Single condyle replacement guiding template and use method thereof

Abstract

The invention provides a single condyle replacement guiding template and a use method thereof. The single condyle replacement guiding template comprises a femur prosthesis guiding template, a tibia prosthesis guiding template and a plurality of first fine connected columns, wherein a femur prosthesis guiding groove is formed in the femur prosthesis guiding template, a cover plate is arranged on the outer side surface of the femur prosthesis guiding template, and a pair of guiding holes is formed in one side of the cover plate; a tibia prosthesis guiding plane is arranged at the upper end of the tibia prosthesis guiding template, and a tibia prosthesis longitudinal guiding groove is formed in one side of the tibia prosthesis guiding plane; and the central axis of the femur prosthesis guiding groove is perpendicular to the tibia prosthesis guiding plane. The single condyle replacement guiding template disclosed by the invention is simple in structure, is made through 3D printing, and isconvenient to joint to skeletons of a patient; and the central axis of the femur prosthesis guiding groove is perpendicular to the tibia prosthesis guiding plane, so that an implanted femur prosthesisand an implanted tibia prosthesis keep perpendicular, the surgery difficulty is reduced, and the surgery accuracy is increased. The use method is simple and easy to operate, and a beginner or a surgeon having little experience can smoothly complete the surgery through the single condyle replacement guiding template.

Description

technical field [0001] The invention relates to the medical field, in particular to a guide template for unicondylar replacement and its application method. Background technique [0002] Unicompartmental knee arthroplasty refers to the surface replacement of only the medial or lateral compartment of the knee joint, which is mainly used for the treatment of osteoarthritis or osteonecrosis confined to a single compartment. [0003] In unicondylar knee arthroplasty, if a fixed platform prosthesis is selected, a femoral prosthesis needs to be implanted on the lower end of the femur, and a tibial prosthesis should be implanted on the same side as the upper end of the tibia. The operational difficulties lie in: [0004] (1) When the tibial prosthesis is implanted, it is necessary to cut off the diseased tissue at the upper end of the tibia first, and grind out a plane for implanting the tibial prosthesis. This plane generally requires a sagittal retroversion of 5-7°. More than 12...

AI Technical Summary

Problems solved by technology

[0005] (2) The femoral prosthesis and the tibial prosthesis are two prostheses that cooperate with each other. It is generally required that the central axis of the femoral prosthesis is relatively perpendicular to the upper plane of the tibial prosthesis, and the error is within 6°, and it should be kept on the tibial prosthesis Near the midpoint, if it exceeds this range, it will affect the effect of the operation, and in severe cases, it will lead to the failure of the operation

[0006] In the prior art, although there have been guides for cutting off diseased tissue, grinding planes and implanting tibial prostheses when the tibial prosthesis is implanted, such guides are complex in structure and troublesome to install, which increases the surgical cost. The workload and difficulty of the work; in addition, there is no such thing in the prior art that can guide the femoral prosthesis and the tibial prosthesis at the same time, control the relative perpendicularity between the central axis of the femoral prosthesis and the upper plane of the tibial prosthesis and maintain the neutral position guide, so it is difficult to control relative verticality, especially for novice or inexperienced operators

Images