MEMORY ALLOY AUTO-DISTRACTION LOCKING TYPE INTERBODY FUSION CAGE AND APPLICATION METHOD THEREFOR

摘要

A memory alloy auto-distraction locking type interbody fusion cage, consisting of a main body, auto-distraction holes, locking teeth, holding holes and a bone grafting hole. The auto-distraction holes are symmetrically provided at two sides of the main body; the locking teeth are symmetrically provided at the upper and 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 side of the main body; the bone grafting hole is located in the center of the main body, and the shape of the bone grafting hole is consistent with that of the main body and takes the inner edge of the main body as a boundary. The auto-distraction locking type interbody fusion cage is made of medical memory alloy. During use, the locking teeth are pressurized at a low temperature, and after the bone grafting hole is filled with a bone grafting material, a holder is used for clamping the holding holes to enable the auto-distraction locking type interbody fusion cage to enter a targeted intervertebral space through an operative route; after rewarming, the 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 targeted intervertebral space to complete distraction, pressurization and locking stabilization of the intervertebral space of lumbar vertebra, such that the purpose of distracting and fixing vertebral bodies of the adjacent segments of the intervertebral space is achieved, and the operation is simple.