Memory alloy auto-distraction locking interbody fusion cage and application method thereof

Abstract

The invention provides a memory alloy auto-distraction locking interbody fusion cage which consists of a main body, auto-distraction holes, locking teeth, holding holes and a bone grafting hole, wherein the auto-distraction holes are symmetrically formed in two sides of the main body; the locking teeth are symmetrically formed in the upper sides and the lower sides of the auto-distraction holes, and the tooth tips of the locking teeth face outwards; the holding holes are located at the rear part of the main body; the bone grafting hole of which the shape is consistent with that of the main body is formed in the center of the main body and takes the inner edge of the main body as the boundary; and the auto-distraction locking interbody fusion cage is made from medical memory alloy. When the memory alloy auto-distraction locking interbody fusion cage is used, the locking teeth are pressurized at low temperature, and after the bone grafting hole is filled with a bone grafting material, a holder is adopted to clamp the holding holes to enable the memory alloy auto-distraction locking interbody fusion cage to enter through an operative route to be placed in an objective intervertebral space; after rewarming, the auto-distraction holes restore to the shape before pressurizing, and the tooth tips of the locking teeth are inserted into upper and lower vertebral endplates of the intervertebral space to complete distraction, pressurization and locking stabilization, so that the purpose of distracting and fixing vertebral bodies of the adjacent segments of the intervertebral space is achieved, and the operation is simple.

Description

[0001] Technical Field: The present invention relates to the technical field of medical devices, and more particularly to devices and methods of use for stabilizing vertebral members of the spine. Background technique: [0002] Degenerative diseases of the spine and its structural damage are an important cause of neck, shoulder, waist, and leg pain, sensory and motor function impairment or even loss. In the 1950s, Cloward first proposed Posterior Lumbar Fusion (PLIF), which has developed into one of the basic procedures of spinal surgery today. In 1986, Badgy and Kuslich designed an intervertebral fusion device (Cage) suitable for the human body, namely the BAK (Bagby and Kuslich) system. Since then, intervertebral bone graft fusion technology has been greatly developed and has become a basic surgical method for the treatment of spinal degenerative diseases and structural injuries. The design principle of the intervertebral cage (Cage) is based on the distraction-compression ...

AI Technical Summary

Problems solved by technology

However, internal fixation with pedicle screws or steel plates and screws provides sufficient support but also causes stress shielding, which can easily lead to adverse consequences such as osteolysis and osteoporosis.

Moreover, due to the addition of pedicle screw or plate screw fixation, it not only greatly increases the trauma of the operation process, but also increases the possibility of postoperative infection and nerve damage; it also greatly increases the difficulty of the operation, prolongs the operation time and the Moderate blood loss, and bring a heavier economic burden to patients

In addition, due to the restriction of the activity of the vertebral body, it is easy to accelerate the degeneration of adjacent segments, which greatly reduces the quality of life of patients, especially young patients.

Images