Hsiu Wan-Ru, Lee Hsin-Lin, Hsu Yung-Chuang, Chiu Hsien-Chung, Wang Yi-Bing, Chuang Chuan-Chung
Department of Dentistry, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan.
School of Dentistry and Graduate Institute of Dental Science, National Defense Medical Center, Taipei, Taiwan.
J Dent Sci. 2022 Apr;17(2):958-964. doi: 10.1016/j.jds.2022.02.012. Epub 2022 Mar 1.
BACKGROUND/PURPOSE: Few studies have comprehensively assessed the shear bonding strength of the luting cements between abutments and fixed partial dentures after dentin surface treatment with disinfectants. The purpose of the study was to evaluate the effect of three commonly used disinfectants (2.5% sodium hypochlorite, 0.2% chlorhexidine, and 0.2% benzalkonium chloride) on the shear bonding strength of four luting cements.
Teeth were mounted on Teflon cylinders and prepared for dentin exposure. Three different disinfectants were used to treat the dentin surface. Nickel-chromium posts were cemented with resin cement, glass ionomer cement, polycarboxylate cement, or zinc phosphate cement. The shear bonding strength of the cement was examined using an Instron testing machine. Two-way analysis of variance (ANOVA) was used to examine the differences in shear bonding strength between the cements. If a statistically significant difference was found through ANOVA, a post hoc test with Tukey's honest significant difference was conducted.
Disinfectants significantly decreased the shear bonding strength of resin cement, with 2.5% sodium hypochlorite causing the most substantial decrease. The zinc phosphate cement group displayed minimal shear bonding strength regardless of the disinfectant used.
The presence of 2.5% sodium hypochlorite significantly reduced the shear bonding strength of resin cements. During permanent cementation of indirect restorations, the choice of luting cement paired with the proper disinfectant is of utmost importance to maintain the shear bonding strength.
背景/目的：很少有研究全面评估在使用消毒剂对牙本质表面进行处理后，基牙与固定局部义齿之间粘结水门汀的剪切粘结强度。本研究的目的是评估三种常用消毒剂（2.5%次氯酸钠、0.2%氯己定和0.2%苯扎氯铵）对四种粘结水门汀剪切粘结强度的影响。
将牙齿安装在聚四氟乙烯圆柱体上并制备牙本质暴露。使用三种不同的消毒剂处理牙本质表面。用树脂水门汀、玻璃离子水门汀、聚羧酸锌水门汀或磷酸锌水门汀粘结镍铬桩。使用Instron测试机检测水门汀的剪切粘结强度。采用双向方差分析（ANOVA）来检验水门汀之间剪切粘结强度的差异。如果通过方差分析发现有统计学显著差异，则进行Tukey真实显著差异的事后检验。
消毒剂显著降低了树脂水门汀的剪切粘结强度，其中2.5%次氯酸钠导致的降低最为显著。无论使用何种消毒剂，磷酸锌水门汀组的剪切粘结强度最小。
2.5%次氯酸钠的存在显著降低了树脂水门汀的剪切粘结强度。在间接修复体的永久粘结过程中，选择粘结水门汀并搭配适当的消毒剂对于维持剪切粘结强度至关重要。
