CN210541944U - High-flexibility bionic half-knuckle replacement part - Google Patents
High-flexibility bionic half-knuckle replacement part Download PDFInfo
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- CN210541944U CN210541944U CN201920638477.0U CN201920638477U CN210541944U CN 210541944 U CN210541944 U CN 210541944U CN 201920638477 U CN201920638477 U CN 201920638477U CN 210541944 U CN210541944 U CN 210541944U
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- knuckle
- intramedullary
- replacement part
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- flexibility
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Abstract
The utility model discloses a bionical half knuckle replacement of high flexibility ratio, including joint body (1) and intramedullary connector (2), its characterized in that joint body (1) for the bionical knuckle part according to human biomechanics design, the bottom of joint body (1) set up intramedullary connector (2), intramedullary connector (2) for components of a whole that can function independently combination formula vertebra shape structure, joint body (1) top surface is articular surface structure (8). The utility model discloses based on human biomechanics principle, the bionical metacarpophalangeal joint replacement part's of development conformality is better, and joint body bottom combines more firmly with the intramedullary part, and the articular surface part more accords with human physiology and dissects. The utility model discloses more accord with human biomechanics structure, mechanical cooperation nature is good, low cost, and clinical applicability is good, and patient's postoperative function recovers well, no matter be initial stability or long-term stable all obviously improve, safe in service life is the extension greatly.
Description
Technical Field
The utility model belongs to the technical field of orthopedics apparatus, concretely relates to high flexibility ratio bionical half knuckle replacement spare rational in infrastructure, that assembles portably.
Background
People are difficult to avoid the fracture of palmar bones and phalanges caused by accidents in the daily production and life process, or the limited movement of the palmar joints and the phalanges caused by diseases such as rheumatoid diseases and the like, even the normal physiological function is lost. The best treatment for improving metacarpophalangeal joint function is joint replacement with an artificial prosthesis, but replacement with existing prostheses not only has poor initial stability, but also has poor long-term stability due to poor bone ingrowth. After long-term follow-up after the existing prosthesis replacement, the defects are more obvious, so that a mature metacarpophalangeal joint prosthesis is not designed yet. The reasons for this are poor conformity of the articular surfaces of the prosthesis, unreasonable connection structure of the joint surfaces, and poor stability of the intra-medullary part, which leads to the above-mentioned undesirable effects. The utility model discloses the people is not enough to prior art, and the development more accords with human biomechanics structure, and mechanical cooperation nature is good, low cost, and the bionic knuckle replacement part of good and resistant rigid coupling of conformality replaces prior art's false body, is the effective mode of overcoming the prior art defect.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a more accord with human biomechanics structure, machinery cooperation nature is good, the bionical metacarpophalangeal joint replacement of low cost's high flexibility ratio.
The utility model aims at realizing like this, the bionical half knuckle replacement piece of high flexibility ratio include joint body and intramedullary connecting body, the joint body for the bionical knuckle part that designs according to human biomechanics, the bottom of joint body set up intramedullary connecting body, intramedullary connecting body for components of a whole that can function independently combination formula vertebra shape structure, joint body top surface is the articular surface structure.
The utility model discloses based on human biomechanics principle, the bionical metacarpophalangeal joint replacement part's of development conformality is better, and the faying face combines more firmly with the osteotomy face. The utility model discloses more accord with human biomechanics structure, mechanical cooperation nature is good, low cost, and clinical applicability is good, and patient's postoperative function resumes well, and safe use phase is very the extension greatly.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a left side view of FIG. 1;
reference numbers in the figures: 1~ joint body, 2~ intramedullary connector, 3~ expansion body, 4~ expansion push rods, 5~ expansion guide slot, 6~ boost boards, 7~ joint body central screw, 8~ articular surface structure, 11~ fixed barb, 12~ thrust screw.
Detailed Description
The following description of the present invention is provided with reference to the accompanying drawings, which are not intended to limit the present invention in any way, and any alterations or permutations made based on the teachings of the present invention are all within the scope of the present invention.
As shown in the attached drawings 1-2, the high-flexibility bionic half-knuckle replacement part comprises a knuckle body 1 and an intramedullary connecting body 2, the knuckle body 1 is a bionic knuckle part designed according to human body biomechanics, the bottom end of the knuckle body 1 is provided with the intramedullary connecting body 2, the intramedullary connecting body 2 is of a split combined type vertebral structure, and the top surface of the knuckle body 1 is of a joint surface structure 8.
