Femoral stem prosthesis capable of preventing displacement and loosening
A femoral stem and prosthesis technology, applied in the femoral shaft, femoral head, hip joint, etc., can solve the problem of easy loosening, and achieve the effect of matching stability and avoiding loosening.
Pending Publication Date: 2022-06-07
XIANGYA HOSPITAL CENT SOUTH UNIV
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Problems solved by technology
[0005] The main purpose of the present invention is to provide a femoral stem prosthesis that prevents displacement and loosening, aiming to solve the problem that the existing artificial joint femoral stem prosthesis is prone to loosening after being embedded in the femur
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[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0034] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relationship between various components under a certain posture (as shown in the accompanying drawings). The relative positional relationship, the movement situation, etc., if the specific posture changes, the directional indication also changes accordingly. ...
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The invention discloses a femoral stem prosthesis capable of preventing displacement and loosening. The femoral stem prosthesis comprises a femoral stem neck, a femoral stem and a fixing assembly. The femoral stem comprises a first end and a second end which are opposite to each other; the fixing assembly comprises a first rotating shaft and a first grabbing component. The femoral stem is provided with a long groove extending along the body; according to the femoral stem prosthesis capable of preventing displacement and loosening, the fixing assembly is arranged, the femoral stem is embedded into a femoral medullary cavity, then the first rotating shaft is driven to rotate, the first rotating shaft drives the first rotating rod to rotate, and then the first movable block is driven to move in the axial direction of the first rotating rod; therefore, the first grabbing block is driven to move in the direction perpendicular to the first rotating shaft, that is, the first grabbing block moves in the direction away from the first rotating shaft, so that the first grabbing thorn pierces into the medullary cavity of the femoral bone, the femoral stem is firmly fixed to the femur, the femoral stem is more stably matched with the proximal femoral medullary cavity, and the femoral stem is prevented from being damaged. And the phenomena of loosening, slipping or relative displacement and the like of the femoral stem in the medullary cavity are avoided.
Description
technical field [0001] The invention relates to the technical field of orthopedic medicine, in particular to a femoral stem prosthesis for preventing displacement and loosening. Background technique [0002] The design of the artificial joint prosthesis is related to the changes in the biomechanics of the postoperative bone and joint, and is the key to the stability and functional recovery of the postoperative bone and joint, which directly affects the service life of the prosthesis, the clinical efficacy of the patient, and is related to various complications. Such as postoperative prosthesis loosening, thigh pain and so on. Therefore, scientific and reasonable prosthesis design and implantation methods are very important. [0003] The design of the artificial joint prosthesis should be based on the physiological anatomy of the human skeleton. The design of the femoral stem prosthesis should also be based on the anatomical characteristics of the proximal femur to achieve ...
Claims
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IPC IPC(8): A61F2/36
CPCA61F2/3607A61F2/3662A61F2/3609
Inventor 杨序程朱剑熹
Owner XIANGYA HOSPITAL CENT SOUTH UNIV