CN106667545A - Total knee prosthesis extramedullary locating rule - Google Patents
Total knee prosthesis extramedullary locating rule Download PDFInfo
- Publication number
- CN106667545A CN106667545A CN201710065772.7A CN201710065772A CN106667545A CN 106667545 A CN106667545 A CN 106667545A CN 201710065772 A CN201710065772 A CN 201710065772A CN 106667545 A CN106667545 A CN 106667545A
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- Prior art keywords
- locating rod
- supporting leg
- hinged
- femur
- rod
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Classifications
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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
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/17—Guides or aligning means for drills, mills, pins or wires
- A61B17/1732—Guides or aligning means for drills, mills, pins or wires for bone breaking devices
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/17—Guides or aligning means for drills, mills, pins or wires
- A61B17/1739—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body
- A61B17/1764—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body for the knee
- A61B17/1767—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body for the knee for the patella
-
- 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)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Engineering & Computer Science (AREA)
- Dentistry (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
- Prostheses (AREA)
Abstract
The invention discloses a total knee prosthesis extramedullary locating rule, comprising a first leg positioning rod and a second leg positioning rod; one end of each of the first leg positioning rod and the second leg positioning rod is hinged to each other, and the other end is freely separated or closed, wherein public hinging ends of the first leg positioning rod and the second leg positioning rod are hinged with thighbone mechanical axis locating rods; the thighbone mechanical axis locating rods are always located on an included angle bisector between the first leg positioning rod and the second leg positioning rod through a first shape keeping structure; the shape keeping structure comprises a slide block, a first pull rod and a second pull rod which have equal length; the slide block is glidingly arranged on the thighbone mechanical axis locating rods, one end of each of the first pull rod and the second pull rod is respectively hinged at both sides of the slide block and used for pushing/pulling the slide block to glide along the thighbone mechanical axis locating rods. The locating rule is quick in structure location, high in precision, simple in operation, high in safety, and low in cost.
Description
Technical field
The present invention relates to technical field of medical instruments, and in particular to a kind of knee prosthesises marrow outside fix chi.
Background technology.
As modern prosthetic design is developed rapidly with manufacturing technology, knee replacements are extensively opened in worldwide
Exhibition.Accurate lower limb and the prosthese line of force are recovered to be considered as one of successful key of total knee arthroplasty, pursue the essence of operation
Standard is the development trend of total knee arthroplasty.One important step of precision is that operation osteotomy positions current proximal tibia
Osteotomy positioning adopts marrow outside fix mode substantially, and distal femur osteotomy is fixed using marrow outside fix or area of computer aided except only a few
Position is outer still substantially using positioning mode in marrow.In marrow positioning osteotomy exist some it is inevitable the drawbacks of：1. im rod destroys marrow
Intracavity blood supply, increased bleeding risk；2. lipochondrion or thrombosis return the heart in possible pulp cavity, cause potential cardiovascular concurrent
Disease；3. im rod size is often partially thin with respect to pulp cavity, inserts the too short non-central swing that may cause im rod in pulp cavity, inserts
Enter it is too deep, may cause position rod bending；4. some special cases, such as femoral shaft are extremely lopsided, femoral shaft Ineffective internal fixation,
Pulp cavity locking etc. after malunion of fracture, osteomyelitis, it is impossible to position using in marrow；5. valgus deformity severe patient is often in part
Merge femoral rotation, cause preoperative total length X-ray film measurement error, affect the judgement of mechanical axis and anatomical axis angle；6. it is most false
Body apparatus only has the femur valgus angle of minority special angle（Mostly 5 °, 6 °, 7 °）, it is impossible to it is further accurate；7. position only in marrow
The concern coronalplane line of force, have ignored the accuracy of the sagittal plane line of force substantially, and sagittal plane pulp cavity direction exists with mechanical direction of principal axis
Difference necessarily cause the exception of femoral prosthesiss bend and stretch position installation.
In recent years CAOS, individuation customization osteotomy module etc. are gradually applied to clinic, in certain journey
The accuracy of operation can be improved on degree.But the shortcomings of these methods have expensive, operating time length, learning curve is long, mesh
It is front also not in wide clinical application.Also scholar devises relatively practical mechanical type femur marrow outside fix instrument, but precision is big
Cannot compare favourably with positioning instrument in marrow more, the postoperative imaging evaluation line of force is not good.
