A method for manufacturing a personalized acetabular cup with bone defect repair function

Abstract

The invention discloses a method for making a personalized acetabular cup with the function of repairing bone defects, which is characterized in that it comprises the steps of: 1) establishing a three-dimensional model of a hip bone; 2) extracting a solid structure model of a curved surface; 3) stretching a solid structure model of a curved surface The curved surface of the concave part makes the concave part of the curved surface filled; 4) Obtain the inner surface of the acetabular cup and the mounting hole of the countersunk head; 5) Trim the stretched part around the curved surface solid structure model and then round the corners to finally obtain the retention structure, Two evenly distributed retention holes were obtained on the retention structure by stretching and removing the material; 6) Repair, add support, slice and layer the curved surface solid structure model obtained in step 5; 7) 3D print to manufacture a personalized hip acetabular cup. Since the prepared acetabular cup is customized according to the patient's own bone condition, there is no need to grind the acetabulum in advance, which can avoid bone loss and reduce damage. At the same time, it can simultaneously fill and repair the bone defect in the patient.

Description

technical field [0001] The invention relates to the technical field of medical supplies, in particular to a method for manufacturing a personalized acetabular cup with a function of repairing bone defects. Background technique [0002] Hip replacement surgery has become a reliable treatment after many years of clinical practice. Among them, total hip arthroplasty requires the acetabular cup and the femoral stem to be used together. Improper matching angle or installation position may cause serious accidents such as dislocation of the acetabular cup. In clinical practice, the installation anteversion angle of the acetabular cup is usually set between 10° and 20°, and the abduction angle is between 40° and 50°. During the operation, the doctor uses the acetabular reamer to use the measuring tool to grind the acetabular cup installation socket according to his own clinical experience, and then place the acetabular cup. For patients with bone defects, bone grafting is required...

AI Technical Summary

Problems solved by technology

During the grinding process, bone damage and bone loss will be caused. At the same time, it is very easy to affect the patient's postoperative rehabilitation and joint activities due to the doctor's surgical error during grinding.

Affected by traditional processing techniques, the acetabular cup is mostly in a regular shape, which does not fit well with patients with special conditions such as bone defects or bone deformities, and additional surgery such as bone grafting is required

The operation is complicated and the recovery time of the patient is relatively long