Fusion cage

A fusion device and extension technology, which is applied in the field of medical supplies, can solve problems such as mismatching mechanical properties, high elastic modulus, and vertebral body subsidence, and achieve the effects of improving recovery, reducing elastic modulus, and reducing stress concentration

Pending Publication Date: 2021-12-10
AFFILIATED HOSPITAL OF YOUJIANG MEDICAL UNIV FOR NATTIES +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

With the clinical application, the shortcomings of the existing titanium alloy fusion cages are gradually revealed: the existing titanium alloy fusion cages have a high elastic modulus (110GPa) due to unreasonable structural design, and mechanical properties will not match, resulting in A large amount of stress is concentrated on the implant body, and problems such as subsidence and loosening of adjacent vertebral bodies are prone to occur after surgery

Method used

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Embodiment 1

[0032] refer to figure 1 and Figure 7 As shown, the overall structural optimization of the structural unit can be obtained by parametric design, that is, the structure and relative positional relationship between the lower substrate 111 and the extension part 112 in this embodiment can be obtained by parametric design, and the parametric formula is: Among them, L is the size parameter of the pore unit, and C is the porosity parameter. The structural unit formed by modeling using this parametric formula has a spherical base 111, and several extensions 112 are evenly distributed along the outer circumference of the spherical base 111. Two adjacent The structural units are connected by extensions 112, and several structural units are connected to form a flat porous structure. It should be noted that the connection between the two extensions 112 of two different structural units is also smooth. Connection, that is, the porous structure inside the porous structure is smooth and ...

Embodiment 2

[0034] refer to figure 2 and Figure 7 As shown, the overall structural optimization of the structural unit can be obtained by parametric design, that is, the structure and relative positional relationship between the lower substrate 111 and the extension part 112 in this embodiment can be obtained by parametric design, and the parametric formula is: Wherein, L is the size parameter of the pore unit, and C is the porosity parameter. For the structural unit formed by modeling with this parameterized formula, at least two adjacent extensions 112 on the same substrate 111 intersect and surround the surface of the substrate 111. A pore structure is formed, that is, a single structural unit has at least one pore structure. When several structural units are combined to form the main body 10 of the porous structure, a pore structure may be formed between two adjacent structural units, or no pores may be formed. structure, in this embodiment, the side of the extension part 112 that...

Embodiment 3

[0036] refer to image 3 and Figure 7 As shown, the overall structural optimization of the structural unit can be obtained by parametric design, that is, the structure and relative positional relationship between the lower substrate 111 and the extension part 112 in this embodiment can be obtained by parametric design, and the parametric formula is: Wherein, L is the size parameter of the pore unit, and C is the porosity parameter; in the structural unit formed by modeling with this parameterized formula, eight extensions 112 extend outward from the outer surface of the matrix 111 respectively, and the eight extensions 112 Uniformly distributed along the circumference of the sphere, specifically, the extension portion 112 includes a cylindrical portion and a vertebral portion, one end of the cylindrical portion is smoothly connected to the base 111, and the other end is smoothly connected to the vertebral portion, and the vertebral portion has a first end surface, a second ...

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Abstract

The invention relates to the technical field of medical supplies, in particular to a fusion cage. The fusion cage comprises a main body which is a flat porous structural body and is composed of a plurality of structural units, wherein each structural unit comprises a base body and a plurality of extension parts extending from the surface of the base body, and the surface of the base body and/or the surfaces of the extension parts are formed by smooth connection of a plurality of curved surfaces; and the porosity of the main body is higher than 40%. The fusion cage is a flat porous structural body composed of a plurality of structural units, the porosity of the overall structure of the fusion cage is controlled by utilizing parameterized design, the elastic modulus of the fusion body is effectively reduced, and secondly, each structural unit comprises the base body and a plurality of extension parts extending from the surface of the base body, the surface of the base body and/or each extension part are/is formed by smooth connection of a plurality of curved surfaces, so that the problem of stress concentration is effectively solved due to the design, cell adhesion is also facilitated, and the postoperative recovery effect of a patient is improved.

Description

technical field [0001] The invention relates to the technical field of medical supplies, in particular to a fusion device. Background technique [0002] Polyetheretherketone (PEEK) fuser was developed by French Scient'X company and used clinically in 1997. Polyether ether ketone is a thermoplastic polymer with high strength, high stiffness, corrosion resistance, hydrolysis resistance and other mechanical properties, and also has good biocompatibility. However, the osteogenic performance of the surface of polyether ether ketone cage As a result, scientists have developed metal fusion devices in a targeted manner. [0003] After experimental research, it was found that titanium alloy (Ti6Al4V) has strong fatigue resistance and corrosion resistance compared with other metals. Titanium alloys also have good biocompatibility. When titanium metal is implanted into animals, titanium alloys have less rejection than other metals. With the clinical application, the shortcomings of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/44A61F2/30G06F30/20
CPCA61F2/4455A61F2/30771G06F30/20A61F2002/30784A61F2/447A61F2/442
Inventor 唐毓金刘佳吕玉廷刘国浩王炳皓王立强
Owner AFFILIATED HOSPITAL OF YOUJIANG MEDICAL UNIV FOR NATTIES
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