The content of the invention
It is an object of the invention to overcome the problem that prior art is present, there is provided a kind of knee prosthesises marrow outside fix chi.
To realize above-mentioned technical purpose, above-mentioned technique effect is reached, the present invention is achieved through the following technical solutions：
A kind of knee prosthesises marrow outside fix chi, including the first supporting leg locating rod and the second supporting leg locating rod, first supporting leg
One end of locating rod and the second supporting leg locating rod is hinged, and the other end can arbitrarily separate or close up,
Femur mechanical axis locating rod is also hinged with the public hinged end of the first supporting leg locating rod and the second supporting leg locating rod,
The femur mechanical axis locating rod is by a morpheme holding structure all the time in the first supporting leg locating rod and the second supporting leg locating rod
On enough Bisector of angle；
The morpheme holding structure includes slide block, the first isometric pull bar and the second pull bar, and the slide block is slidably arranged in stock
In bone mechanical axis locating rod, one end of first pull bar and the second pull bar is respectively hinged at the both sides of slide block, for push/pull cunning
Block slides along femur mechanical axis locating rod；
The other end of first pull bar is hinged in the first supporting leg locating rod and hinged place constitutes the first pin joint, and described the
The other end of two pull bars is hinged in the second supporting leg locating rod and hinged place constitutes the second pin joint, and first pin joint is arrived
The distance of public hinged end is equal to the second pin joint to the distance of public hinged end.
Further, the equal length of the first supporting leg locating rod and the second supporting leg locating rod.
Further, the locating slot along bar length direction is provided with the non-articulated end of the femur mechanical axis locating rod.
Further, the non-articulated end of the first supporting leg locating rod and the second supporting leg locating rod is respectively equipped with fixed knot
Structure.
Further, the fixed structure is concentric locating hole, and the concentric locating hole is used to follow one bone label hole,
Both centers of circle are made to overlap.
Further, the femur index aperture be one in fossa intercondylaris femorises fornix portion's central point along femur longitudinal axis near-end
The hole of the 2mm-4mm bored at 10mm-40mm.
Further, the auxiliary fixing structure being engaged with fixed structure is also included, the auxiliary fixing structure includes one
Hollow circular cylinder, the hollow circular cylinder stretches in concentric locating hole and mutually forms homocentric secure fit, the hollow circuit cylinder
It is provided with a circular protrusion week in vitro, a fixing hole groove is formed between the body of rod around the circular protrusion and concentric locating hole, just
Clamp with one heart in corresponding clamping device, prevent from slipping, and keep hollow circular cylinder to relatively rotate with clamping device, do not make water
Flat, vertical displacement.
The invention has the beneficial effects as follows:
Present configuration only need to arbitrarily take two location points in patient's lower limb abduction or interior time receiving, complete one with late-segmental collapse
For summit, femoral intercondylar index aperture abduction, interior receipts position when line for base isosceles triangle, first of positioning rule of the present invention
Lower limb locating rod and the second supporting leg locating rod are mirror image relationship, the isosceles triangle that a base can change are formed, when first
The concentric locating hole of lower limb locating rod and the second supporting leg locating rod end and concentric locating when femoral intercondylar index aperture abduction, interior receipts position
When hole coincides, the isoceles triangle formed with positioning rule of the present invention for the base of the isosceles triangle on summit by late-segmental collapse point
The base of shape shares and overlaps, and forms the isosceles triangle on two common bases, then the femur mechanical axis locating rod in the middle of positioning rule
Necessarily coincide with the bisector by late-segmental collapse point for the isosceles triangle on summit, the femur mechanical axis in the middle of positioning rule is determined
Position bar extended line necessarily passes through late-segmental collapse point, and now the position of femur mechanical axis locating rod is the mechanical axis of femur, its
Positioning is quick, high precision, simple to operate, safe, low cost.
Description of the drawings
Fig. 1 is the overall structure diagram of positioning rule of the present invention；
Fig. 2 is the auxiliary fixing structure axonometric chart of the present invention.
