CN104921796A - Tumor type knee joint prosthesis intramedullary needle - Google Patents
Tumor type knee joint prosthesis intramedullary needle Download PDFInfo
- Publication number
- CN104921796A CN104921796A CN201510397557.8A CN201510397557A CN104921796A CN 104921796 A CN104921796 A CN 104921796A CN 201510397557 A CN201510397557 A CN 201510397557A CN 104921796 A CN104921796 A CN 104921796A
- Authority
- CN
- China
- Prior art keywords
- pin
- self adaptation
- thighbone
- bone marrow
- intramedullary needle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/72—Intramedullary pins, nails or other devices
- A61B17/7233—Intramedullary pins, nails or other devices with special means of locking the nail to the bone
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/72—Intramedullary pins, nails or other devices
- A61B17/7283—Intramedullary pins, nails or other devices with special cross-section of the nail
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B2017/564—Methods for bone or joint treatment
Abstract
The invention discloses a tumor type knee joint prosthesis intramedullary needle which comprises a thighbone intramedullary pin lower segment, a thighbone intramedullary pin upper segment and a self-adaptive part. The thighbone intramedullary pin lower segment and the thighbone intramedullary pin upper segment are inserted into the thighbone marrow cavity during an operation. The self-adaptive part enables the thighbone intramedullary pin lower segment and the thighbone intramedullary pin upper segment to be connected and enables the intramedullary needle to have a certain rotating freedom degree. The self-adaptive part comprises a self-adaptive bearing column at the end of the thighbone intramedullary pin upper segment, an inner pin hole in the self-adaptive bearing column, an outer pin hole in the side wall of the end of the thighbone intramedullary pin lower segment and a self-adaptive bearing cone hole in the end of the thighbone intramedullary pin lower segment, and the self-adaptive bearing column can be inserted into the self-adaptive bearing cone hole. A pin capable of being inserted into the outer pin hole and the inner pin hole is further included. The intramedullary needle can adapt to the physiological curvature that the thighbone is upward outside, inclined and downward inside, and the technical problem that the thighbone and the prosthesis lateral force line are not matched due to the fact that an existing artificial knee joint prosthesis intramedullary needle is inconsistent with the thighbone anatomic form can be solved better.
Description
Technical field
The invention belongs to biomechanics field, be specifically related to a kind of tumorous type knee-joint prosthesis intramedullary needle.
Background technology
Along with malignant bone tumor survival rate and protect the significantly improving of limb success rate, patient it is also proposed requirements at the higher level to the postoperative function of long segment prosthetic replacement and long-time stability.Tumorous type knee prosthesis replacement art can complete reconstruction at short notice, but clinical studies show previously, the life span of prosthese has very big-difference.Although tumorous type knee prosthesis replacement art can accomplish reconstruction, anatomy is rebuild and is difficult to.Because the volume of tumorous type artificial knee joint prosthesis is large, the line of force is long, and bone will affect its life span with mating of the prosthese line of force in theory.In anatomy aspect, the prosthese line of force is difficult to the sagittal plain line of force complying with long bone physiological camber, particularly femur.At present about Femoral quality type prosthese Coronal and rotate the opposed postoperative function that changes of the line of force and to recover and the impact in prosthese service life has large quantity research.Doctor to femur on Coronal and prosthese line of force para-position accuracy requirement high, and in sagittal plain, the para-position accuracy of femur and the prosthese line of force is often left in the basket, and causing sagittal plain malalignment to become affects the main mechanical factor of prosthese aseptic loosening.Traditional tumorous type knee-joint prosthesis design is too simple, has only rebuild the length of limbs and the width in joint, can not ensure the matched well of the prosthese line of force and the dissection line of force in art, and then affect postoperative prosthese effect.
Summary of the invention
In order to overcome above-mentioned prior art Problems existing, the object of the present invention is to provide a kind of tumorous type knee-joint prosthesis intramedullary needle, tumorous type knee prosthesis replacement art can be applicable to and rebuild deformed limb function, better can solve position, side femur physiological camber and the unmatched difficult problem of the prosthese line of force simultaneously, this tumorous type prosthese intramedullary needle better can solve the problem that prosthese and the bad prosthetic loosening caused of femur side virial Line To Line sink, and virial Line To Line problem that is bad, that do not meet position, femur side physiological camber in femur side is better solved.
