Medical yoke type inner ball joint micro contact plate screw system

Abstract

The invention provides a medicinal shackle type inner ball joint micro-contact steel plate screw system. The system comprises a ball universal screw and a ball impression steel plate which are used for fixing a skeleton, and clamp blocks and connecting lock pins which are used for fixing the ball universal screw and the ball impression steel plate, wherein the body of the ball universal screw is screwed into the skeleton to be fixed, the ball impression steel plate and the ball universal screw are connected and fixed into a whole through the clamp blocks and the connecting lock pins, and a gap is reserved between the ball impression steel plate and the skeleton. After the system is implanted, an external fixator sample effect can be realized, the ball impression steel plate does not make direct contact with the skeleton to be fixed, stress shielding effect is reduced, local blood supply of the skeleton is protected, and the occurrence of osteoporosis, bone ununion and other complications is reduced; the ball universal screw can be fixed in any direction in the skeleton, and the locking strength between the ball impression steel plate and the ball universal screw is not affected; the structure is simple, and operation is convenient.

Description

technical field [0001] The invention belongs to the technical field of medical devices, in particular to a medical shackle type inner ball joint micro-contact plate screw system. Background technique [0002] The most common clinical treatment method for fractures is the plate and screw internal fixation technology. The traditional plate and screw system is to fix the plate through the screw in the bone and squeeze the fixed bone tightly, which can destroy the fracture site and adjacent areas. The blood supply of the site affects the healing process of the bone, and complications such as delayed union and disconnection are prone to occur. Moreover, too strong internal fixation can form the so-called stress shielding effect, so that the normal local stress conduction of the fracture does not pass through the bone, but conducts through the plate and screw, which can cause local osteoporosis, further affect the local fixation strength, and increase the risk of refracture. , pl...

AI Technical Summary

Problems solved by technology

[0002] The most common clinical treatment method for fractures is the plate and screw internal fixation technology. The traditional plate and screw system is to fix the plate through the screw in the bone and squeeze the fixed bone tightly, which can destroy the fracture site and adjacent areas. The blood supply of the site affects the healing process of the bone, and complications such as delayed union and disconnection are prone to occur

Moreover, too strong internal fixation can form the so-called stress shielding effect, so that the normal local stress conduction of the fracture does not pass through the bone, but conducts through the plate and screw, which can cause local osteoporosis, further affect the local fixation strength, and increase the risk of refracture. , plate screw fracture and other complications

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