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Novel energy-absorbing and shock-absorbing acetabular cup

An acetabular cup, a new type of technology, applied in the field of acetabular cups, can solve the problems of not being able to effectively alleviate the subsidence of the prosthesis, improve aseptic loosening and subsidence of the prosthesis, facilitate cell attachment and proliferation, and relieve false body sinking effect

Inactive Publication Date: 2019-01-11
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hip joint is in a dynamic mechanical environment all the time in people's daily activities, and the highest impact load borne by normal walking gait can reach 2.7 times the body weight. At present, ordinary porous-coated acetabular cups still cannot effectively relieve postoperative prosthesis. sink

Method used

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  • Novel energy-absorbing and shock-absorbing acetabular cup
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  • Novel energy-absorbing and shock-absorbing acetabular cup

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Embodiment Construction

[0013] The present invention will be described in further detail below in combination with specific embodiments.

[0014] refer to figure 2 As shown, the basic method of designing trabecular bone-like porous structural elements with negative Poisson’s ratio by using 3D modeling software is as follows: (1) Design two-dimensional negative Poisson’s ratio structural elements; The prisms are arranged to form a basic unit of a three-dimensional negative Poisson's ratio structure, which is a honeycomb structure in a top view and a concave negative Poisson's ratio structure in a front view and a side view.

[0015] refer to image 3 As shown in Fig. 1, the acetabular cup with negative Poisson's ratio porous structure was designed using 3D modeling software.

[0016] Export the 3D model of the above-designed acetabular cup as an STL format file, set up the corresponding additive manufacturing process according to different metals, and rapidly prototype and manufacture the entity by...

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Abstract

The present patent discloses a novel energy-absorbing and shock-absorbing acetabular cup to improve the deficiency of the existing acetabular cup. The acetabular cup of the invention is characterizedin that under the premise of ensuring mechanical strength, a bone-like trabecular structure with a negative Poisson's ratio effect is introduced into the acetabular cup design, the pore diameter is reasonably designed, the bone growth is promoted, the friction force between the prosthesis and the bone interface is increased, and the biological fixation stability is improved. The introduction of negative Poisson's ratio structure can improve the energy absorption of acetabular cup under dynamic load in vivo, reduce the prosthesis distal bone tissue load, and effectively alleviate the phenomenonof prosthesis sinking. The acetabular cup of the invention has an acetabular outer cup and an acetabular inner cup, which can be designed as a surface porous coating structure or an integral porous structure according to clinical requirements, and the thickness of the porous coating can be set as required. The acetabular cup of the present invention can be manufactured by an augmentation manufacturing technology and can be made of a wide range of materials, such as metals and polymers with good biocompatibility. It has a good application prospect in orthopedic total hip arthroplasty.

Description

technical field [0001] The invention is applied in the field of orthopedic medical devices, and in particular relates to a novel acetabular cup with excellent energy-absorbing and shock-absorbing effects. Background technique [0002] Total hip arthroplasty can accurately reconstruct the anatomical structure of the proximal femur while retaining the original bone quality and physiological structure of the body to the greatest extent, so that the stress distribution at the hip joint is more in line with the physiological requirements, and the postoperative joint mobility is closer to the normal level. It is the preferred method for the treatment of hip joint diseases in clinical practice. However, there are problems in the clinical application of total hip arthroplasty. Postoperative aseptic loosening and prosthesis sinking often occur. [0003] Hip joint prosthesis includes acetabular cup, femoral head and femoral stem. The acetabular cup connects the trunk and lower limbs ...

Claims

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Application Information

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IPC IPC(8): A61F2/34A61F2/30
CPCA61F2/30767A61F2/30771A61F2/30942A61F2/34A61F2002/30772A61F2002/30985
Inventor 樊瑜波王丽珍姚艳宫赫姚杰吕若凡
Owner BEIHANG UNIV
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