Cuttable Fibula reconstruction jaw defect model and manufacturing method and application thereof

Abstract

The invention discloses a cuttable fibula reconstruction jaw defect model and a manufacturing method and application thereof. The model comprises a jaw defect model body and a fibula model body, the manufacturing method comprises the following steps: constructing a complete jaw simulation model and fibula simulation model by utilizing CT scanning and medical software; designing a fibula section which is most suitable for reconstructing the diseased jawbone through a reconstruction and simulated excision method; and printing the jaw defect model body and the fibula model body through a 3D printing technology. The application comprises the following steps: manufacturing a fibula osteotomy reconstruction composite guide plate required for fibula cutting by utilizing the cuttable fibula reconstruction jaw defect model; according to the invention, the fibula can be cut more accurately, so that the reconstructed jaw can better recover the facial appearance of a patient, thus accurately adapting to the alveolar ridge of the jaw and better repairing the false tooth after an operation; the osteotomy reconstruction composite guide plate can overcome the defect of secondary punching on the fibula, and the operation precision is improved.

Description

technical field [0001] The invention relates to the field of oral and maxillofacial-head and neck surgery, in particular to a model capable of truncating a fibula to reconstruct a jaw defect and a manufacturing method and application thereof. 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. For this disease, oral and maxillofacial surgeons in most hospitals in China are currently performing such operations. The steps are to observe the lesion area through the CT taken by the patient, reconstruct the three-dimensional model through professional medical software and formulate the corresponding operation plan, and then cut out the normal bone in the human body to reconstruct the jaw bone. When selecting the bone, the fibula is The bone volume is sufficient and the thickness is appropriate, which can provide a good foundation f...

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Problems solved by technology

[0003] At present, the fibula reconstructed jaw model is an integral and seamless fixed model. Due to the difficulty of truncation, in the 3D printed fibula reconstructed jaw defect model, it is difficult to transfer the pre-bent reconstructed titanium plate screw channel to the fibula osteotomy On the guide plate, it is difficult to realize that the rotation angle of the fibula reconstruction is consistent with the preoperative design, and the rotation degree of the fibula reconstruction can only be judged by the doctor's experience, so the cut fibula cannot be perfectly matched when reconstructing the jaw, so it cannot be better The adaptation of the alveolar ridge of the jaw increases 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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