Effect of condylar reconstruction on mandibular growth by autogenous coronoid process graft in goats

Objective To study the growth of the mandible after condylar reconstruction by autogenous coronoid process graft.Methods Eighteen growing male goats were included in this study and divied into group A(n=10)and B(n=8).Each animal underwent right condyle removal and was treated by coronoid process graft.Three-dimensional computerised tomography was performed at different time intervals.Animals in group A were sacrificed at 48 weeks after operation for the measurement of mandibular growth.Four animals in group B were killed at 24 and 48 weeks after operation for histological examination.Results No difference was found in ramus height,mandibular height,and mandibular length between the two sides at 48 weeks postoperatively.The reconstructed condylar size increased significantly,whereas there was a significant reduction of ramus width on the operated side.A well-organised fibrocartilage was seen at the neocondylar surface over time.Conclusion The reconstructed condyle by autogenous coronoid process has the potential to grow under functional stimuli.Therefore,this technique may serve as an alternative method for condylar reconstruction in growing individuals.