CN104921796B - A kind of tumorous type knee-joint prosthesis intramedullary needle - Google Patents
A kind of tumorous type knee-joint prosthesis intramedullary needle Download PDFInfo
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- CN104921796B CN104921796B CN201510397557.8A CN201510397557A CN104921796B CN 104921796 B CN104921796 B CN 104921796B CN 201510397557 A CN201510397557 A CN 201510397557A CN 104921796 B CN104921796 B CN 104921796B
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- pin
- self adaptation
- femur
- bone marrow
- intramedullary needle
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- 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
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Neurology (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
Abstract
Femur bone marrow pin hypomere and femur bone marrow pin epimere in marrow cavity of femur and the self adaptation part that femur bone marrow pin hypomere and femur bone marrow pin epimere are coupled together and make intramedullary needle have certain rotational freedom are inserted the invention discloses a kind of tumorous type knee-joint prosthesis intramedullary needle, including in operation；The self adaptation part includes being arranged on the self adaptation support column of femur bone marrow pin epimere end, the inner pinhole opened up on self adaptation support column；The outer pin-and-hole opened up in the end sidewalls of femur bone marrow pin hypomere, the self adaptation supporting taper hole that the self adaptation support column opened up in the end of femur bone marrow pin hypomere is inserted into；Also include being inserted into the pin of outer pin-and-hole and inner pinhole；Intramedullary needle of the invention is suitable for femur in outside upper physiological camber lower in the diagonal, can preferably solve existing artificial knee joint prosthesis femoral intramedullary nail with the inconsistent femur for causing of femur anatomic form and the prosthese side unmatched technical problem of the line of force.
Description
Technical field
The invention belongs to biomethanics field, and in particular to a kind of tumorous type knee-joint prosthesis intramedullary needle.
Background technology
With the survival rate of malignant bone tumor and significantly improving for guarantor's limb success rate, patient is postoperative to long segment prosthetic replacement
Function and long-time stability it is also proposed requirements at the higher level.Tumorous type knee prosthesis replacement art can in a short time complete work(
Can rebuild, but the past clinical studies show, the life span of prosthese has very big difference.Though tumorous type knee prosthesis replacement art
Reconstruction can so be accomplished, but anatomy is rebuild and is difficult.Because the volume of tumorous type artificial knee joint prosthesis is big, the line of force is long, reason
By upper bone its life span will be influenceed with matching for the prosthese line of force.In anatomy aspect, the prosthese line of force is difficult to comply with long bone physiology
The sagittal plain line of force of curvature, particularly femur.On Femoral quality type prosthese Coronal and rotation, the line of force is opposed changes postoperative at present
The existing numerous studies of the influence of functional rehabilitation and prosthese service life.Doctor is accurate to femur on Coronal and the contraposition of the prosthese line of force
Property requires high, and femur is often ignored with the contraposition accuracy of the prosthese line of force in sagittal plain, cause sagittal plain malalignment into
To influence the main mechanical factor of prosthese aseptic loosening.Traditional tumorous type knee-joint prosthesis design is excessively simple, Jin Jinchong
The length of limbs and the width in joint are built, it is impossible to ensure the matched well of the prosthese line of force and the dissection line of force in art, and then have influenceed
Postoperative prosthese effect.
The content of the invention
It is false it is an object of the invention to provide a kind of tumorous type knee joint for the problem for overcoming above-mentioned prior art to exist
Body intramedullary needle, can be applied to tumorous type knee prosthesis replacement art and rebuild deformed limb function, while side position can preferably be solved
Femur physiological camber and the unmatched problem of the prosthese line of force, the tumorous type prosthese intramedullary needle can preferably solve prosthese and femur
The problem that prosthetic loosening sinks caused by the line of force malalignment of side position, makes femur side position line of force malalignment, does not meet femur side
The problem of position physiological camber is preferably solved.
To reach above-mentioned purpose, the technical solution adopted by the present invention is：
A kind of tumorous type knee-joint prosthesis intramedullary needle, including the femur bone marrow pin hypomere in marrow cavity of femur is inserted in operation
1 and femur bone marrow pin epimere 7 and femur bone marrow pin hypomere 1 and femur bone marrow pin epimere 7 are coupled together and have intramedullary needle
The self adaptation part of certain rotational freedom；The self adaptation part includes being arranged on the adaptive of the end of femur bone marrow pin epimere 7
Support column 5 is answered, the inner pinhole 6 opened up on self adaptation support column 5；Opened up in the end sidewalls of femur bone marrow pin hypomere 1
Outer pin-and-hole 2, the self adaptation supporting taper hole 4 that the self adaptation support column 5 opened up in the end of femur bone marrow pin hypomere 1 is inserted into；
Also include being inserted into the pin 3 of outer pin-and-hole 2 and inner pinhole 6.
