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Porous ring-shaped prosthesis for cancellous bone reconstruction

A technology of cancellous bone and prosthesis, applied in the direction of prosthesis, femur, femoral head, etc., can solve the problems of high technical requirements and time-consuming operation, and achieve the effect of overcoming high failure rate, reducing risk and improving curative effect

Pending Publication Date: 2021-01-22
BEIJING JISHUITAN HOSPITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although compression bone grafting has the possibility of reconstructing the patient's bone mass in theory, the risk of intraoperative fracture and postoperative prosthesis subsidence is high, and there are high surgical technical requirements, time-consuming, risk of disease transmission, and bone graft absorption. and other shortcomings

Method used

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  • Porous ring-shaped prosthesis for cancellous bone reconstruction
  • Porous ring-shaped prosthesis for cancellous bone reconstruction
  • Porous ring-shaped prosthesis for cancellous bone reconstruction

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Embodiment Construction

[0016]The present invention will be described in detail below with reference to the drawings and embodiments. However, it should be understood that the drawings are only provided for a better understanding of the present invention, and they should not be construed as limiting the present invention.

[0017]It should be noted that all directional indicators (such as near end, far end, front end, rear end, upper end, lower end, etc.) in this embodiment are only used to explain the relative positional relationship, movement, etc. of the various components in the general operating posture, namely The side close to the operator is called the near end or the back end, and the side far away from the operator is called the far end or front end; if the operating posture changes, the directional indication will also change accordingly.

[0018]Such asfigure 1 ,figure 2 As shown, the cancellous bone reconstruction porous ring-shaped prosthesis provided in this embodiment includes a hollow main body ...

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Abstract

The invention discloses a porous ring-shaped prosthesis for cancellous bone reconstruction. The porous ring-shaped prosthesis is characterized by comprising a hollow main body part, wherein the main body part comprises a hollow tubular inner surface, an outer surface matched with the shape in a femoral medullary cavity, an upper end face located at the top and a lower end face located at the bottom, and porous structures are formed on the inner surface, the outer surface, the upper end face and the lower end face of the main body part. The porous structure on the outer surface of the main bodypart can enable the reconstruction prosthesis to obtain bone ingrowth, the long-term overall strength of the femur and the main body part is improved, the risk of fracture around the long-term prosthesis is reduced, and the long-term fixing curative effect of the reconstruction prosthesis is improved. The porous structure on the inner surface of the main body part can enable bone cement to form enough micro-twist lock between the inner surface of the main body part and the bone cement femoral prosthesis, so that the fixing effect of the cement prosthesis is improved, the problem of high failure rate of the cement prosthesis in an existing reconstruction method is solved, and the curative effect of a patient suffering from serious bone defect revision is improved.

Description

Technical field[0001]The invention relates to a porous metal ring-shaped prosthesis for cancellous bone reconstruction, which belongs to the field of medical devices.Background technique[0002]Artificial hip replacement is an effective method to treat various end-stage hip arthritis. Artificial hip revision surgery is a method to treat various artificial hip replacement failures. Severe osteolysis caused by loosening or abrasion, stress shielding, infection around the prosthesis, history of multiple operations, osteoporosis, iatrogenic bone defect caused by perforation or opening of the window during the removal of the original prosthesis or residual bone cement, makes In artificial hip joint revision surgery, the femoral side often faces different degrees of bone defects. The difficulty of reconstruction is that there are often severe bone defects on the femoral side. At the same time, the femur is often combined with proximal anatomical remodeling during revision surgery, such as v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/28A61F2/32A61F2/46
CPCA61F2/2846A61F2/36A61F2/4601A61F2002/2825
Inventor 周一新杨德金邵宏翊唐浩黄勇
Owner BEIJING JISHUITAN HOSPITAL