Effect of electrical stimulation on mandibular distraction osteogenesis

Area of Science:

• Oral and Maxillofacial Surgery
• Regenerative Medicine
• Biomaterials Science

Background:

• Mandibular lengthening is crucial for treating facial deformities.
• Accelerating bone regeneration during distraction osteogenesis is a significant clinical challenge.

Purpose of the Study:

• To investigate the efficacy of electrical stimulation in enhancing new bone formation during mandibular lengthening.
• To evaluate the impact of direct current electrical stimulation on bone healing in a rabbit model.

Main Methods:

• Twenty adult female rabbits underwent mandibular osteotomy and distraction at 0.7 mm/day for 10 days.
• Ten rabbits received 10 microA direct current electrical stimulation during distraction; ten served as controls.
• Bone formation was assessed using radiography (bone mineral density) and histology (image analysis) at 10, 20, 30, and 60 days post-distraction.

Main Results:

• Histological and image analysis showed significantly greater new bone formation in the electrical stimulation group at 10 and 20 days post-distraction.
• Radiographic evaluation did not reveal significant differences in bone mineral density between groups.
• No significant differences in new bone formation were observed between groups at 30 and 60 days post-distraction.

Conclusions:

• Electrical stimulation during gradual mandibular distraction promotes early-stage new bone formation in a rabbit model.
• The positive effect of electrical stimulation appears to be limited to the initial phase of bone healing.
• Further research is warranted to optimize electrical stimulation parameters for sustained bone regeneration in distraction osteogenesis.