Production method of 3D printing fibula reconstruction jaw surgical tool combining bone excision with titanium-plate positioning

Abstract

The invention discloses a production method of a 3D printing fibula reconstruction jaw surgical tool combining bone excision with titanium-plate positioning. The method comprises the steps that a jawthree-dimensional model and a fibula three-dimensional model are reconstructed; according to the lesion range, the jaw osteotomy plane is determined, and an expected jaw model is designed; a preforming titanium plate is fixed to the target portion of an expected jaw model entity and subjected to secondary scanning; a titanium plate-expected jaw composite model and a titanium plate model are obtained; the titanium plate-expected jaw composite model, the titanium plate model and an STL file of the expected jaw model are subjected to rectification and alignment; a mandible osteotomy guide plate and a fibula osteotomy guide plate are designed, tack holes in the titanium plate model are correspondingly mapped to the mandible osteotomy guide plate and the fibula osteotomy guide plate, and a special quickly-formed guide plate is formed. According to the produced fibula osteotomy tool, the obtained fibula can be precisely positioned in the tack holes and can be accurately transferred to the jaw according to the design expectation, and the pre-bent titanium plate is used for directly and accurately positioning an acquired bone segment.

Description

technical field [0001] The invention relates to the technical field of jaw surgery tools and jaw functional reconstruction, in particular to a manufacturing method of a 3D printed fibula reconstruction jaw surgery tool combined with bone resection and titanium plate positioning. Background technique [0002] In recent years, digital surgical technology has been widely used in the repair and reconstruction of jaw defects. Through virtual surgery, surgeons can realistically simulate key steps such as lesion resection, graft bone flap preparation and shaping, and move time-consuming and laborious operations such as titanium plate bending to preoperative completion, thus improving surgical accuracy. At the same time, it also greatly improves the operation efficiency. At present, in order to achieve high-precision jaw reconstruction surgery, there are mainly navigation technology and 3D printing surgical guide technology. The former can guide the resection of the lesion and the...

AI Technical Summary

Problems solved by technology

The operator has a lot of subjectivity when performing the operation, and it is often difficult to take into account the accurate restoration of the occlusal relationship and the position of the condyle

[0005] Although some studies tried to manually transfer the titanium plate nail holes on the mandibular osteotomy guide, it was still difficult to restore a good occlusion due to manual operation errors

And because the fibula segment will eventually heal with the jaw bone after transplantation, it is very important to accurately determine the spatial position of the fibular segment, and because the fibula needs to preserve the blood supply structure during the surgical removal process, it is difficult to use the jaw bone guide to prepare nails However, the existing surgical guide plate technology and method cannot transfer the position of the nail hole on the titanium plate to the fibula osteotomy guide plate.

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