Fig. 3 is the auxiliary fixing structure front view of the present invention.
Fig. 4 is the auxiliary fixing structure of the present invention and the matching chart of clamping device.
Fig. 5 is at first concentric locating hole demarcation of positioning rule of the present invention.
Fig. 6 is at second concentric locating hole demarcation of positioning rule of the present invention.
Fig. 7 is at the positioning of femur mechanical axis locating rod of positioning rule of the present invention.
Fig. 8 is the positioning schematic of positioning rule of the present invention.
Label declaration in figure：1st, the first supporting leg locating rod, the 2, second supporting leg locating rod, 3, public hinged end, 4, femur machine
Tool axle locating rod, 41, locating slot, 5, slide block, the 6, first pull bar, the 61, first pin joint, the 7, second pull bar, 71, second is hinged
Point, 8, concentric locating hole, 9, hollow circular cylinder, 91, circular protrusion, 92, fixing hole groove, 10, femur, 11, late-segmental collapse
Point, 12, fossa intercondylaris femorises fornix portion central point, 13, universal connection rod, 14, folder with one heart.
Specific embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments describing the present invention in detail.
With reference to shown in Fig. 1, a kind of knee prosthesises marrow outside fix chi, including the first supporting leg locating rod 1 and the second supporting leg it is fixed
Position bar 2, one end of the first supporting leg locating rod 1 and the second supporting leg locating rod 2 is hinged, the other end can arbitrarily separate or
Close up, wherein,
Femur mechanical axis positioning is also hinged with the public hinged end 3 of the first supporting leg locating rod 1 and the second supporting leg locating rod 2
Bar 4, the femur mechanical axis locating rod 4 is by a morpheme holding structure all the time in the first supporting leg locating rod 1 and the second supporting leg
On the enough Bisector of angle of locating rod 2；
The morpheme holding structure includes slide block 5, the first isometric pull bar 6 and the second pull bar 7, and the slide block 5 is slidably arranged
In femur mechanical axis locating rod 4, one end of the pull bar 7 of first pull bar 6 and second is respectively hinged at the both sides of slide block 5, uses
Slide along femur mechanical axis locating rod 4 in push/pull slide block 5；
The other end of first pull bar 6 is hinged in the first supporting leg locating rod 1 and hinged place constitutes the first pin joint 61, institute
The other end for stating the second pull bar 7 is hinged in the second supporting leg locating rod 2 and hinged place the second pin joint 71 of composition, and described first
Pin joint 61 to the distance of public hinged end 3 is equal to the second pin joint 71 to the distance of public hinged end 3.
The equal length of the first supporting leg locating rod 1 and the second supporting leg locating rod 2.
The locating slot 41 along bar length direction is provided with the non-articulated end of the femur mechanical axis locating rod 4.
The non-articulated end of the first supporting leg locating rod 1 and the second supporting leg locating rod 2 is respectively equipped with fixed structure.
The fixed structure is concentric locating hole 8, and the concentric locating hole 8 is used to follow one bone label hole, makes both
The center of circle overlaps.
The femur index aperture be one in fossa intercondylaris femorises fornix portion central point 12 along the longitudinal axis near-end 10mm-40mm of femur 10
The hole of the 2mm-4mm that place bores, in specific operation, can finely tune femur according to the specification of the positioning rule size for being adopted
The position of index aperture.
With reference to shown in Fig. 2 and Fig. 4, also include the auxiliary fixing structure being engaged with fixed structure, the auxiliary fixed knot
Structure includes a hollow circular cylinder 9, and the hollow circular cylinder 9 stretches in concentric locating hole 8 and mutually form homocentric secure fit, institute
State the periphery of hollow circular cylinder 9 and be provided with a circular protrusion 91, formed between the body of rod around the circular protrusion 91 and concentric locating hole 8
One fixing hole groove 92, is easy to corresponding clamping device to clamp with one heart, prevents from slipping, and keeps hollow circular cylinder 9 with clamping work
Tool is relatively rotated, and does not make level, vertical displacement, and in the present embodiment, with continued reference to described in Fig. 4, clamping device adopts universal company
The concentric folder 14 that extension bar 13 and its head are provided with, presss from both sides with one heart 14 and is clamped at fixing hole groove 92, with one heart folder 14 and hollow circle
Cylinder 9 keeps relatively rotating in clamping, so as to keep the axle center of hollow circular cylinder 9 to rotate in the center of circle of femur index aperture.
