曲線牽張成骨修復(fù)犬下頜骨缺損的實(shí)驗(yàn)研究
[Abstract]:Mandible defect is a common clinical condition in oral and maxillofacial surgery. It is well known that mandible has an important role in the function of oral function, and its defect directly affects the quality of life of the patient. In addition, mandible is an important part of maintaining facial appearance. The appearance damage caused by mandibular defect is directly related to the patient's quality of life. At present, although the ideal reconstruction effect can be achieved clinically for mandibular defects, the reconstruction can be carried out by adopting a self-bone transplantation or a substitute, so that the surgical wound is large in different degrees, the defect of the normal tissue of the sacrifice area and the possibility of rejection reaction or insufficient strength can be avoided, and in particular, the defect of the mandibular angle region and the lower jaw region is affected, the specific arc shape requirements make the repair material be difficult to shape and achieve the ideal shape and function reconstruction effect, It is one of the hot topics in the field of maxillofacial reconstruction and reconstruction. Distraction Osteogenesis (DO) technique provides a reliable method for repairing bone defect. In recent years, as the technology is widely applied to the reconstruction of cranio-maxillofacial deformity and maxillofacial bone defect, the treatment effect is difficult to compare with the conventional method, thus becoming one of the key points in the research of jaw defect repair. In clinical practice, however, the distraction osteogenesis is linear, the force of which is in threaded way, can not satisfy the need of distraction osteogenesis in the mandibular defect accompanied with mandibular angle and mandibular angle region, how to change the limitation of the screw force application way, It is urgent to study and solve the problem that the curve and even the three-dimensional stretch are achieved. On the basis of optimizing design spherical extrusion force built-in curve distractor and verifying its stretch effectiveness, this study combined with the previous research of this group to discuss the effect of different animal model curve distraction osteogenesis, which is intended to provide necessary experimental basis for further study of curve distraction. The experimental study consisted of two parts: the first part: the curve stretch animal model was established and the dog was used as an experimental animal after the preparation and screening of the distractor, a 3cm mandibular rectangular defect was prepared on one side of the mandible body part according to the curve distraction, and a distraction transfer disc was designed. An animal model suitable for curve distraction osteogenesis was established. on the basis of establishing an animal model, acquiring skull data of an experimental animal by CT, constructing a three-dimensional model and manufacturing a solid model, accurately measuring the mandibular defect data of the model, designing and manufacturing an individualized spherical extrusion force-transmitting built-in curve distractor, By means of in vitro experiments, the stretch effectiveness and stretch track were verified, which provided reference basis for animal experiment. The second part: The experimental study of the mandibular defect of canine with curved distraction osteogenesis was carried out on the basis of the previous study of this group, and the bone defect curve of the mandible was induced by the established animal model. aims at further verifying the curve distraction osteogenesis of a spherical extrusion force built-in distractor under different conditions, It provides the necessary experimental basis for further study of curve distraction and clinical application. The results of this study show that the animal model can be used in the experimental study of curve distraction by creating a curve distraction osteogenesis in canine mandibular rectangular defect. The results show that the distraction force of the spherical extrusion force is stable and the controllability is good. In vitro stretch and trajectory experiments both proved to have reliable stability and stretch effectiveness. The design provides the necessary conditions for the study of curve distraction. 3. The design of stretch distractor after volume optimization is consistent with the requirement of distraction osteogenesis, and the structure is reasonable. The distraction osteogenesis is consistent with the design trajectory, and the curve distraction is similar to that of the linear distraction osteogenesis, which can reach the ideal bone requirement.
【學(xué)位授予單位】:第四軍醫(yī)大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2015
【分類號(hào)】:R782.2
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