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Lumbar internal fixation system and composite connecting rod thereof

A composite connection and fixation system technology, applied in the field of medical devices, can solve problems such as poor application effects, achieve the effect of reducing the number, reducing the incidence of diseases, and improving the quality of life after surgery

Pending Publication Date: 2022-03-01
SHANDONG UNIV QILU HOSPITAL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The elastic modulus range of the rod material is: 35-60GPa; the strength of the rod material is 800-1000MPa, it has the disadvantages of common material and simple design, and the clinical application effect is poor

Method used

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  • Lumbar internal fixation system and composite connecting rod thereof

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Effect test

Embodiment Construction

[0020] Please check figure 1 , a lumbar internal fixation system, including a screw and a composite connecting rod 1, the screw is attached to the composite connecting rod 1, the screw can be fixed on the lumbar pedicle, the structure of the lumbar internal fixation system can refer to the prior art.

[0021] The composite connecting rod 1 has a rigid section 11 arranged in the length direction, a semi-rigid section 13 and a transition section 12 between the rigid section 11 and the semi-rigid section 13. The elastic modulus of the transition section 12 is between the elastic modulus of the semi-rigid section 13. Between the amount and the modulus of elasticity of the rigid section 11. The modulus of elasticity of the rigid section 11 is 55Gpa, the modulus of elasticity of the semi-rigid section 13 is 3500Mpa, and the modulus of elasticity of the transition section 12 is set gradually from the rigid section 11 to the semi-rigid section 13, such as linearly decreasing, the tran...

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Abstract

The invention discloses a lumbar vertebra internal fixation system and a composite connecting rod thereof, the composite connecting rod is provided with a rigid section, a semi-rigid section and a transition section located between the rigid section and the semi-rigid section, the elasticity modulus of the transition section is between the elasticity modulus of the semi-rigid section and the elasticity modulus of the rigid section, and the composite connecting rod is integrally formed by nickel-titanium shape memory alloy. The composite connecting rod has the following advantages: the composite connecting rod adopts the unique design of integration, two rigidities and transition section connection, the rigid section is used for a fusion section with more serious middle degeneration, the semi-rigid section is used for a fixed section without rigid fusion, and the transition section firmly connects the rigid section and the semi-rigid section together, so that the number of rigidly fixed sections can be reduced, and the cost is reduced. And the transition section can realize a direct pressure transmission mode, so that the pressure transmission capability can be improved, the excessive compensation of the adjacent sections can be reduced, the degeneration of the adjacent sections can be slowed down, and the fusion rate of the fusion sections can be improved.

Description

technical field [0001] The invention relates to a medical device, in particular to a lumbar internal fixation system and a composite connecting rod thereof. Background technique [0002] At present, the "golden method" for a variety of lumbar degenerative diseases is lumbar fusion and fixation, but existing studies have shown that lumbar fusion and fixation will accelerate the degeneration of adjacent segments of the fixed segment, and the longer the fusion and fixed segment, the adjacent segments Segmental degeneration is more severe. For two-segment or multi-segment fusion and fixation, one of the current methods to slow down the degeneration of adjacent segments is to use lumbar hybrid surgery, that is, to use rigid fusion and fixation for the segment with more serious degeneration itself, and for mild or moderate Non-rigid fixation without fusion is used for highly degenerated segments. In this way, the diseased segment can be fixed and the compensatory effect of adjace...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/70
CPCA61B17/7071A61B17/7094A61B2017/7073
Inventor 王连雷王协彬刘新宇张煜宸原所茂田永昊
Owner SHANDONG UNIV QILU HOSPITAL
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