Gifani Mahshid, Talafi Noghani Mahsa, Sarraf Shirazi Alireza, Boruziniat Alireza
Department of Pediatric Dentistry, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran.
Dental Research Center, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran.
Front Dent. 2025 May 1;22:17. doi: 10.18502/fid.v22i17.18688. eCollection 2025.
This study evaluated the effects of using a universal adhesive and application of a flowable composite by the snow-plow technique on microleakage of Class II composite restorations in primary molars. In this in vitro study, Class II cavities were prepared with their gingival margin at the cementoenamel junction in the proximal surfaces of 90 freshly extracted primary molars. The teeth were then assigned to 3 groups (n=30) for the application of a universal adhesive (Single Bond Universal) in total-etch and self-etch modes and a conventional etch-and-rinse adhesive (Single Bond 2). Each group was divided into 3 subgroups (n=10) for restoration without a flowable liner (control), application of a precured flowable liner, and using a flowable composite as liner by the snow-plow technique. After 1000 thermal cycles, the gingival margin microleakage was evaluated using the fluid filtration technique. Data were analyzed by two-way ANOVA and Tukey's test (alpha=0.05). Type of adhesive, unlike liner application (P=0.579), had a significant effect on microleakage (P=0.01). Application of universal adhesive (whether in self-etch or total-etch mode) resulted in less microleakage than the conventional etch-and-rinse adhesive. There was no statistically significant difference between the two application modes of the universal adhesive (P>0.05). Application of Single Bond universal adhesive for composite restoration of primary molars may improve the marginal seal and decrease microleakage.
本研究评估了使用通用型粘结剂以及采用推雪技术应用可流动复合树脂对乳磨牙Ⅱ类复合树脂修复体微渗漏的影响。在这项体外研究中，在90颗新鲜拔除的乳磨牙近中面的牙骨质釉质界处制备Ⅱ类洞。然后将牙齿分为3组（每组n = 30），分别应用全酸蚀和自酸蚀模式的通用型粘结剂（Single Bond Universal）以及传统的酸蚀冲洗粘结剂（Single Bond 2）。每组再分为3个亚组（每组n = 10），分别为不使用可流动衬层进行修复（对照组）、应用预固化的可流动衬层以及采用推雪技术使用可流动复合树脂作为衬层。经过1000次热循环后，采用流体过滤技术评估龈缘微渗漏情况。数据采用双向方差分析和Tukey检验进行分析（α = 0.05）。与衬层应用方式不同（P = 0.579），粘结剂类型对微渗漏有显著影响（P = 0.01）。应用通用型粘结剂（无论是自酸蚀还是全酸蚀模式）导致的微渗漏均少于传统的酸蚀冲洗粘结剂。通用型粘结剂的两种应用模式之间无统计学显著差异（P > 0.05）。应用Single Bond通用型粘结剂进行乳磨牙复合树脂修复可能会改善边缘封闭并减少微渗漏。
