SciELO - Scientific Electronic Library Online

vol.22 número2A manual method to obtain platelet rich plasma índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados




Links relacionados


Acta Ortopédica Brasileira

versão impressa ISSN 1413-7852


BARBOSA, Danillo; VILLAVERDE, Antonio Guillermo Jose Balbin; LOSCHIAVOARISAWA, Emilia Ângela  e  SOUZA, Renato Aparecido de. Laser therapy in bone repair in rats: analysis of bone optical density. Acta ortop. bras. [online]. 2014, vol.22, n.2, pp.71-74. ISSN 1413-7852.


To investigate, by digital radiology, the bone regeneration process in rats submitted to femoral osteotomy and treated with low power laser therapy.


Forty-five Wistar rats were subjected to transverse osteotomy of the right femur and divided randomly into three experimental groups (n = 15): animals not treated with laser therapy G (C), animals that received laser therapy with λ: 660nm G (660nm) and animals that received laser therapy with λ: 830nm G (830nm). Animals were sacrificed after 7, 14 and 21 days. The bone calluses were evaluated by digital X-ray at 65 kVp, 7mA and 0.032 s exposures.


The values obtained were submitted to variance analysis (ANOVA) followed by the Tukey-Kramer test. The significance level adopted was 5%. The groups G (C), G (660nm), and G (830nm) at the 7th day showed a significant bone development, with p <0.0116; the groups G (C), G (660nm), and G (830nm) at the 14th day showed values of p <0.0001; at the 21stday,a higher degree of bone repair were observed in group G (830nm), and G (660nm), with p <0.0169.


Based on the radiographic findings, G (830nm) showed more complete bone regeneration, as shown in the gray shades of the images. Level of Evidence II, Individual Study With Experimental Design.

Palavras-chave : Fractures, bone; Osteotomy; Technology, radiologic; Fracture healing; Rats, wistar.

        · texto em Inglês     · Inglês ( pdf )