The joint surface structure 8 on the top surface of the joint body 1 is arc-shaped, is a front arc-shaped arch surface and a rear arc-shaped arch surface, and is straight from left to right.
The joint surface structure 8 on the top surface of the joint body 1 is a single-curved-surface ridge.
The joint surface structure 8 on the top surface of the joint body 1 is in the shape of a single-curved-surface ridge, and the radius of curvature of the arc is 4-12 mm.
The joint surface structure 8 is in the shape of a single-curve cambered bulge, and the radius of curvature of a circular arc is 5-7 mm.
The joint body 1 is axially provided with a screw hole, wherein a boosting plate 6 matched with the screw hole is arranged; the center of the boosting plate 6 is provided with a clamping groove and is provided with an expansion push rod 4 in a matching way, and the lower section of the expansion push rod 4 is in threaded fit with the expansion body 3.
The split combined cone-shaped structure of the intramedullary connecting body 2 is a symmetrical inner guide groove structure, and the expansion guide groove 5 is in sliding fit with the expansion body 3.
The inner guide groove structure of the intramedullary connecting body 2 is integrally in a conical structure with a wide proximal end and a narrow distal end, and is matched with the trapezoid-structure expanding body 3 in a working way.
The joint body 1 is axially provided with a screw hole and matched with the boosting plate 6; the center of the boosting plate 6 is provided with a screw hole matched with the expansion push rod 4, and the lower section of the expansion push rod 4 is in clamping fit with the expansion body 3.
The expansion body 3 is in a trapezoid shape with a wide near end and a narrow far end, and the taper angle of the expansion body is 3-20 degrees.
The outer side of the cone end section of the intramedullary connecting body 2 is provided with a fixing barb 11.
The surface of the joint body 1 is provided with a pure titanium coating and is subjected to polishing treatment; the intramedullary connecting body 2 is made of nickel titanium memory alloy.
The utility model discloses theory of operation and working process:
the utility model discloses based on human biomechanics principle for whole and the fitting surface of bionical metacarpophalangeal joint replacement part more accord with bone structure characteristic, guarantee simultaneously that the replacement part combines more firmly with the osteotomy end, and initial stability is better, and the bone growth of being more convenient for keeps the long-term stability of part rigid coupling and firm, reduces patient's misery.
When the replacement part of the utility model is used for patients with finger joint fracture defects or rheumatism, the proper model is firstly selected and matched, especially for matching the palm finger joint. The wound surface is repaired, repeatedly corrected and adapted, firstly the expansion push rod in the intramedullary connecting body is adjusted to enable the expansion block to retreat, the front cone of the intramedullary connecting body contracts so as to be placed in the medullary cavity and be fully attached to the medullary cavity, then the expansion push rod in the medullary is adjusted again to push the expansion block inwards, so that the cone expands towards two sides to further firmly attach to the inner surface of the medullary cavity, and the far-end fixed thorn replacement part is tightly attached to the inner wall of the medullary cavity to prevent the expansion block from being pulled out. The replacement part is applied to metacarpal side replacement of metacarpophalangeal joint prosthesis.
If the replacement part needs to be replaced after operation, the expansion push rod 4 is only required to be adjusted to withdraw the expansion block 3, the cone contracts, and the replacement part can be taken out from the medullary cavity and replaced by a new replacement part. When the other embodiment is used, the expansion push rod 4 is in clamping fit with the expansion block 3, and the expansion block can be pulled out only by rotating the expansion push rod 4 anticlockwise. If the expanding push rod 4 and the expanding block 3 are in abutting fit, the expanding push rod 4 can be loosened and retreated to enable the expanding block to retreat.
The utility model discloses a metacarpophalangeal joint replacement part single-part structure both can regard as near-end palm side partial replacement, also can regard as distal end phalanx partial replacement, when using simultaneously, adds the joint pad of polyethylene material between the two to through spacing stake joint cooperation. If the single-body type displacement piece is used as a near-end or far-end displacement piece, the joint pad is not needed, and the limiting pile is directly removed in use.
