6 results about "Acetabulum prosthesis" patented technology

The invention is suitable for the technical field of medical instruments, and provides a universal joint screw for fixing an acetabular prosthesis and a using method thereof.The universal joint screw comprises a main body assembly and a connecting assembly, the main body assembly comprises a screw body and a self-tapping head, and the connecting assembly comprises a first fixing block, a first connecting base, a universal joint, a second connecting base and a second fixing block; the first fixing block and the second fixing block are respectively connected with the screw body and the self-tapping head; the first connecting seat and the second connecting seat are both connected with the universal joint; the universal joint is movably connected with the first connecting base and the second connecting base in a multi-angle rotating mode and used for adjusting the relative position of the screw body and the self-tapping head in the screw screwing-in process. The universal joint is constructed in the long acetabular screw, long-distance fixing of the long screw perpendicular to the acetabular prosthesis is achieved, the mechanical stability of the acetabular prosthesis is improved, the fixing failure risk is reduced, the reoperation probability is reduced, reliable fixing of the rebuilt acetabular prosthesis can be rapidly and accurately completed, the operation efficiency is improved, and postoperative rehabilitation of a patient is accelerated.

Acetabular prosthesis (10) comprising an acetabular cup (12) having a through-opening configured to receive both an iliac stem (11) and a safety cap (13).

This invention discloses a method, device, and medium for acetabular prosthesis angle planning based on safety zone constraints. The method includes: acquiring pelvic image data of a patient in a first posture; constructing a three-dimensional model of the patient's pelvis based on the pelvic image data and obtaining anatomical landmarks, and establishing a pelvic coordinate system based on the anatomical landmarks; acquiring pelvic posture compensation amounts as the patient switches from the first posture to at least one functional posture; determining posture parameters based on the pelvic coordinate system; determining the mapping relationship between the functional anteversion angle and the pelvic posture based on the pelvic posture compensation amounts and posture parameters; determining orientation constraints based on the prosthesis orientation information in the functional posture; and determining the feasible range of posture parameters based on the mapping relationship and orientation constraints. This application uses a geometric constraint solution method to reverse-engineer the feasible range of posture parameters for the static implantation orientation of the acetabular prosthesis, assisting in the completion of personalized and dynamically functionally safe prosthesis angle planning.

The application provides a hip joint prosthesis, which comprises: a hip joint cup, a containing part being arranged in the hip joint cup and being in communication with the outer surface of the hip joint cup; an external fixing part, which is movably arranged in the containing part and has a fixed position extending out of the hip joint cup and a avoiding position in the containing part, and the moving direction of the external fixing part and the axis of the hip joint cup form an acute angle or a right angle; and an operating part, which is arranged on the hip joint cup and is in driving cooperation with the external fixing part to switch the external fixing part between the fixed position and the avoiding position. The technical scheme of the application effectively solves the problem of poor fixing effect of the hip joint cup in the related art.

The application discloses a kind of continuous pelvic tilt posture under acetabular form evaluation method and system, belong to clinical evaluation technical field.Method includes: constructing pelvic three-dimensional model and femur three-dimensional model;Establish pelvic front plane anatomical reference coordinate system;Obtain the double hip axis of refined estimation;Get left and right two optimal acetabular opening planes, take the normal vector of left and right two optimal acetabular opening planes as the initial axis of corresponding side pelvic acetabulum;Construct the rigid body motion model of pelvic acetabular initial axis around the continuous rotation of double hip axis, calculate the change of acetabular axis direction under different pelvic tilt postures and corresponding acetabular anteversion angle, abduction angle;Establish acetabular abduction angle / anteversion angle curve under pelvic tilt, complete acetabular form evaluation.The application realizes the automatic calculation of acetabular space direction and accurate acetabular form evaluation, and lays a foundation for finding the most suitable patient acetabular prosthesis installation angle.

This invention provides a combined hip joint revision filler structure, comprising: an iliac wing assembly, which includes an acetabular cup support and an iliac wing fixation portion integrally formed on the acetabular cup support; the outer side of the acetabular cup support is used to fit and provide support to the patient's acetabular cup, and the inner side of the iliac wing fixation portion is used to fit and fix to the patient's iliac wing; and a filler block, which is fixed to the iliac wing assembly and includes a fusion surface for fitting the patient's hip defect bone from below and a contact surface for fitting the inner side of the acetabular cup support. This invention improves the stability of the fixation structure by fitting and fixing the inner side of the iliac wing fixation portion to the patient's iliac wing, and also improves the convenience of subsequent positioning and screw placement. Simultaneously, the filler block also meets the need to fill hip defect bone, solving the problems of difficult positioning and screw placement of existing pre-made metal acetabular pads, and the inability to fill bone defects, which easily leads to acetabular prosthesis loosening.