Repair of bone defects treated with autogenous bone graft and low-power laser

Because bone healing at the graft site is similar to a fracture repair, the purpose of the present study was to evaluate the effects of low-power laser irradiation on the repair of rat skull defects treated with autogenous bone graft. A defect measuring 3 mm in diameter was produced in the left pari...

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Veröffentlicht in:The Journal of craniofacial surgery 2006-03, Vol.17 (2), p.297-301
Hauptverfasser: da Silva, Rosane Vierra, Camilli, José Angelo
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Camilli, José Angelo
description Because bone healing at the graft site is similar to a fracture repair, the purpose of the present study was to evaluate the effects of low-power laser irradiation on the repair of rat skull defects treated with autogenous bone graft. A defect measuring 3 mm in diameter was produced in the left parietal bone and filled with an autogenous bone graft obtained from the right parietal bone. The animals were divided into 3 groups of 20 rats each: nonirradiated control, irradiated with 5.1 J/cm, and irradiated with 10.2 J/cm. The laser (2.4 mW, 735 nm, 3.4 x 10 W/cm, 3-mm spot size) was applied three times per week for 4 weeks. Greater volume of newly formed bone was observed in the irradiated group with 10.2 J/cm. In both irradiated groups, a greater volume of newly formed bone occurred only in the first 2 weeks. The results demonstrated that laser irradiation at the grafted site stimulated osteogenesis during the initial stages of the healing process in a skull defect of the rat and that this effect was dose dependent.
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subjects Analysis of Variance
Animals
Bone Density
Bone Regeneration - radiation effects
Bone Transplantation - methods
Dose-Response Relationship, Radiation
Low-Level Light Therapy
Male
Parietal Bone - surgery
Rats
Rats, Wistar
title Repair of bone defects treated with autogenous bone graft and low-power laser
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