OBJECTIVE: The aim of this study was to evaluate morphometrically the amount of newly formed bone after GaAlAs laser irradiation of surgical wounds created in the femur of rats. BACKGROUND DATA: Low-level laser therapy (LLLT) has been used in several medical specialties because of its biomodulatory effects on different biological tissues. However, LLLT is still controversial because of contradictory reports. This is a direct result of the different methodologies used in these works. MATERIALS AND METHODS: In this study, 40 Wistar rats were divided into four groups of 10 animals each: group A (12 sessions, 4.8 J/cm2 per session, observation time of 28 days); group C (three sessions, 4.8 J/cm2 per session, observation time of 7 days). Groups B and D acted as nonirradiated controls. The specimens were routinely processed to wax and cut at 6-microm thickness and stained with H&E. For computerized morphometry, Imagelab software was used. RESULTS: Computerized morphometry showed a significant difference between the areas of mineralized bone in groups C and D (p = 0.017). There was no difference between groups A and B (28 days; p = 0.383). CONCLUSION: It is concluded that, under this experimental condition, LLLT increased bone repair at early bone healing.
OBJECTIVE: The aim of this study was to evaluate morphometrically the amount of newly formed bone after GaAlAs laser irradiation of surgical wounds created in the femur of rats. BACKGROUND DATA: Low-level laser therapy (LLLT) has been used in several medical specialties because of its biomodulatory effects on different biological tissues. However, LLLT is still controversial because of contradictory reports. This is a direct result of the different methodologies used in these works. MATERIALS AND METHODS: In this study, 40 Wistar rats were divided into four groups of 10 animals each: group A (12 sessions, 4.8 J/cm2 per session, observation time of 28 days); group C (three sessions, 4.8 J/cm2 per session, observation time of 7 days). Groups B and D acted as nonirradiated controls. The specimens were routinely processed to wax and cut at 6-microm thickness and stained with H&E. For computerized morphometry, Imagelab software was used. RESULTS: Computerized morphometry showed a significant difference between the areas of mineralized bone in groups C and D (p = 0.017). There was no difference between groups A and B (28 days; p = 0.383). CONCLUSION: It is concluded that, under this experimental condition, LLLT increased bone repair at early bone healing.
Authors: Antonio L B Pinheiro; Luiz G P Soares; Maria Cristina T Cangussú; Nicole R S Santos; Artur Felipe S Barbosa; Landulfo Silveira Júnior Journal: Lasers Med Sci Date: 2011-10-21 Impact factor: 3.161
Authors: Alexandre Greca Diamantino; Renata Amadei Nicolau; Davidson Ribeiro Costa; Alessandra Paes de Barros Almeida; Danila Xênia de Miranda Mato; Marco Antonio de Oliveira; Ana Maria do Espírito Santo Journal: Lasers Med Sci Date: 2017-04-20 Impact factor: 3.161
Authors: Valdir Gouveia Garcia; Juliana Mendonça da Conceição; Leandro Araújo Fernandes; Juliano Milanezi de Almeida; Maria José Hitomi Nagata; Alvaro Francisco Bosco; Leticia Helena Theodoro Journal: Lasers Med Sci Date: 2012-02-28 Impact factor: 3.161