Mountable fibula reconstruction and jawbone defect model, and manufacturing method and application thereof

Abstract

The invention discloses a mountable fibula reconstruction and jawbone defect model, and a manufacturing method and application thereof. The model comprises jawbone defect model bodies and fibula modelbodies. The manufacturing method comprises the following steps: constructing a complete jawbone simulation model and a fibula simulation model by using computed tomography (CT) scanning and a medicalsoftware; then designing a fibula section which is most suitable for reconstructing a pathological jaw through a reconstruction and cutting simulation method; adjusting a rotation angle; printing jawbone defect model bodies and fibula model bodies through a 3D printing technology; and finally, performing assembling through connecting bulges and connecting grooves on the jawbone defect model bodies and the fibula model bodies. The application comprises manufacturing a fibula osteotomy reconstruction composite guide plate required for fibula cutting by using the model provided by the invention.According to the invention, a fibula can be more accurately cut, so that a reconstructed jawbone can better recover facial appearance of a patient and can accurately adapt to jaw alveolar ridges, anddenture repair can be better performed after the operation. The osteotomy reconstruction composite guide plate can overcome the defect of secondary perforation on a fibula and can improve operation precision.

Description

technical field [0001] The invention relates to the field of oral and maxillofacial-head and neck surgery, in particular to a mandibular defect model that can be assembled with fibula and its manufacturing method and application. Background technique [0002] In recent years, cases of jaw defects and deformities caused by factors such as growth and development problems, traffic accidents, and facial tumors have been on the rise. In view of this disease, the steps of this kind of surgery are currently carried out by stomatologists in most hospitals in China. , through the CT taken by the patient, observe the lesion area and reconstruct the three-dimensional model through professional medical software and formulate the corresponding surgical plan, and then cut out the normal bones in the human body to reconstruct the jaw. Sufficient volume and appropriate thickness can provide a good foundation for later implant restoration; and the fibula has dual blood supply and is easy to ...

AI Technical Summary

Problems solved by technology

[0003] At present, the fibula reconstruction jaw model is an integral fixed model, but because of the inability to achieve assembly and its immovability, when the fibula is cut according to the fibula osteotomy guide plate made by using the fixed model, the cut fibula segment is in the process of reconstructing the jaw defect , the rotation angle cannot be consistent with the preoperative design, and the angle of fibula reconstruction can only be judged by the doctor's experience. Therefore, the cut fibula cannot be perfectly matched when reconstructing the jaw, so it cannot be better adapted to the alveolar of the jaw crest, increasing the difficulty of postoperative denture restoration

[0004] Furthermore, in the process of cutting the fibula, in order to ensure the accuracy of the fibula cutting, it is necessary to fix the fibula osteotomy guide plate on the fibula, and this osteotomy guide plate is generally realized by positioning holes and screws on the guide plate and the fibula. There is a big disadvantage in the existing osteotomy guide plate, please refer to the attached figure-3, when the fibula is cut off and reconstructed on the jaw, a titanium plate is needed to fix the position, and when the titanium plate fixes the position of the fibula, Fixation is achieved through the positioning holes on the titanium plate and titanium nails. Since the positioning holes on the osteotomy guide plate are randomly set, they cannot correspond to the positioning holes on the titanium plate. At this time, it is necessary to reconstruct the jaw bone in the fibula , the second drilling is performed to fix the fibula segment on the reconstructed titanium plate. The second drilling of the fibula not only increases the time of jaw reconstruction surgery, but also reduces the accuracy of jaw reconstruction surgery

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