Arami Sakineh, Shahabi Sima, Tabatabaie Masomeh, Chiniforush Nasim, Morshedi Ehsan, Torabi Sara
Department of Restorative, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
Department of Dental Materials School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
J Conserv Dent. 2014 May;17(3):216-9. doi: 10.4103/0972-0707.131778.
The aim of this study was to make a comparison between microleakage of conventionally restored class V cavities using bur and acid etchant and, the ones prepared and conditioned by Er:YAG laser.
30 recently extracted intact caries and filling free human permanent molars were used for this study. Then, Cold cure acrylic resin was used to seal the apices. The samples were randomly assigned to 5 groups of six each. Class V cavities were prepared one on buccal and one on lingual surface of each sample. Group 1: cavity preparation by diamond bur and turbine + acid etch, Group 2: cavity preparation by Er:YAG laser + acid etch, Group 3: cavity preparation by Er:YAG laser + Laser etching, Group 4: cavity preparation by diamond bur and turbine + laser etching, Group 5: cavity preparation by Er:YAG laser with no conditioning procedure. The cavities restored with restorative composite resin. Samples were then immersed in 2% methylene blue solution for 24 hours. The data were then analyzed using Wilcoxon signed ranks test and Kruskal-Wallis statistical tests.
The Kruskal Wallis test showed a significant difference (P < 0.05) between enamel and cementum margin microleakage, while the higher microleakage was related to the cementum margin of restorations.
There was no significant difference in evaluating microleakeage degree of cavities prepared by Er:YAG laser and diamond bur.
本研究的目的是比较使用牙钻和酸蚀剂对Ⅴ类洞进行传统修复时的微渗漏情况，以及用铒激光制备和处理的Ⅴ类洞的微渗漏情况。
本研究使用30颗近期拔除的、无龋损和充填物的完整人类恒牙。然后，用冷固化丙烯酸树脂封闭根尖。将样本随机分为5组，每组6个。在每个样本的颊面和舌面各制备一个Ⅴ类洞。第1组：用金刚石牙钻和涡轮机制备洞形+酸蚀；第2组：用铒激光制备洞形+酸蚀；第3组：用铒激光制备洞形+激光蚀刻；第4组：用金刚石牙钻和涡轮机制备洞形+激光蚀刻；第5组：用铒激光制备洞形，不进行预处理。用复合树脂修复洞形。然后将样本浸入2%的亚甲蓝溶液中24小时。随后使用Wilcoxon符号秩检验和Kruskal-Wallis统计检验对数据进行分析。
Kruskal Wallis检验显示釉质和牙骨质边缘的微渗漏之间存在显著差异（P<0.05），而较高的微渗漏与修复体的牙骨质边缘有关。
在评估用铒激光和金刚石牙钻制备的洞形的微渗漏程度方面，没有显著差异。
