Acetabular prosthesis of artificial hip joint with rotational ellipsoid joint interface
An acetabular prosthesis and ellipsoid technology, applied in the field of medical devices, can solve problems such as difficult to realize, increase the difficulty of acetabular prosthesis replacement, and unable to improve the interface mechanics and lubrication performance of spherical hip prosthesis
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[0027] According to the patient's CT images, an artificial hip acetabular prosthesis with a rotational ellipsoidal joint interface was designed to replace the left acetabulum of the patient's hip.
[0028] Such as figure 1 As shown, the first step is to reconstruct the three-dimensional anatomical model of the hip joint according to the CT images of the patient's hip joint, and use the spherical surface to fit the three-dimensional surface of the bony acetabular fossa on both sides. The center of the sphere is set as the origin of the measurement coordinate system of the acetabular prosthesis, and the line connecting the center of the sphere on both sides of the fitted sphere is the X-axis.
[0029] The three-dimensional anatomical shape model includes: the three-dimensional curved surface shape of the bony acetabular socket.
[0030] The second step is to set the plane where the coronal plane of the hip joint is located as the XY plane, the line passing through the origin of...
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