Claims (10)
1. A high-flexibility bionic half-knuckle replacement part comprises a knuckle body (1) and an intramedullary connecting body (2), and is characterized in that the knuckle body (1) is a bionic knuckle part designed according to human body biomechanics, the bottom end of the knuckle body (1) is provided with the intramedullary connecting body (2), the intramedullary connecting body (2) is of a split combined type vertebral structure, and the top surface of the knuckle body (1) is of a joint surface structure (8).
2. The high-flexibility bionic semiphalangeal joint replacement part according to claim 1, characterized in that the articular surface structure (8) of the top surface of the articular body (1) is arc-shaped, is in the form of front and rear arc-shaped arch surfaces, and is straight from side to side.
3. The high-flexibility bionic semi-knuckle replacement part according to claim 1 or 2, characterized in that the knuckle structure (8) on the top surface of the knuckle body (1) is in the shape of a single-curved-surface hump.
4. The high-flexibility bionic semi-knuckle replacement part according to claim 1 or 2, characterized in that the knuckle structure (8) on the top surface of the knuckle body (1) is in the shape of a single-curved hump with a circular arc curvature radius of 4-12 mm.
5. The high-flexibility bionic half knuckle replacement part according to claim 1 or 2, characterized in that a screw hole is axially arranged on the knuckle body (1), wherein a boosting plate (6) matched with the screw hole is arranged; the center of the boosting plate (6) is provided with a clamping groove and is provided with an expansion push rod (4) in a matching way, and the lower section of the expansion push rod (4) is in threaded fit with the expansion body (3).
6. The high-flexibility bionic semiphalangeal joint replacement part according to claim 1, characterized in that the split-combined tapered structure of the intramedullary connecting body (2) is a symmetrical inner guide groove structure, and the expansion guide groove (5) is slidably engaged with the expansion body (3).
7. The high-flexibility bionic semiknuckle displacer according to claim 1 or 6, characterized in that the inner guide groove structure of the intramedullary connecting body (2) is integrally in a tapered structure with a wide proximal end and a narrow distal end, and is operatively matched with the trapezoid-structure expander (3).
8. The high-flexibility bionic semiknuckle displacer according to claim 6, characterized in that the expander (3) is in a trapezoid shape with a wide proximal end and a narrow distal end, and the taper angle is 3-20 °.
9. The high-flexibility bionic semiphalangeal joint replacement part according to claim 1 or 6, characterized in that the outer side of the cone end of the intramedullary connecting body (2) is provided with a fixing barb (11).
10. The high-flexibility bionic semi-knuckle replacement part according to claim 1 or 2, characterized in that the surface of the knuckle body (1) is provided with a pure titanium coating and is subjected to polishing treatment; the intramedullary connecting body (2) is made of nickel titanium memory alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920638477.0U CN210541944U (en) | 2019-04-26 | 2019-04-26 | High-flexibility bionic half-knuckle replacement part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920638477.0U CN210541944U (en) | 2019-04-26 | 2019-04-26 | High-flexibility bionic half-knuckle replacement part |
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| Publication Number | Publication Date |
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| CN210541944U true CN210541944U (en) | 2020-05-19 |
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| CN201920638477.0U Active CN210541944U (en) | 2019-04-26 | 2019-04-26 | High-flexibility bionic half-knuckle replacement part |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110013363A (en) * | 2019-04-26 | 2019-07-16 | 中国人民解放军联勤保障部队第九二〇医院 | A kind of bionical half articulations digitorum manus Replacement Part of high flexibility ratio |
| CN110013362A (en) * | 2019-04-26 | 2019-07-16 | 中国人民解放军联勤保障部队第九二〇医院 | A kind of high flexibility ratio is bionical all referring to joint replacement part |
-
2019
- 2019-04-26 CN CN201920638477.0U patent/CN210541944U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110013363A (en) * | 2019-04-26 | 2019-07-16 | 中国人民解放军联勤保障部队第九二〇医院 | A kind of bionical half articulations digitorum manus Replacement Part of high flexibility ratio |
| CN110013362A (en) * | 2019-04-26 | 2019-07-16 | 中国人民解放军联勤保障部队第九二〇医院 | A kind of high flexibility ratio is bionical all referring to joint replacement part |
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