Evaluating Loading Deflection of Distraction Osteogenic Rib in a Rabbit Model

Area of Science:

• Biomedical Engineering
• Orthopedic Surgery
• Regenerative Medicine

Background:

• Partially atrophic ribs and defects necessitate ideal rib arcs with sufficient bone length and width for treatment.
• Developing a distraction device with a strain gauge requires a validated animal model for testing rib distraction osteogenesis.

Purpose of the Study:

• To establish a rabbit model for testing a distraction device with a strain gauge during rib distraction osteogenesis.
• To evaluate the efficacy of the device in achieving rib lengthening and assess bone formation.

Main Methods:

• Osteotomies were performed on the fifth rib in 8 rabbits.
• Customized distraction devices with strain gauges were utilized for rib distraction up to 4 cm.
• Loading deflection gauges and histological examination were employed to assess bone formation after distraction and consolidation.

Main Results:

• Successful distraction osteogenesis was achieved in all rabbits using the developed device.
• The device enabled distraction of the rib up to 4 cm.
• No significant difference in loading deflection was observed between osteogenic and contralateral ribs.

Conclusions:

• The developed device is suitable for strain testing in a rabbit model of rib distraction osteogenesis.
• The established rabbit model for costal distraction osteogenesis is successful and validated.
• This model supports further research into rib reconstruction and defect treatment.