Tibia base element and knee joint prosthesis

Abstract

The invention discloses a knee joint prosthesis and a tibia base element. The tibia base element comprises a base and a main column fixed to the bottom of the base, wherein a guide channel is arranged in the base and the main column, a locking mechanism is arranged on the upper portion of the guide channel, the locking mechanism is provided with a through hole, a front cruciate ligament penetrates through the through hole, a sealing rod used for sealing a low end opening of the guide channel is installed at the lower end of the main column, and the sealing rod enables the front cruciate ligament which penetrates through the through hole to be fixed twice and then be sealed in the guide channel. By means of the tibia base element, it is avoided that a bone tunnel used for fixing the front cruciate ligament is formed in the tibia side of a human body, an injury to a tibia is mitigated, and the tibia base element can be repaired conveniently in the future; meanwhile, due to the fact that the front cruciate ligament does not need to be fixed to the tibia and is fixed to the inside of the tibia base element instead, the requirement for the bone substance of the tibia is greatly lowered, and the tibia base element can be suitable for a wide crowd.

Description

technical field [0001] The invention relates to a knee joint prosthesis, in particular to a knee joint prosthesis and a tibial base component which preserves the posterior cruciate ligament while reconstructing the anterior cruciate ligament. Background technique [0002] The concept of knee prosthesis design is generally based on the same principle, that is, to provide a biomechanical movement pattern similar to a normal knee joint with implanted knee joint components, and to achieve static and dynamic motion with the help of the implant itself and the balance of knee ligaments and soft tissues. stability. These knee components are designed to restore natural human knee motion, as well as to adjust and control the forces generated during knee flexion and extension. But all current knee prosthesis designs fall short of this standard. [0003] A traditional knee joint prosthesis mainly includes a femoral component for combining with the femur, a tibial base component for co...

AI Technical Summary

Problems solved by technology

However, this kind of knee joint prosthesis still has some shortcomings: in some designs, the position of the anterior cruciate ligament has changed, and it is not at the position of the anatomical attachment point of the anterior cruciate ligament located in the human tibia, and these designs will make the After the replacement of the prosthesis, the patient cannot recover the proprioception; there are also some designs that open holes on the tibial base platform and the liner to pass through the anterior cruciate ligament. The upper end of the anterior cruciate ligament is fixed to the human femur, and the lower end is fixed to the human tibia. During the activity, the angle and length of the anterior cruciate ligament will change, which will cause the ligament to wear and tear when passing through the tibial base platform or in the pad, and in severe cases, the anterior cruciate ligament can be broken, and the pad is usually made of polymer material Manufacturing, grinding will occur in the wear process; in some other designs for reconstructing the anterior cruciate ligament, such as some of the applicant's previous applications, a boss is set on the tibial base, which can restore the anterior cruciate ligament in the tibia The location of the anatomical attachment point and effective fixation are achieved. At the same time, the insertion point of the anterior cruciate ligament is located in front of the platform after one fixation, so the anterior cruciate ligament will not wear out on the prosthesis, thereby increasing the service life of the ligament. However, in reconstruction In the case of the anterior cruciate ligament, a bone tunnel needs to be made on the tibial side for secondary fixation of the anterior cruciate ligament, which not only causes some damage to the tibial side, but also is not conducive to the revision of the knee prosthesis in the future. The middle anterior cruciate ligament is constantly pulled and twisted, which will cause the secondary fixation of the anterior cruciate ligament on the tibia to be unreliable and prone to loosening or damage; at the same time, this secondary fixation method has higher requirements on the bone quality of the tibia , the applicable population has certain limitations

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