The a diameter of 8-13mm of intramedullary needle, self adaptation portion size is small, only lays single pin, while in order to ensure pin
3 tensile strength and reduction support the weakening of the hole wall tension Compressive Strength of taper hole 4, the horizontal stroke of pin 3 to self adaptation support column 5, self adaptation
Section is ellipse.
The outer pin-and-hole 2 and pin 3 with interference fit is combined into, to prevent to be sold along the axis side of pin 3 during implantation and use
To slip.
The cross sectional dimensions of the inner pinhole 6 is more than presence of the cross sectional dimensions of pin 3 to ensure pin 3 will not hinder prosthese
Adaptive process.
Self adaptation supporting taper hole 4 carries angle of inclination with tapered i.e. hole wall, be set to 5 ° of all directions, it is allowed to
During Using prosthesis self adaptation support column 5 and thereon part can relative self adaptation supporting taper hole 4 and its underpart have necessarily
The bias free degree, preferably to adapt to different marrow cavity of femur shapes；Self adaptation supports the rest of taper hole 4 after implantation
Need to be by Cement fixation limiting its relative motion.
The bottom of the top of the self adaptation support column 5 and self adaptation supporting taper hole 4 employs spherical surface, makes the two
It is sphere-contact.
Compared to the prior art compared with the present invention possesses following advantage：
1st, movable part is inserted between femoral component intramedullary needle upper-lower section, makes the relative angle between upper-lower section can be
Change is so as to adapt to different marrow cavity of femur radians in certain limit；Compensate for existing prosthese intramedullary needle radian immutable so that nothing
Method adapts to the problem of the personalized difference of ossis radian.
2nd, spherical surface is employed in the bottom on the top of self adaptation support column 5 and self adaptation supporting taper hole 4, is made in difference
The contact area of maximum is still ensured that under self adaptation angle, the shearing for reducing the compression and pin 3 of contact surface when being pressurized is answered
Power and then the possibility of the position failure for reducing.
3rd, the shape of cross section of pin 3 uses oval rather than common circle, while increasing the anti-shear ability of pin 3
Reduce the decrease that pin-and-hole supports the mechanical strength of taper hole 4 to upper end self adaptation support column 5 and lower end self adaptation.
Brief description of the drawings
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 are the enlarged drawing at the details A of Fig. 2 a.
Fig. 3 is prosthese self-adaptive component part normotopia sectional view, and wherein Fig. 3 b are the enlarged drawing at the details B of Fig. 3 a.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
The other parts of the prosthese being connected with the design part, not as the design content, therefore are not added with narration.
As shown in Figure 1, Figure 2 and Figure 3, a kind of tumorous type knee-joint prosthesis intramedullary needle of the invention, including stock is inserted in operation
Femur bone marrow pin hypomere 1 and femur bone marrow pin epimere 7 in bone ossis and by femur bone marrow pin hypomere 1 and femur bone marrow pin
The self adaptation part that epimere 7 is coupled together and makes intramedullary needle have certain rotational freedom；The self adaptation part includes being arranged on
The self adaptation support column 5 of the end of femur bone marrow pin epimere 7, the inner pinhole 6 opened up on self adaptation support column 5；In femur bone marrow
The outer pin-and-hole 2 opened up in the end sidewalls of pin hypomere 1, in the energy of self adaptation support column 5 that the end of femur bone marrow pin hypomere 1 opens up
The self adaptation supporting taper hole 4 of enough insertions；Also include being inserted into the pin 3 of outer pin-and-hole 2 and inner pinhole 6.
Used as the preferred embodiment of the present invention, the intramedullary needle diameter is only 8-13mm, and self adaptation portion size is small, only
Single pin is laid, while in order to ensure the tensile strength of pin 3 and reduce to self adaptation support column 5, self adaptation supporting taper hole 4 hole
The weakening of wall tension Compressive Strength, the cross section of pin 3 is ellipse.
As the preferred embodiment of the present invention, the outer pin-and-hole 2 and pin 3 with being combined into interference fit, i.e., outer pin-and-hole 2
Diameter is slightly less than the diameter of pin 3, to prevent to sell slip along the axis direction of pin 3 during implantation and use.
As the preferred embodiment of the present invention, the cross sectional dimensions of the inner pinhole 6 more than pin 3 cross sectional dimensions with
Ensureing the presence of pin 3 will not hinder prosthese adaptive process.
Self adaptation supporting taper hole 4 carries angle of inclination with tapered i.e. hole wall, be set to 5 ° of all directions, it is allowed to
During Using prosthesis self adaptation support column 5 and thereon part can relative self adaptation supporting taper hole 4 and its underpart have necessarily
The bias free degree be set to 5 ° of all directions, preferably to adapt to different marrow cavity of femur shapes；Self adaptation supporting after implantation
The rest of taper hole 4 need to be by Cement fixation limiting its relative motion.
