Pedicle screw with axial buffer and micro-dynamic functions

Abstract

The invention discloses a novel pedicle screw. Traditional fixed-fusion common single-axis and multi-axis screws in the orthopedic surgery operation are technically transformed on the basis of external springs, so that the screws are applied to the non-fusion operation, and the original simple, practical and low-incisure advantages can be maintained.

Description

technical field [0001] The application of the present invention relates to an implant used in orthopedic surgery instruments, in particular to a microdynamic nail that can be used in non-fusion fixation operations. Background technique [0002] With the deepening of academic research on orthopedic surgery, the traditional rigid fixation and fusion in clinical practice gradually lead to a new branch, that is, non-fusion fixation, also known as dynamic fixation, and the non-fusion fixation used in conjunction with , is called a dynamic nail. However, the dynamic nails currently used clinically are complex in processing, more in structure, too high in notches, and less stable in performance compared to the traditionally used rigid fusion fixation nails; CN 202136405U, titled "micro-incremental support pedicle screw", is an obvious case; [0003] In addition, among the various dynamic nails that are gradually being used clinically, for example, the authorized announcement numb...

AI Technical Summary

Problems solved by technology

However, the dynamic nails currently used clinically are complex in processing, more in structure, too high in notches, and less stable in performance compared to the traditionally used rigid fusion fixation nails; CN 202136405U, titled "micro-incremental support pedicle screw", is an obvious case;

[0003] In addition, among the various dynamic nails that are gradually being used clinically, for example, the authorized announcement number is CN20108568Y, and the name is "pin shaft type spinal rod fixation nail", which does not have the function of the adjustable nail head of the "universal nail". , and there is no buffer zone in the axial direction, that is, the Z-axis direction; while other dynamic nails with internal springs can form an appropriate buffer zone, but in clinical practice, each vertebral body to be operated on usually In all cases, two nails are implanted, and the coronal projection of the two nails and the vertebral body is trapezoidal, so the Z-axis direction of the nails is restricted, and the role of the buffer zone presented is also affected;

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