Bone regeneration therapy using low level laser treatment in a rabbit model: pilot study

Area of Science:

• Biomedical Engineering
• Regenerative Medicine
• Surgical Innovation

Background:

• Bone regeneration is crucial for treating craniofacial defects.
• Laser therapies are emerging as potential tools to enhance bone healing.
• Diode lasers offer a non-invasive option for stimulating biological processes.

Purpose of the Study:

• To investigate the efficacy of diode laser irradiation on bone wound healing in a rabbit calvarial model.
• To evaluate the impact of varying laser treatment durations on bone regeneration.
• To assess the safety and histological response to diode laser application.

Main Methods:

• Creation of standardized calvarial defects in 14 rabbits.
• Division into control and three diode laser-treated groups (15s, 30s, 45s).
• Assessment using microcomputed tomography (micro-CT) and histological analysis at 2 and 4 weeks post-surgery.

Main Results:

• No significant differences in bone structural outcomes at 2 weeks.
• Higher histomorphometry values observed in laser-treated groups at 4 weeks (p=0.030).
• Improved bone fraction and histomorphometry, with reduced connectivity density over time in laser-treated groups.
• Histology showed enhanced bone formation and more mature bone architecture compared to controls.
• No adverse effects were noted in any laser-treated group.

Conclusions:

• Diode laser treatment demonstrates potential for enhancing bone formation and maturation in calvarial defects.
• The applied laser protocols appear safe and well-tolerated.
• Further research may explore optimized laser parameters for clinical applications in bone regeneration.