Non-merging cervical vertebra intercalated disc prosthesis and assembly method thereof

A cervical intervertebral disc, non-fusion technology, applied in the direction of spinal implants, etc., can solve the problems of low polymer strength, limit the service life of the prosthesis, and poor wear resistance, and achieve good fatigue resistance, simple structure, and high stability Effect

Pending Publication Date: 2019-07-19
FUZHOU UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the polymer has low strength and poor wear resistance, which limits the service life of the prost

Method used

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  • Non-merging cervical vertebra intercalated disc prosthesis and assembly method thereof
  • Non-merging cervical vertebra intercalated disc prosthesis and assembly method thereof
  • Non-merging cervical vertebra intercalated disc prosthesis and assembly method thereof

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0030] like Figure 1-8 As shown, a non-fused cervical intervertebral disc prosthesis includes an upper endplate and a lower endplate made of cobalt-chromium-molybdenum alloy material. The lower endplate is a shell with an unclosed upper end, and a spherical cavity is arranged in the shell , the spherical cavity is provided with a spherical nucleus made of metal rubber. The spherical nucleus is wrapped in the spherical cavity to prevent the spherical nucleus from prolapse. The lower end of the nucleus is sleeved on the guide rail. The lower surface of the spherical nucleus is a horizontal plane. The diameter of the horizontal plane is smaller than the diameter of the spherical nucleus. The cross-shaped chute is matched with the cross-shaped guide rail. There is a gap of 1mm between the cross chute and the cross-shaped guide rail. The upper end...

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Abstract

The invention relates to a non-merging cervical vertebra intercalated disc prosthesis and an assembly method thereof. The non-merging cervical vertebra intercalated disc prosthesis comprises an upperendplate and a lower endplate, wherein the lower endplate is a housing of which the upper end is not closed; a spherical cavity is formed in the housing; a spheroidal pulpy nucleus prepared from metaland rubber is arranged in the spherical cavity; a cross guide rail is vertically mounted in the middle part of the inner bottom of the housing; the lower end of the spheroidal pulpy nucleus is arranged on a guide rail in a sleeving manner; the upper endplate is located above the lower endplate; a C-shaped sleeving rod is arranged on the lower side surface of the upper endplate, and sleeves the outer surface of the spheroidal pulpy nucleus; and arc-shaped notches for giving ways to two ends of the C-shaped sleeving rod are arranged at the middle parts of the left side and the right side of theinner part of the spherical pulpy nucleus. The non-merging cervical vertebra intercalated disc prosthesis disclosed by the invention is simple in structure and reasonable in design, and the problem that in a conventional artificial cervical vertebra intercalated disc replacement technique, a common prosthesis cannot meet double requirements of cervical vertebra biological mechanics for an elasticity function and a moving function is solved.

Description

technical field [0001] The invention relates to a non-fused cervical intervertebral disc prosthesis and an assembly method thereof, belonging to the field of medical devices. Background technique [0002] The artificial intervertebral disc prosthesis currently used clinically is mainly a composite prosthesis. The first type is a combination of metal structure and metal structure, but the elastic modulus of the metal material is much higher than that of cortical bone, which may easily cause excessive stress on the artificial intervertebral disc and adjacent vertebral bodies, resulting in subsidence and loosening of the prosthesis Or prolapse, and the rigid connection of metal to metal cannot play the role of shock absorption and buffering, and loses the main function of buffering and shock absorption of the lumbar intervertebral disc. However, metal materials are still used to make artificial joint materials because of their fatigue resistance, high strength and good biocomp...

Claims

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Application Information

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IPC IPC(8): A61F2/44
CPCA61F2/442
Inventor 任志英黄静飞白鸿柏徐杰郑孝源张振
Owner FUZHOU UNIVERSITY
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