For achieving the above object, the technical solution used in the present invention is:
A kind of tumorous type knee-joint prosthesis intramedullary needle, comprises in operation the femur bone marrow pin hypomere 1 and femur bone marrow pin epimere 7 that insert femur bone marrow intracavity and femur bone marrow pin hypomere 1 and femur bone marrow pin epimere 7 is coupled together and make intramedullary needle have the self adaptation part of certain rotational freedom; Described self adaptation part comprises the self adaptation support column 5 being arranged on femur bone marrow pin epimere 7 end, the inner pinhole 6 that self adaptation support column 5 is offered; The outer pin-and-hole 2 that the end sidewalls of femur bone marrow pin hypomere 1 is offered, at the self adaptation supporting taper hole 4 that the self adaptation support column 5 of the end opens of femur bone marrow pin hypomere 1 can insert; Also comprise the pin 3 that can insert outer pin-and-hole 2 and inner pinhole 6.
Described intramedullary needle diameter is 8-13mm, self adaptation portion size is little, only lay single pin, simultaneously in order to ensure the tensile strength of pin 3 and the weakening reduced self adaptation support column 5, self adaptation supporting taper hole 4 hole wall Anti-pull-press intensity, the cross section of pin 3 is oval.
Described outer pin-and-hole 2 is interference fit with coordinating of pin 3, to prevent the slip of implanting and selling in use procedure along pin 3 axis direction.
The cross sectional dimensions of described inner pinhole 6 is greater than the cross sectional dimensions of pin 3 to ensure that the existence of pin 3 can not hinder prosthese adaptive process.
Described self adaptation supporting taper hole 4 with tapering and hole wall with angle of inclination, be set to all directions 5 °, allow for self adaptation support column 5 and upper part thereof in Using prosthesis process and relatively can have certain bias degree of freedom, better to adapt to different femur bone marrow cavity shapes in self adaptation supporting taper hole 4 and its underpart; After implanting, the rest of self adaptation supporting taper hole 4 need by Cement fixation to limit its relative motion.
The bottom of the top of described self adaptation support column 5 and self adaptation supporting taper hole 4 all have employed spherical surface, makes the two for sphere-contact.
Compared to the prior art comparatively, the present invention possesses following advantage:
1, between femoral component intramedullary needle upper-lower section, insert movable part, the relative angle between upper-lower section can be changed within the specific limits thus adapt to different marrow cavity of femur radian; Compensate for existing prosthese intramedullary needle radian immutable so that the problem of personalized difference of medullary cavity radian cannot be adapted to.
2, have employed spherical surface in the bottom of the top of self adaptation support column 5 and self adaptation supporting taper hole 4, make still can ensure maximum contact area under different self adaptation angle, the probability lost efficacy in the compressive stress of contact surface during reduction pressurized and this position of the shear stress of pin 3 and then reduction.
3, the shape of cross section of pin 3 adopts oval but not common circle, reduces pin-and-hole and support weakening of taper hole 4 mechanical strength to upper end self adaptation support column 5 and lower end self adaptation while increasing the anti-shear ability of pin 3.
Accompanying drawing explanation
Fig. 1 is intramedullary needle structural representation of the present invention.
Fig. 2 is prosthese self-adaptive component partial side position sectional view, and wherein Fig. 2 b is the enlarged drawing at the details A place of Fig. 2 a.
Fig. 3 is prosthese self-adaptive component local normotopia sectional view, and wherein Fig. 3 b is the enlarged drawing at the details B place of Fig. 3 a.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Other parts of the prosthese be connected with the design's parts, not as the design's content, therefore do not add describe.
As shown in Figure 1, Figure 2 and Figure 3, a kind of tumorous type knee-joint prosthesis of the present invention intramedullary needle, comprises in operation the femur bone marrow pin hypomere 1 and femur bone marrow pin epimere 7 that insert femur bone marrow intracavity and femur bone marrow pin hypomere 1 and femur bone marrow pin epimere 7 is coupled together and make intramedullary needle have the self adaptation part of certain rotational freedom; Described self adaptation part comprises the self adaptation support column 5 being arranged on femur bone marrow pin epimere 7 end, the inner pinhole 6 that self adaptation support column 5 is offered; The outer pin-and-hole 2 that the end sidewalls of femur bone marrow pin hypomere 1 is offered, at the self adaptation supporting taper hole 4 that the self adaptation support column 5 of the end opens of femur bone marrow pin hypomere 1 can insert; Also comprise the pin 3 that can insert outer pin-and-hole 2 and inner pinhole 6.
