Gabric D, Blaskovic M, Gjorgijevska E, Mladenov M, Tasic B, Juric IB, Ban T
J Oral Maxillofac Surg. 2016 Jan,74(1):18-28. doi: 10.1016/j.joms.2015.08.017.
PURPOSE: To analyze the healing of bone tissue treated with Er:YAG laser contact and noncontact modes of and piezosurgery in a rat model using triangular laser profilometry.
MATERIALS AND METHODS: Twenty-four 10-week-old adult male Wistar rats were used in the study. Three osteotomies on the medial part of tibia were performed in each animal, 1 in the right tibia and 2 in the left tibia. The osteotomies were performed with a piezoelectric device set at maximal power and the Er:YAG laser in contact mode (power, 7.5 W, pulse energy, 375 mJ, repetition rate, 20 Hz, MSP mode) and noncontact mode (power, 7.5 W, pulse energy, 750 mJ, repetition rate, 10 Hz, QSP mode) with a novel type of circular, digitally controlled handpiece (x-Runner). After surgery, 6 animals were immediately euthanized (group 1), and the others were euthanized after 1 week (group 2, n = 6), 2 weeks (group 3, n = 6), and 3 weeks (group 4, n = 6). Bone healing after osteotomy was analyzed using a 3-dimensional laser scanning technique (ie, laser triangulation profilometry).
RESULTS: The volume reduction rates are similar for all 3 techniques (0.2 to 0.25 mm(3) per week). Greater volume reduction of 0.25 mm3 per week was observed for the Er:YAG laser in noncontact mode (x-Runner). After 3 weeks, almost complete healing of the prepared osteotomy was observed.
CONCLUSION: Within the limitations of this study, the osteotomies performed by the Er:YAG laser in digitally controlled noncontact mode healed the fastest. Published by Elsevier Inc. All rights reserved.