Course of action of the present invention and principle
When positioning in the present invention：
1. first suffering limb stretched into an abduction certain angle, forward, the near-end of central point 12 is along stock in fossa intercondylaris femorises fornix portion for tiptoe
The femur index aperture of an about 3mm is bored at the bone longitudinal axis about 15mm；
2. with reference to shown in Fig. 5, will be fixed with one heart in the first supporting leg locating rod 1 or the second supporting leg locating rod 2 of positioning rule of the present invention
Position hole 8 is moved at femur index aperture, and therewith the center of circle overlaps, and is pressed from both sides with the circular folder of the common universal connection rod for being fixed on operation table
Hold the concentric fixing hole, fixedly locked universal connection rod；
3. with reference to shown in Fig. 6, then suffering limb is stretched receive in position certain angle, tiptoe is forward, remaining another by positioning rule of the present invention
The concentric locating hole 8 of one supporting leg locating rod is moved at femur index aperture, and with method, therewith the center of circle overlaps, and with being fixed on operation table
The circular folder of another universal connection rod clamps the concentric fixing hole, fixedly locked universal connection rod；
4. with reference to shown in Fig. 7, finally moving to suffering limb at the femur mechanical axis locating rod 4 of centre, the femur index aperture center of circle with it is fixed
The position bisector of groove 41 coincides, and locating slot 41 orientates mechanical axis as, and in locating slot 41 two pieces of positioning needles, installation form are pierced
Osteotomy.
5. with method suffering limb positioned at sagittal plane make horizontal position and raise when, the Crestor position sagittal plane line of force.
The principle of the invention：
With reference to shown in Fig. 8, using isosceles triangle property：The drift angle bisector of isosceles triangle, the center line on base, on base
Height overlap（Write a Chinese character in simplified form into " unification of the line of isosceles triangle three "）, it is possible thereby to release：If two isosceles triangles are shared
Same base, its drift angle bisector necessarily overlaps.When lower limb abduction, interior time receiving, that is, complete one with late-segmental collapse as summit,
Line is the isosceles triangle on base when femoral intercondylar index aperture abduction, interior receipts position, and the first supporting leg of positioning rule of the present invention is positioned
The supporting leg locating rod 2 of bar 1 and second is mirror image relationship, forms the isosceles triangle that a base can change, when the first supporting leg is determined
The concentric locating hole 8 of the end of position bar 1 and second supporting leg locating rod 2 and concentric locating when femoral intercondylar index aperture abduction, interior receipts position
When hole 8 coincides, the isosceles formed with positioning rule of the present invention for the base of the isosceles triangle on summit by late-segmental collapse point 11
The base of triangle shares and overlaps, and forms the isosceles triangle on two common bases.Femur mechanical axis then in the middle of positioning rule is determined
Position bar 4 necessarily coincides with the bisector by late-segmental collapse point for the isosceles triangle on summit, the femur machine in the middle of positioning rule
The extended line of tool axle locating rod 4 necessarily passes through femoral head, and now the position of femur mechanical axis locating rod 4 is the femur to be found
Mechanical axis.
Furthermore, it is necessary to explanation, unless stated otherwise or points out, term " first " otherwise in description, " the
The description such as two " is used only for distinguishing each component, element, step in description etc., rather than for representing each component, unit
Logical relation or ordering relation between element, step etc..
