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hip prosthetic device

A technology of hip joint prosthesis and spring device, applied in the direction of hip joints, prostheses, joint implants, etc., can solve the problems of not being useful, poor inherent life, etc.

Active Publication Date: 2019-04-09
SINGAPORE HEALTH SERVICES PTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This setup does not appear to be useful for avoiding micromobility or preventing loosening of the femoral stem along the axial femoral axis
Additionally, the serrated step feature has poor intrinsic life

Method used

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Examples

Experimental program
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Effect test

example 1

[0078] Example 1 is a hip joint prosthetic device, including a femoral rod configured to be implanted in the femur, the femoral rod including:

[0079] An elongated rod sleeve having a blind hole formed therein and extending in its longitudinal direction, and also having a hole opening at the upper front end of the rod sleeve;

[0080] Rod core, which has

[0081] An elongated shaft, which is inserted into the blind hole and arranged in it so as to be slidable in its longitudinal direction, and the neck has

[0082] Lower neck, the lower end of the lower neck is fixedly attached to the upper end of the rod core, and has

[0083] The upper neck, the lower end of the upper neck is fixedly attached to the upper end of the lower neck, and the upper neck has the upper end to which the femoral head is attached;

[0084] The shock absorber mechanism is disposed in the rod sleeve and operably disposed between the rod shaft and the rod sleeve so as to resist at least the downwardly directed longi...

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PUM

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Abstract

A hip prosthesis device including a femoral stem, the femoral stem including an elongate stem sleeve having a blind hole extending in a longitudinal direction and a hole opening at an upper frontal end of the stem sleeve; a stem core having an elongate stem shaft inserted in the blind hole and slidable in the longitudinal direction, a neck having a lower neck portion and an upper neck portion, a lower end of a lower neck portion attached to an upper end of the stem shaft, the upper neck portion attachable to a femoral head; a shock absorber mechanism operatively provided between the stem shaft and the stem sleeve to act against a downwardly directed longitudinal sliding motion of the stem shaft relative to the stem sleeve; and a closure cap positioned to close the hole opening with a through hole which the neck extends with its lower neck portion.

Description

[0001] Cross references to related applications [0002] This application claims the priority of the US provisional patent application No. 62 / 054,405 filed on September 24, 2014, for all purposes, the entire content of which is incorporated herein by reference. Technical field [0003] Particular embodiments generally relate to hip joint prosthetic devices. Background technique [0004] Total hip replacement (THR) is currently the gold standard treatment for severe hip osteoarthritis and other end-stage hip diseases. In total hip replacement, the femoral head and acetabulum are replaced with artificial femoral rods and acetabular cups, respectively. At the proximal end of the femoral shaft is the neck that terminates in a spherical ball and is commonly referred to as the femoral head. The spherical geometry of the artificial femoral head enables it to be freely connected to the patient's acetabulum or a prosthetic acetabular cup installed in the patient's acetabulum. In order to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F2/32A61B17/74
CPCA61F2/30744A61F2/3662A61F2002/30156A61F2002/30365A61F2002/3037A61F2002/30566A61F2002/30589A61F2002/30593A61F2002/3694A61F2310/00389A61B17/74A61F2002/30558A61F2002/30568A61F2002/30601A61F2002/30733A61F2002/365A61F2002/3652A61F2002/3674
Inventor 蔡庆安游开顺卢毅能
Owner SINGAPORE HEALTH SERVICES PTE