Histological evaluation of the effect of low-level laser on distraction osteogenesis in rabbit mandibles.
Kreisner PE, Blaya D, Gaiao L, Maciel-Santos ME, Etges A, Santana-Filho M, de Oliveira MG
Av. Cel. Lucas de Oliveira, 1841/203, Petropolis CEP: 90460-001 – Porto Alegre, RS, Brazil, email@example.com.
Objectives: This study evaluated the action of low level laser therapy (LLLT) on the percentage of newly formed bone in rabbit mandibles that underwent distraction osteogenesis (DO). Study design: Ten rabbits underwent bone lengthening according to the following protocol: Latency – 3 days; Activation – 7 days 0.7 mm/d; and Consolidation – 10 days. The control group was composed of 4 rabbits. The experimental group, composed of 6 rabbits, received infrared GaAlAs LLLT (wavelength=830 nm, 40 mW) according to the following protocol: point dose of 10 J/cm(2) applied directly on the bone site that underwent DO during bone consolidation at 48-hour intervals. Results: The percentage of newly formed bone was greater in the LLLT group (57.89%) than in the control group (46.75%) (p=0.006). Conclusion: The results suggest that LLLT had a positive effect on the percentage of newly formed bone. Better-quality bone sites may allow early removal of the osteogenic distractors, thus shortening total treatment time.
Med Oral Patol Oral Cir Bucal 2009 Dec 29