3D printing individualized customized bionic micropore acetabulum mortise and tenon patch and manufacturing method

Abstract

The invention relates to a 3D printing individualized customized bionic micropore acetabulum mortise and tenon patch and a manufacturing method, the mortise and tenon patch is of a 3D printing solid structure, the upper edge and the lower edge of the inner side face are connected with one side edge of the upper surface and one side edge of the lower surface respectively to form a tenon structure embedded into the acetabulum bone defect position. The upper edge and the lower edge of the outer side surface are respectively connected with the other side edges of the upper surface and the lower surface to form an integral mortise and tenon patch structure in a surrounding manner; the lower surface is arc-shaped, and the radian of the lower surface is the same as that of an acetabular cup prosthesis; through the arrangement of the four forms of threaded holes, multi-angle fixation of the mortise and tenon patch can be guaranteed, the stability is guaranteed to the maximum extent, and sideslip or displacement is prevented. And through bone-like trabecular bionic micropores are formed in the mortise and tenon patch. The problems that in the acetabular bone defect reconstruction process in the prior art, the rotation center of a hip joint cannot be recovered easily, an implant and a bone defect form are not matched, bone ingrowth of the implant is poor, and initial and long-term stability is poor are solved.

Description

technical field [0001] The invention relates to an acetabular reconstruction patch, in particular to an acetabular mortise and tenon patch with a bionic microporous structure that is individually customized based on 3D printing and a manufacturing method thereof. Background technique [0002] Hip dysplasia is one of the common causes of secondary hip arthritis. When clinical symptoms appear and affect the patient's quality of life, total hip replacement is the ultimate treatment. However, patients with hip dysplasia have abnormal acetabular morphology, such as bone defects outside and above the acetabulum, bone loss around the acetabulum, etc. on the challenge. At present, the commonly used methods of acetabular reconstruction in total hip arthroplasty for dysplasia of the hip mainly include acetabular cup high rotation center placement technique, acetabular invagination technique, acetabular structural bone grafting technique, and acetabular titanium mesh combined with pr...

AI Technical Summary

Problems solved by technology

[0003] 1. Placement of the high rotation center of the acetabular cup and acetabular invagination technology cannot preserve and increase the bone mass around the hip, and cause the normal hip joint rotation center to shift, significantly change and increase the force on the hip joint, and increase the loosening of the acetabular prosthesis. failure rate

[0004] 2. Acetabular structural bone graft technology and titanium mesh combined with pressure bone graft technology have problems such as non-union of grafted bone, bone resorption, collapse, bending and breaking of titanium mesh, which easily lead to loosening and displacement of the acetabular prosthesis

[0005] 3. Although the acetabular block can fill and repair the acetabular bone defect in situ, the existing acetabular block mainly has the following disadvantages: (1) It is a finished product that is processed and manufactured in advance according to the standardization of drawings, with a single structure and fixed size. For acetabular bone defects with complex shapes, it cannot be well matched, and it cannot be flexibly adjusted according to needs during the operation; the contact surface of the acetabular spacer and the acetabular bone is mostly hemispherical, which is not easy to fix, and is prone to displacement, so the acetabular cup cannot be supported. Sufficient support will affect the stability of the acetabular prosthesis; (2) the surface spraying process, the bone ingrowth is poor, and it is easy to cause the loosening of the acetabular spacer during the long-term postoperative movement process, which cannot guarantee the stability of the acetabular prosthesis. Positional stability; (3) Although the biomechanical characteristics of titanium-based materials are similar to those of human bones, and have been widely used in the production of human implants such as acetabular pads, there are still stresses in their inherent mechanical properties such as high elastic modulus. Risk of localized osteolysis, implant loosening due to occlusion

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