As the preferred embodiment of the present invention, described intramedullary needle diameter is only 8-13mm, self adaptation portion size is little, only lay single pin, simultaneously in order to ensure the tensile strength of pin 3 and the weakening reduced self adaptation support column 5, self adaptation supporting taper hole 4 hole wall Anti-pull-press intensity, the cross section of pin 3 is oval.
As the preferred embodiment of the present invention, described outer pin-and-hole 2 is interference fit with coordinating of pin 3, and namely the diameter of outer pin-and-hole 2 is slightly less than the diameter of pin 3, to prevent the slip of implanting and selling in use procedure along pin 3 axis direction.
As the preferred embodiment of the present invention, the cross sectional dimensions of described inner pinhole 6 is greater than the cross sectional dimensions of pin 3 to ensure that the existence of pin 3 can not hinder prosthese adaptive process.
Described self adaptation supporting taper hole 4 with tapering and hole wall with angle of inclination, be set to all directions 5 °, allow for self adaptation support column 5 and upper part thereof in Using prosthesis process can have certain bias degree of freedom to be set to all directions 5 °, better to adapt to different femur bone marrow cavity shapes in self adaptation supporting taper hole 4 and its underpart relatively; After implanting, the rest of self adaptation supporting taper hole 4 need by Cement fixation to limit its relative motion.
First the present invention obtains femur crooked radian by PACS systematic survey X-ray film, according to patient femur's physiological bending degree, in operation process, intramedullary needle part regulates all directions angle by free axis, to reach the requirement adapting to human femur under loading physiological curve to greatest extent.Because the diameter of pin is large compared with outer pin-and-hole, ensure that the stability that free axis place intramedullary needle is fixing, after implanting intramedullary needle, the rest of self adaptation supporting taper hole, by Cement fixation, fixes intramedullary needle with this.The invention provides one and better can solve position, side femur physiological camber and the unmatched intramedullary needle of the prosthese line of force, and the prosthese intramedullary needle that tumorous type knee prosthesis replacement art rebuilds deformed limb function can be applicable to.This tumorous type prosthese intramedullary needle better can solve the problem that prosthese and the bad prosthetic loosening caused of femur side virial Line To Line sink.
Claims (6)
1. a tumorous type knee-joint prosthesis intramedullary needle, is characterized in that: comprise in operation the femur bone marrow pin hypomere (1) and femur bone marrow pin epimere (7) that insert femur bone marrow intracavity and femur bone marrow pin hypomere (1) and femur bone marrow pin epimere (7) coupled together and make intramedullary needle have the self adaptation part of certain rotational freedom; Described self adaptation part comprises the self adaptation support column (5) being arranged on femur bone marrow pin epimere (7) end, the inner pinhole (6) that self adaptation support column (5) is offered; The outer pin-and-hole (2) that the end sidewalls of femur bone marrow pin hypomere (1) is offered, in self adaptation supporting taper hole (4) that the self adaptation support column (5) of the end opens of femur bone marrow pin hypomere (1) can insert; Also comprise the pin (3) that can insert outer pin-and-hole (2) and inner pinhole (6).
2. tumorous type knee-joint prosthesis intramedullary needle according to claim 1, it is characterized in that: described intramedullary needle diameter is 8-13mm, self adaptation portion size is little, only lay single pin, simultaneously in order to ensure the shear strength of pin (3) and the weakening reduced self adaptation support column (5), self adaptation supporting taper hole (4) hole wall Anti-pull-press intensity, the cross section of pin (3) is oval.
3. tumorous type knee-joint prosthesis intramedullary needle according to claim 1, it is characterized in that: described outer pin-and-hole (2) is interference fit with coordinating of pin (3), to prevent the slip of implanting and selling in use procedure along pin (3) axis direction.
4. tumorous type knee-joint prosthesis intramedullary needle according to claim 1, is characterized in that: the cross sectional dimensions of described inner pinhole (6) is greater than the cross sectional dimensions of pin (3) to ensure that the existence of selling (3) can not hinder prosthese adaptive process.
5. tumorous type knee-joint prosthesis intramedullary needle according to claim 1, it is characterized in that: described self adaptation supporting taper hole (4) with tapering and hole wall with angle of inclination, be set to all directions 5 °, allow self adaptation support column (5) and upper part thereof in Using prosthesis process relatively can have certain bias degree of freedom, better to adapt to different femur bone marrow cavity shapes in self adaptation supporting taper hole (4) and its underpart; After implanting, the rest of self adaptation supporting taper hole (4) need by Cement fixation to limit its relative motion.
