Construction method of individualized mandible defect reconstruction guide plate system

Abstract

The invention relates to a construction method of an individualized mandible defect reconstruction guide plate system. According to the invention, a postoperative mandible model is designed and reconstructed according to the mandible ideal reconstruction form; a virtual individualized titanium plate model is designed; mandible positioning nail paths are designed at the corresponding positions of the titanium plate model and the mandible remaining bone section models on the two sides; supply area bone section positioning nail paths are designed at the positions, corresponding to all supply areabone sections, of the titanium plate model, a mandible osteotomy guide plate model is designed, a supply area bone osteotomy shaping guide plate model is designed, and an individualized titanium plate, a mandible osteotomy guide plate and a supply area bone osteotomy shaping guide plate of a solid body are manufactured through 3D printing. The accurate positioning between the individualized guideplate system and the lower jawbone of the patient can be better achieved, the construction process of the optimized guide plate system is easier, more convenient and more efficient, and accurate positioning of matching between remaining bone sections of the lower jawbone, all bone cutting sections of a supply area bone and a titanium plate can be achieved.

Description

technical field [0001] The invention belongs to the technical field of mandibular defect reconstruction medical devices, in particular to a construction method of an individualized mandibular defect reconstruction guide plate system. Background technique [0002] The mandible is the only movable bone in the maxillofacial region. It plays a key role in chewing, swallowing and speaking. It is located in the lower third of the face and is closely related to the beauty of the face. Because of many maxillofacial diseases, such as oral cancer, osteoporosis, osteomyelitis and bisphosphonate-related osteonecrosis of the jaw, or because of severe maxillofacial trauma, mandibular defects have seriously affected the function and function of the mandible. Facial morphology, usually requiring serial resection of the mandible. Mandibular defect reconstruction is a complex and time-consuming task for surgeons. [0003] Continuous reconstruction of the mandible and its soft tissue coverag...

AI Technical Summary

Problems solved by technology

[0007] First, the pre-bent titanium plate was pre-bent according to the mandibular model. Due to the difference in clinical experience of surgeons, there were human errors, and some titanium plates could not fully fit the reconstructed mandibular bone surface.

During the operation, when the titanium plate is in contact with the remaining bone segment of the patient’s mandible, it will slide. During the fixation, the position of the titanium plate during the operation cannot be kept consistent with the position of the titanium plate during the design, resulting in positioning errors of the titanium plate implantation.

[0008] Second, due to the problem that the pre-bent titanium plate cannot fully fit the mandible model, the subsequent titanium nail hole positioning, mandibular osteotomy guide plate fabrication, and fibula osteotomy guide plate fabrication are all based on this pre-bent titanium plate , will cause deviations in the fabrication of the follow-up guide plate system, affect the precise implementation of the operation, and then affect the surgical treatment effect of mandibular defect reconstruction, and are prone to postoperative complications such as occlusal dysfunction, facial widening, and temporomandibular joint dislocation.

On the one hand, the production process requires a second scan, which is time-consuming; on the other hand, the data obtained by the second scan will increase the error of nail hole positioning due to metal artifacts or low imaging resolution.

[0010] Fourth, the existing fibula osteotomy guide simply locates the osteotomy length and position of different bone segments. When transferring the free fibula to the mandibular defect, the surgeon still needs to spend time adjusting the fibula according to his own clinical experience. The shape of the osteotomy surface of each bone segment removes the early contact surface and matches with the titanium plate. The titanium plate and the fibula segment cannot be accurately positioned, and there is a large error

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