Department of General Dentistry, Advanced Education in General Dentistry Residency, Air Force Postgraduate Dental School, Joint Base San Antonio, Lackland, Texas, United States of America; Uniformed Services University of the Health Sciences, Bethesda, Maryland, United States of America.
Department of General Dentistry, Advanced Education in General Dentistry Residency, Air Force Postgraduate Dental School, Joint Base San Antonio, Lackland, Texas, United States of America; Uniformed Services University of the Health Sciences, Bethesda, Maryland, United States of America, Phone: +1 (210) 2920760, e-mail:
J Contemp Dent Pract. 2023 Oct 1;24(10):725-728. doi: 10.5005/jp-journals-10024-3568.
The purpose of this study was to evaluate the bond strength and fracture mode of universal resin cement to dentin compared to self-adhesive and adhesive resin cement with and without an adhesive bonding agent.
Seventy-two molar teeth were sectioned to expose coronal dentin, divided into three groups, and assigned to RelyX Universal (universal), RelyX Ultimate (adhesive), or RelyX Unicem 2 (self-adhesive) cements from 3M. The 3 groups were further subdivided into 2 subgroups of 12 specimens each, with or without the use of an adhesive bonding agent. Lithium-disilicate discs were bonded to the dentin surface using the cements, stored for 24 hours in distilled water, and subjected to 2,000 thermocycles before shear bond strength testing and fracture mode analysis.
Significant differences in bond strength and fracture mode were found between groups based on cement or the use of a bonding agent. Both the universal and adhesive cements had significantly greater bond strengths to dentin with the use of a bonding agent versus no bonding agent. With the self-adhesive cement, there was no significant increase in bond strength to dentin with the use of a bonding agent.
The novel universal resin cement had similar bond strengths to dentin as the adhesive cement with the use of a bonding agent, and similar bond strengths as the self-adhesive cement without the use of a bonding agent. The adhesively bonded universal cement had the greatest percentage of mixed and cohesive fractures.
When greater adhesion is needed clinically, the novel universal resin cement may be used with an adhesive bonding agent. However, when less adhesion is needed, it could be used without a bonding agent in self-adhesive mode.
本研究旨在评估通用树脂水门汀与自粘接和自酸蚀树脂水门汀相比，对牙本质的粘结强度和断裂模式，其中包括有无粘接剂。
72 颗磨牙被切割以暴露冠部牙本质，分为三组，并分别分配给 3M 的 RelyX Universal（通用型）、RelyX Ultimate（自粘接型）或 RelyX Unicem 2（自酸蚀型）水泥。这三组进一步分为 2 个亚组，每组 12 个样本，使用或不使用粘接剂。使用水泥将锂硅二酸盐片粘结到牙本质表面，在蒸馏水中储存 24 小时，然后在进行剪切粘结强度测试和断裂模式分析之前进行 2000 次热循环。
根据水泥或粘接剂的使用，各组之间的粘结强度和断裂模式存在显著差异。与不使用粘接剂相比，通用和自粘接型水泥在使用粘接剂时对牙本质的粘结强度显著增加。在自粘接型水泥中，使用粘接剂时对牙本质的粘结强度没有显著增加。
新型通用树脂水门汀在使用粘接剂时与自粘接型水泥具有相似的牙本质粘结强度，在不使用粘接剂时与自酸蚀型水泥具有相似的粘结强度。粘接的通用树脂水泥具有最大比例的混合和内聚性断裂。
当临床上需要更大的粘结力时，可以使用新型通用树脂水门汀和粘接剂。然而，当需要较少的粘结力时，它可以在自粘接模式下使用，而无需粘接剂。
