Low level laser therapy in the regeneration of rats tibias submitted to ionizing radiation

• Grant number: 10/51626-9
• Support Opportunities: Regular Research Grants
• Start date: October 01, 2010
• End date: September 30, 2012
• Field of knowledge: Health Sciences - Medicine - Surgery
• Principal Investigator: Max Domingues Pereira
• Grantee: Max Domingues Pereira
• Host Institution: Escola Paulista de Medicina (EPM). Universidade Federal de São Paulo (UNIFESP). Campus São Paulo. São Paulo , SP, Brazil

Abstract

Low Level laser therapy (LLLT) on the bone unleashes cellular increase, both qualitative and quantitative, and accelerates the regeneration process. Few studies are existing in order to evaluate the action of LLLT over the bone submitted to ionizing radiation (IR). The aim of the present study is to assess the effects of LLLT on the repair bone process in tibias of rats that underwent IR. 72 Wistar EPM rats were distributed at random in four groups: Group I - Sham control (18 tibias); Group II - Laser irradiated (18 tibias); Group III - Irradiated with IR (18 tibias); Group IV - Irradiated with IR radiation and laser (18 tibias). The animals from groups III and IV will be irradiated with IR in a single dose of 30 GY. Exact 28 days after the IR, a surgical monocortical perforation of 2,5mm of diameter will be made in the tibias with proper motor and drills under irrigation. In Groups II and IV, 3 laser applications will be performed (AsGaAL, 100 mW, 808mm, 2J energy). The first one right after the suture, the second one after 48 hours, and the third one 96 hours after the surgical procedure. From the day of the surgery on, the animals will undergo euthanasia, after 7, 14 and 21 days. The material collected will be adequately processed for a histomorphometrical analysis of the quantity of neoformed bone. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

FRACHER ABRAMOFF, MEIRE MAMAN; PEREIRA, MAX DOMINGUES; DE SEIXAS ALVES, MARIA TERESA; SEGRETO, ROBERTO ARAUJO; GUILHERME, ARNALDO; FERREIRA, LYDIA MASAKO. Low-Level Laser Therapy on Bone Repair of Rat Tibiae Exposed to Ionizing Radiation. Photomedicine and Laser Surgery, v. 32, n. 11, p. 618-626, NOV 1 2014. (10/51626-9)