The present invention obtains femur crooked radian by PACS system measurement X-ray film first, according to patient femur's physiological bending degree,
Intramedullary needle part can adjust all directions angle by free axle in surgical procedure, and human femur under loading is adapted to greatest extent to reach
The requirement of physiological curve.Because the diameter of pin is big compared with outer pin-and-hole, ensure that the stability that intramedullary needle is fixed at free axle, marrow is implanted into
After interior pin, the rest of self adaptation supporting taper hole fixes intramedullary needle by Cement fixation with this.The invention provides one kind
Side position femur physiological camber and the unmatched intramedullary needle of the prosthese line of force can be preferably solved, and can be closed suitable for tumorous type knee
Section prosthesis replacement rebuilds the prosthese intramedullary needle of deformed limb function.The tumorous type prosthese intramedullary needle can preferably solve prosthese and stock
The problem that prosthetic loosening sinks caused by the line of force malalignment of bone side position.
Claims (5)
1. a kind of tumorous type knee-joint prosthesis intramedullary needle, it is characterised in that：Including inserting the femur in marrow cavity of femur in operation
Intramedullary pin hypomere (1) and femur bone marrow pin epimere (7) and by femur bone marrow pin hypomere (1) and femur bone marrow pin epimere (7) even
Pick up the self adaptation part come and make intramedullary needle have certain rotational freedom；The self adaptation part includes being arranged on femur bone marrow
The self adaptation support column (5) of pin epimere (7) end, the inner pinhole (6) opened up on self adaptation support column (5)；In femur bone marrow
The outer pin-and-hole (2) opened up in the end sidewalls of pin hypomere (1), in the self adaptation branch that the end of femur bone marrow pin hypomere (1) opens up
The self adaptation that platen (5) is inserted into supports taper hole (4)；Also include being inserted into the pin (3) of outer pin-and-hole (2) and inner pinhole (6)；
The self adaptation supports taper hole (4) and carries angle of inclination with tapered i.e. hole wall, is set to 5 ° of all directions, it is allowed in Using prosthesis
During self adaptation support column (5) and thereon part can relative self adaptation supporting taper hole (4) and its underpart have certain inclined
The free degree is leaned on, preferably to adapt to different marrow cavity of femur shapes；The rest of self adaptation supporting taper hole (4) is needed after implantation
By Cement fixation limiting its relative motion.
2. tumorous type knee-joint prosthesis intramedullary needle according to claim 1, it is characterised in that：The a diameter of 8- of intramedullary needle
13mm, self adaptation portion size is small, only lays single pin, while in order to ensure the shear strength of pin (3) and reduce to certainly
The weakening that support column (5), self adaptation support taper hole (4) hole wall tension Compressive Strength is adapted to, the cross section for selling (3) is ellipse.
3. tumorous type knee-joint prosthesis intramedullary needle according to claim 1, it is characterised in that：The outer pin-and-hole (2) and pin
(3) with being combined into interference fit, to prevent to sell the slip along pin (3) axis direction during implantation and use.
4. tumorous type knee-joint prosthesis intramedullary needle according to claim 1, it is characterised in that：The horizontal stroke of the inner pinhole (6)
Sectional dimension is more than presence of the cross sectional dimensions of pin (3) to ensure pin (3) will not hinder prosthese adaptive process.
5. tumorous type knee-joint prosthesis intramedullary needle according to claim 1, it is characterised in that：The self adaptation support column
(5) top and the bottom of self adaptation supporting taper hole (4) employs spherical surface, makes the two be 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 CN104921796A (en) | 2015-09-23 |
| CN104921796B true 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 |
Country Status (1)
| Country | Link |
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| CN (1) | CN104921796B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105943093B (en) * | 2016-07-08 | 2019-10-25 | 江苏风和医疗器材股份有限公司 | A kind of medical load-engaging device |
| 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 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6953479B2 (en) * | 2001-07-16 | 2005-10-11 | Smith & Nephew, Inc. | 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 |
| JP4659044B2 (en) * | 2004-12-17 | 2011-03-30 | デピュイ・プロダクツ・インコーポレイテッド | Modular shaft and collar implant |
| EP2394606A1 (en) * | 2010-06-11 | 2011-12-14 | WALDEMAR LINK GmbH & Co. KG | Prosthetic for partial replacement of a long 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 |
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2015
- 2015-07-08 CN CN201510397557.8A patent/CN104921796B/en active Active
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| Publication number | Publication date |
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| CN104921796A (en) | 2015-09-23 |
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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. |