Influence of laser irradiation on fiber post retention
- نوع فایل : کتاب
- زبان : انگلیسی
- مؤلف : Denis Y. Nagase & Patricia M. de Freitas & Susana Morimoto & Margareth Oda & Glauco F. Vieira
- چاپ و سال / کشور: 2011
Description
The purpose of this in vitro study was to compare the bond strength between fiber post and lasertreated root canals. Forty single-rooted bovine teeth were endodontically treated and randomly divided into four groups of equal size according to the root canal treatment: group 1 conventional treatment (without laser irradiation); group 2 Nd:YAG laser (1.5 W, 10 Hz, 100 mJ); group 3 Er,Cr:YSGG laser (0.75 W, 20 Hz); and group 4 Nd:YAG + Er,Cr:YSGG lasers. The fiber posts were cemented with an adhesive system + resin cement, in accordance with the manufacturer’s instructions. A mini acrylic pipe was fixed on the coronal section of the post using a light-polymerized resin. Specimens were mounted on an acrylic pipe with a self-polymerized resin. Retention forces were determined using a universal testing machine (0.5 mm/min). Data were analyzed using one-way ANOVA and Tukey tests (p <0.05). The post retention force in group 2 was found to be lower than that in the other experimental groups. Fractures were observed at the interface between the dentin and the resin in all groups. High-intensity lasers can be used in conventional endodontic treatment; however, root canal surface irradiation using the Nd:YAG laser was shown to negatively affect the post retention force.
Lasers Med Sci (2011) 26:377–380 DOI 10.1007/s10103-010-0861-2 Received: 20 June 2010 / Accepted: 28 October 2010 / Published online: 3 December 2010
