The Experimental Research On Vertical Alveolar Distraction Osteogenesis In Mandible And Developing Of An Elastic Implant-distraction Device

The absorption or atrophy will take place in the alveolar when the teeth loses. Trauma,tumor operation or periodontal disease will cause defect of the alveolar. Reconstruction of artifcal teeth is necessary in orde to recovering mastication and beautiful outlook. Distraction osteogenesis(DO) has been widely used in the correction of craniofacial deformities and it presented to be an alternative method for alveolar ridge augmentation. Compared with conventional techniques, it can not only correct severe alveolar bone defects, but also elongate the soft tissues such as muscle, vessel, nerve and skin simultaneously. A number of distraction devices are commercially available, which mainly include distraction implants, distraction screws. But there still exist defects in all the devices above such as: semi-buried, easily infection of residual wounds, uncomfortable and foreign body in patient's mouth, and so on.Titanium Nickel shape memory alloy (TiNi-SMA) has fine shape-memory function,biomechanical capability and biocompatibility. There are some shortcoming in the TiNi-SMA distractor at present,such as stabilization,and the simple TiNi-SMA distractor don't overcome these shortcoming personaliy. They should been assembled with other subassembly.In this study, we developed a new completed-buried, self-activated distraction device with TiNi-SMA combined with a implant, established an experimental canine model for alveolar ridge augmentation using TiNi-SMA...