each strategy: control (conventional sintering), 1R (1 recycling cycle), and 3R (3 recycling cycles). For the recycling groups, tablets were waxed, mounted in a silicone ring, and poured with investment material, and residues of sintered LD tablets were pressed by the lost wax technique. The residual LD was reused as described until it reached 3R. Afterward, the tablets were embedded in acrylic resin, sanded, and divided (n = 15) according to the factors of 'surface treatment' (hydrofluoric acid [HF] for 20 seconds [HF20s] and silane, HF for 120 seconds [HF120s] and silane, and Monobond Etch & Prime [MEP]) and thermocycling (TC; with 10,000 cycles and without). After surface treatment, cylinders (diameter: 2 mm) of resin cement were made and submitted to SBS test (100 kgf, 1 mm/minute). Data (MPa) were analyzed by three-way ANOVA, Tukey test (5%), and Weibull analysis. Failure analysis was performed with a stereomicroscope.

Results: ANOVA revealed that all factors were significant (P = .000*). The group 3RMEP (105.09 ± 19.49) presented the highest SBS among the experimental groups. The 1RHF20sTc (7.50 ± 1.97) group had the lowest SBS, similar to CHF20sTc (15.69 ± 3.77), 1RHF20s (15.12 ± 3.03), 1RHF120sTc (14.60 ± 3.43), and 3RHF20sTc (15.65 ± 0.97). The Weibull modulus and characteristic strength varied among the experimental groups (P = .0). Failure analysis revealed adhesive and mixed types.

Conclusions: The recycling of DL ceramics increases the SBS to resin cement when the ceramic is treated with HF120s and silane or MEP.

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