Bone-prosthesis interface relative displacement device
By designing the relative displacement device of the bone-prosthesis interface, using the combination of thread screwing device and flexible hinge, the problem of joint prosthesis is solved, the micro-environmental impact measurement on the bone integration process is realized, and the prosthesis and bone quality are improved. The ability to combine prosthesis prosthesis prosthesis prosthesis prosthesis.
Patent Information
- Application Number
- CN202110556446.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-05-21
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2041-05-21
AI Technical Summary
The main reason for the lack of mechanical microenvironment to differentiate, damage, repair and integration of the tissues between the prosthesis and the bone interface is the lack of mechanical microenvironment. Influence, the existing technology has failed to effectively solve this problem.
Design a bone-prosthetic interface relative displacement device, including threaded screwing device, flexible hinge, micro-moving rod shank and stainless steel fixing device, flexible hinge is made by 3D titanium alloy printing, and through external threads and bone buoys Structural implant connections enable fixation and microdisplacement measurements within the bone marrow cavity.
The device can maintain the fixation of the prosthesis in the bone marrow cavity, measure micro-dynamic changes, help study the osteointegration process, improve the binding ability of the prosthesis to bone, and prolong the survival of the prosthesis.
Smart Images
Figure CN115040292B_ABST
Abstract
Description
Technical Field
[0001] The invention is a device for testing the effect of micro-movement between implant and bone on bone integration during bone integration, and relates to the field of medical device joint prosthesis. Background Art
[0002] Joint replacement is a surgical procedure that replaces diseased and deteriorated joints with artificial prostheses, thereby restoring the normal movement function of the human joints. It is currently the only way to solve human joint necrosis after clinical drug treatment fails. The implant will become loose after a certain period of time and needs to be revised.
[0003] Loosening of joint replacement prostheses has long been a difficult problem that needs to be solved in clinical practice. Despite rapid advances in medicine, biology, and materials science, loosening treatment is still not ideal. The main reason for the failure, poor growth, and long-term growth of the prosthesis-bone interface is the lack of research on the effects of the mechanical microenvironment on tissue differentiation, damage, repair, and integration at the prosthesis-bone interface.
[0004] 3D printing technology is a technology that constructs objects by printing layer by layer based on physical models and digital models. Through 3D printing technology, prostheses of any shape can be obtained, and prostheses that cannot be made by traditional processing methods can be manufactured. By adjusting the porosity, void size and shape, prostheses with strength and elasticity models close to normal bone can be obtained, which can reduce the stress shielding effect to a certain extent and improve the long-term survival rate of the prosthesis. 3D printed porous titanium alloy prostheses have a certain bone ingrowth ability and can be closely integrated with bone. Summary of the invention
[0005] The purpose of the present invention is to provide a device for testing the influence of micro-movement on bone integration when a prosthesis is implanted into a bone for bone integration.
[0006] To achieve the above purpose, the technical solution adopted by the present invention is: a bone-prosthesis interface relative displacement device. It includes: a screw-in device with a thread, a flexible hinge, a micro-motion rod handle, a stainless steel fixing device, and an implant with a trabecular structure; the structural feature is that: the screw-in device with a thread is connected together by a flexible hinge, the upper part of the micro-motion rod handle is fixedly connected to the stainless steel fixing device, and the lower part of the micro-motion rod handle is connected to the implant with a trabecular structure.
[0007] In order to enable the screw-in device to be screwed into the medullary cavity and remain fixed, the screw-in device is provided with an external thread.
[0008] In order to enable the stainless steel fixing device to be screwed into the medullary cavity and remain fixed, an external thread is arranged at the lower end of the stainless steel fixing device.
[0009] The flexible hinge is manufactured by 3D printing of titanium alloy, and the flexible hinge is fixed to the screw-in device and the micro-motion rod handle by interference fit.
[0010] The distance between the axis center of the screw-in device and the axis center of the left end of the stainless steel fixing device with external threads is 50 mm. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a schematic diagram of the overall structure of the present invention;
[0012] Figure 2 yes Figure 1 The main view;
[0013] Figure 3 yes Figure 1 A cross-sectional view of DETAILED DESCRIPTION
[0014] The present invention is further described in detail below with reference to the accompanying drawings.
[0015] like Figure 1 In the embodiment shown, the bone-prosthesis interface relative displacement device of the present invention comprises a screw-in device 1 with a thread, a flexible hinge 2, a micro-motion rod handle 3, a stainless steel fixing device 4, and a prosthesis 5 with a trabecular structure.
[0016] like Figure 1 As shown, the stainless steel fixture 4 is first screwed into the medullary cavity of the sheep femur, so that the upper part of the stainless steel fixture 4 is parallel to the axial direction of the bone. The screw-in device 1 with a thread is screwed into the medullary cavity of the sheep femur, so that the trabecular structure prosthesis 5 contacts the medullary cavity lining of the sheep femur, and the stainless steel fixture 4 is fixed to the upper part of the micro-motion rod handle 3.
[0017] When the sheep walks, the thigh bone will be strained as soon as the foot touches the ground, and the bone between the stainless steel fixing device 4 and the screw-in device 1 with threads will be deformed, resulting in micro displacement of the prosthesis of the trabecular structure.
Claims
1. A device for studying the effect of micro-displacement between a prosthesis and a bone on bone integration, characterized in that The device for studying the effect of micro-displacement between a prosthesis and a bone on bone integration comprises a screw-in device with a thread (1), a flexible hinge (2), a micro-motion rod handle (3), a stainless steel fixing device (4) and a prosthesis with a trabecular structure (5); the screw-in device with a thread (1) has an external thread, the flexible hinge (2) is printed by 3D titanium alloy, and the lower end of the stainless steel fixing device (4) has an external thread; the screw-in device with a thread (1) is connected to the micro-motion rod handle (3) through the flexible hinge (2), the upper part of the micro-motion rod handle (3) is fixedly connected through the stainless steel fixing device (4), and the lower part of the micro-motion rod handle (3) is connected to the prosthesis with a trabecular structure (5); according to the principle of lever, the micro-displacement between the micro-motion rod handle and the stainless steel fixing device (4) is fixedly ... The upper part of the movable rod handle moves relatively, and the trabecular structure prosthesis also has a displacement micro-movement; first, the stainless steel fixing device (4) is screwed into the bone marrow cavity of the femur, so that the upper part of the stainless steel fixing device (4) is parallel to the axial direction of the bone, and the screw-in device (1) with a thread is screwed into the bone marrow cavity of the femur, so that the trabecular structure prosthesis contacts the bone marrow cavity lining of the femur, and the stainless steel fixing device (4) is fixed to the upper part of the micro-motion rod handle (3); as soon as the foot contacts the ground, the femur is strained under force, and the bone between the stainless steel fixing device (4) and the screw-in device with a thread (1) is deformed, resulting in a micro-displacement of the trabecular structure prosthesis (5).