6. tumorous type knee-joint prosthesis intramedullary needle according to claim 1, is characterized in that: the bottom of the top of described self adaptation support column (5) and self adaptation supporting taper hole (4) all have employed spherical surface, makes the two for sphere-contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510397557.8A CN104921796B (en) | 2015-07-08 | 2015-07-08 | A kind of tumorous type knee-joint prosthesis intramedullary needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510397557.8A CN104921796B (en) | 2015-07-08 | 2015-07-08 | A kind of tumorous type knee-joint prosthesis intramedullary needle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104921796A true CN104921796A (en) | 2015-09-23 |
| CN104921796B CN104921796B (en) | 2017-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510397557.8A Active CN104921796B (en) | 2015-07-08 | 2015-07-08 | A kind of tumorous type knee-joint prosthesis intramedullary needle |
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| Country | Link |
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| CN (1) | CN104921796B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105943093A (en) * | 2016-07-08 | 2016-09-21 | 江苏风和医疗器材有限公司 | Medical extraction device |
| CN108969154A (en) * | 2018-08-31 | 2018-12-11 | 上海市第六人民医院 | A kind of production method of the arc femur broach and its prosthese model of tumorous type knee-joint prosthesis |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030014120A1 (en) * | 2001-07-16 | 2003-01-16 | Carson Christopher Patrick | Orthopedic implant extension |
| US20060167555A1 (en) * | 2004-12-17 | 2006-07-27 | Heck Robert K | Modular diaphyseal and collar implant |
| US7485149B1 (en) * | 2003-10-06 | 2009-02-03 | Biomet Manufacturing Corporation | Method and apparatus for use of a non-invasive expandable implant |
| CN103002834A (en) * | 2010-06-11 | 2013-03-27 | 沃尔德马连接两合公司 | Prosthesis for partial replacement of a tubular bone |
| CN203829097U (en) * | 2014-05-26 | 2014-09-17 | 北京威高亚华人工关节开发有限公司 | Rotary hinge type knee joint prosthesis |
-
2015
- 2015-07-08 CN CN201510397557.8A patent/CN104921796B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030014120A1 (en) * | 2001-07-16 | 2003-01-16 | Carson Christopher Patrick | Orthopedic implant extension |
| US7485149B1 (en) * | 2003-10-06 | 2009-02-03 | Biomet Manufacturing Corporation | Method and apparatus for use of a non-invasive expandable implant |
| US20060167555A1 (en) * | 2004-12-17 | 2006-07-27 | Heck Robert K | Modular diaphyseal and collar implant |
| CN103002834A (en) * | 2010-06-11 | 2013-03-27 | 沃尔德马连接两合公司 | Prosthesis for partial replacement of a tubular bone |
| CN203829097U (en) * | 2014-05-26 | 2014-09-17 | 北京威高亚华人工关节开发有限公司 | Rotary hinge type knee joint prosthesis |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105943093A (en) * | 2016-07-08 | 2016-09-21 | 江苏风和医疗器材有限公司 | Medical extraction device |
| CN108969154A (en) * | 2018-08-31 | 2018-12-11 | 上海市第六人民医院 | A kind of production method of the arc femur broach and its prosthese model of tumorous type knee-joint prosthesis |
| CN108969154B (en) * | 2018-08-31 | 2023-09-12 | 上海市第六人民医院 | Arc femoral bone marrow needle of tumor type knee joint prosthesis and manufacturing method of prosthesis model of arc femoral bone marrow needle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104921796B (en) | 2017-06-20 |
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Effective date of registration: 20201209 Address after: Building 1, No.5, Gaopeng Avenue, Chengdu, Sichuan 610000 Patentee after: CHENGDU RENJI TIANCHENG BIOTECHNOLOGY Co.,Ltd. Address before: 710049 No. 28, Xianning Road, Xi'an, Shaanxi Patentee before: XI'AN JIAOTONG University |
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Effective date of registration: 20211220 Address after: Room 203, floor 2, building 2, No. 33, Wuqing South Road, Wuhou District, Chengdu, Sichuan 610000 Patentee after: Chengdu gedengte Technology Co.,Ltd. Address before: Building 1, No.5, Gaopeng Avenue, Chengdu, Sichuan 610000 Patentee before: CHENGDU RENJI TIANCHENG BIOTECHNOLOGY Co.,Ltd. |