不同粘接剂材料对全瓷修复应力分布影响的数值研究

目的 研究不同粘接剂材料对全瓷修复应力分布的影响。方法 采用螺旋CT扫描和CAD建模技术相结合的方法，建立下颌第1磨牙全瓷修复系统模型，选取临床上常见的4种树脂粘接剂材料（Duo Cement、Lute-It、Rely-X ARC、VariolinkⅡ），用ABAQUS软件计算应力分布。结果 使用低填料型Lute-It粘接剂时粘接界面的应力最大。从黏弹性力学角度看，具有较大储能模量和损耗模量的树脂粘接剂会产生较低的应力极值。结论 建议临床上采用高填料型且具有较大储能模量和损耗模量系数的树脂粘接剂。
Objective To investigate the effect of different adhesive materials on all-ceramic restoration. Methods The all-ceramic restoration system model of mandibular first molar was established by spiral computed tomography (CT) scanning and computer-aided design (CAD) modeling. Four types of resin adhesive materials (Duo Cement,Lute-It,Rely-X ARC,Variolink II) used in clinics were selected, and the stress distribution was calculated using the ABAQUS software. Results The stress at the bonding interface was the highest when low filler adhesive Lute-It was used. Based on the viscoelasticity analysis, resin adhesives with a larger storage modulus and loss modulus could yield lower stress extremes. Conclusions The study suggests that high-filler type resin adhesives with a large energy storage modulus and loss modulus should be used clinically.