The Experimental And Clinical Study On The Management Of Scondary Orbitozygomatic Fracture Deformities

The surgical management of secondary orbitozygomatic fracture deformities is one of the most challenge problems for the plastic surgeon. The modern treatment of this kinds of deformities is based on the principles of craniomaxillofacial surgery, includes: (1) wide exposure of all fractured sites; (2)osteotomy and precise anatomic reduction; (3) internal rigid fixation; (4) bone grafting; and (5)periosteal/soft tissue resuspension. In this study, We focused our work on the following three aspects: (1)The study on the availability of natural coral as a bone graft substitute, (2) The designing of a new type osteotomy for reduction of the malunited orbitozygomatic bone fragments, (3) The clinical classification of the secondary orbitozygomatic fracture deformities and the choice of surgical intervention.1. In order to study the process of biodegradation and new bone formation of the subperiosteally implanted natural coral, Coral blocks(Favites 10×l0×3mm) were implanted on the cranium of rabbits in the way of onlay and inlay bone graft respectively. We found that the coral resorbed gradually in both groups. At the Sixth month, the coral block in the onlay bone graft group was resorbed almost completely, neither radiographic nor histologic study had found any new bone formation, the coral was replaced by dense periosteal-like connective tissue. In the inlay bone graft group, the coral was also resorbed and there...