Sheibaninia Ahmad, Sepasi Sepehr, Saghiri Mohammad Ali, Sepasi Setareh
Department of Orthodontics, Islamic Azad University, Dental School, Tehran Branch, No. 4, 10th Neyestan Alley, Pasdaran Avenue, P.O. Box 19585-175, Tehran, Iran.
Department of Dental Materials, Islamic Azad University, Dental School, Tehran Branch, No. 4, 10th Neyestan Alley, Pasdaran Avenue, P.O. Box 19585-175, Tehran, Iran.
Int J Dent. 2014;2014:689536. doi: 10.1155/2014/689536. Epub 2014 Sep 23.
Aim. This study aims to evaluate the effect of acidic food simulant and (acetic acid 3%) on the shear bond strength (SBS) and adhesive remnant index (ARI) scores of one conventional and three different self-ligating brackets with different base designs. Materials and Methods. Freshly extracted first maxillary premolars (n = 160) were embedded in resin blocks. A conventional stainless steel bracket, Equilibrium 2, and three types of self-ligating brackets, Speed, In-Ovation R, and Damon 3MX, were bonded to teeth and exposed to distilled water (groups 1, 3, 5, and 7) or acetic acid 3% (groups 2, 4, 6, 8) for 12 weeks. SBS and ARI were calculated and statistical analysis was performed with the analysis of variance (SBS) or χ (2) test (ARI) to compare values between the different groups. Results. Equilibrium 2 and In-Ovation R showed a significantly lower SBS in the acidic environment than in distilled water. Significant differences in ARI scores were found for Equilibrium 2 after immersion in an acidic environment, shifting from 0 in distilled water to 2 in an acidic environment. Conclusions. Equilibrium 2 and In-Ovation R brackets showed a significant decrease in SBS after a 12-week immersion in acetic acid 3%, although all groups showed clinically acceptable SBS. Equilibrium 2 showed significant differences in ARI scores when exposed to acetic acid 3%.
目的。本研究旨在评估酸性食品模拟物（3%乙酸）对一种传统托槽和三种不同底座设计的自结扎托槽的剪切粘结强度（SBS）和粘结剂残留指数（ARI）评分的影响。材料与方法。将新鲜拔除的上颌第一前磨牙（n = 160）嵌入树脂块中。将一个传统不锈钢托槽、Equilibrium 2以及三种自结扎托槽（Speed、In-Ovation R和Damon 3MX）粘结到牙齿上，并使其暴露于蒸馏水（第1、3、5和7组）或3%乙酸（第2、4、6和8组）中12周。计算SBS和ARI，并采用方差分析（SBS）或χ²检验（ARI）进行统计分析，以比较不同组之间的值。结果。Equilibrium 2和In-Ovation R在酸性环境中的SBS显著低于在蒸馏水中的SBS。Equilibrium 2在酸性环境中浸泡后，ARI评分存在显著差异，从蒸馏水中的0变为酸性环境中的2。结论。Equilibrium 2和In-Ovation R托槽在3%乙酸中浸泡12周后，SBS显著降低，尽管所有组的SBS在临床上都可接受。Equilibrium 2在暴露于3%乙酸时，ARI评分存在显著差异。
