Animal model for evaluation of strain gauge in mandibular distraction osteogenesis in rabbits

Abstract

Aim To design and assemble a distraction device with a strain gauge, and establish an animal model for testing it during mandibular distraction osteogenesis. Methods An osteotomy was made in the same position at the junction of mandibular angle and body in 12 rabbits. A customised distraction device attached to a strain gauge was used to distract the mandible. To find out which was the better material, both polyurethane and silicone were used as encapsulation material. After distraction, radiographs were taken, and specimens were examined histologically to record bone formation. Results Distraction osteogenesis was carried out successfully on all rabbits when the device used polyurethanes as the encapsulation material, it did not transfer the strain signals, but those made with silicone did. Conclusion The device with silicone used as the encapsulation material can be used for strain-testing during mandibular distraction osteogenesis in a rabbit model.