TY - JOUR ID - TI - Evaluation of the effect of ER: YAG laser on apical microleakage (in vitro study) AU - Anas F. Mahdee AU - Ali H. Abbas AU - Salah A. Issmaeel PY - 2013 VL - 25 IS - 4 SP - 66 EP - 71 JO - Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد SN - 18171869 23115270 AB - Background: Apicoectomy and retrograde filling is indicated when conventional endodontic treatment is impossibleor failed to achieve apical seal. The aim of this study was to evaluate the effect of ER: YAG laser on apicalmicroleakage.Materials and Methods: Sixty extracted single-rooted teeth were used in this study. The roots were divided into sixgroups. Group 1: apicoectomy by fissure bur, and apical cavities prepared by round bur, then cavities were filledwith MTA. Group 2: the roots preparations and fillings were the same as group 1, then the apical areas were treatedby Er:YAG Laser. Group 3: apicoectomy by fissure bur, and apical cavities prepared by ultrasound retrotip andcavities were filled with MTA. Group 4: the roots preparations and fillings were the same as group 3, then the apicalareas were treated by Er:YAG Laser. Group 5: the roots obturation with gutta percha, then the apices were resectedusing Er:YAG Laser. Group 6: the roots apices were resected with Er:YAG Laser, then the canals were obturates withgutta percha. Apical microleakage was measured by methylene blue dye penetration technique.Results: Significant difference between the groups. Group 1 shows the best apical seal, while group 5 shows theworse apical sealing ability.Conclusion: Apicoectomy by bur is better than apicoectomy by laser, and apical cavity prepared by bur is betterthan prepared by US. The use of ER: YAG laser in apicoectomy is preferred to be done before obturation of the rootcanal with gutta percha

ER -