The preferred embodiments of the present invention are the foregoing is only, the present invention is not limited to, for the skill of this area
For art personnel, the present invention can have various modifications and variations.It is all within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (7)
1. a kind of knee prosthesises marrow outside fix chi, including the first supporting leg locating rod（1）With the second supporting leg locating rod（2）, it is described
First supporting leg locating rod（1）With the second supporting leg locating rod（2）One end it is hinged, the other end can arbitrarily separate or close up,
Characterized in that,
In the first supporting leg locating rod（1）With the second supporting leg locating rod（2）Public hinged end（3）Also it is hinged with femur machinery
Axle locating rod（4）, the femur mechanical axis locating rod（4）First supporting leg locating rod is in all the time by a morpheme holding structure
（1）With the second supporting leg locating rod（2）On enough Bisector of angle；
The morpheme holding structure includes slide block（5）, isometric first pull bar（6）With the second pull bar（7）, the slide block（5）It is sliding
Femur mechanical axis locating rod is arranged on dynamicly（4）On, first pull bar（6）With the second pull bar（7）One end be respectively hinged at
Slide block（5）Both sides, for push/pull slide block（5）Along femur mechanical axis locating rod（4）Slide；
First pull bar（6）The other end be hinged on the first supporting leg locating rod（1）Upper and hinged place constitutes the first pin joint
（61）, second pull bar（7）The other end be hinged on the second supporting leg locating rod（2）Upper and hinged place constitutes the second pin joint
（71）, first pin joint（61）To public hinged end（3）Distance be equal to the second pin joint（71）To public hinged end（3）
Distance.
2. knee prosthesises marrow outside fix chi according to claim 1, it is characterised in that the first supporting leg locating rod
（1）With the second supporting leg locating rod（2）Equal length.
3. knee prosthesises marrow outside fix chi according to claim 1, it is characterised in that the femur mechanical axis locating rod
（4）Non-articulated end at be provided with locating slot along bar length direction（41）.
4. the knee prosthesises marrow outside fix chi according to claim 1 or 3, it is characterised in that the first supporting leg positioning
Bar（1）With the second supporting leg locating rod（2）Non-articulated end be respectively equipped with fixed structure.
5. knee prosthesises marrow outside fix chi according to claim 4, it is characterised in that the fixed structure is fixed with one heart
Position hole（8）, the concentric locating hole（8）For following one bone label hole, both centers of circle are made to overlap.
6. knee prosthesises marrow outside fix chi according to claim 5, it is characterised in that the femur index aperture be one
Fossa intercondylaris femorises fornix portion central point（12）Along femur（10）The hole of the 2mm-4mm bored at longitudinal axis near-end 10mm-40mm.
7. knee prosthesises marrow outside fix chi according to claim 5, it is characterised in that also include and fixed structure matches
The auxiliary fixing structure of conjunction, the auxiliary fixing structure includes a hollow circular cylinder（9）, the hollow circular cylinder（9）Stretch into same
Heart location hole（8）In and mutually form homocentric secure fit, the hollow circular cylinder（9）Periphery is provided with a circular protrusion（91）,
The circular protrusion（91）With concentric locating hole（8）A fixing hole groove is formed between the body of rod of surrounding（92）, it is easy to corresponding folder
Hold instrument to clamp with one heart, prevent from slipping, and keep hollow circular cylinder（9）Relatively rotate with clamping device, do not make level, vertical position
Move.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710065772.7A CN106667545A (en) | 2017-02-06 | 2017-02-06 | Total knee prosthesis extramedullary locating rule |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710065772.7A CN106667545A (en) | 2017-02-06 | 2017-02-06 | Total knee prosthesis extramedullary locating rule |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106667545A true CN106667545A (en) | 2017-05-17 |
Family
ID=58860241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710065772.7A Pending CN106667545A (en) | 2017-02-06 | 2017-02-06 | Total knee prosthesis extramedullary locating rule |
Country Status (1)
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| CN (1) | CN106667545A (en) |
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| CN203619636U (en) * | 2013-12-26 | 2014-06-04 | 潍坊医学院 | Epidural anesthesia puncture needle |
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| CN204281022U (en) * | 2014-10-28 | 2015-04-22 | 浙江吉利控股集团有限公司 | Rear overhang beam suspender |
| CN205493974U (en) * | 2016-02-02 | 2016-08-24 | 郑明辉 | Bone os pelvicum rolls over locator that resets |
| CN205866761U (en) * | 2016-05-25 | 2017-01-11 | 重庆医科大学附属第一医院 | Knee joint side position adjusting device |
| CN107049417A (en) * | 2017-03-29 | 2017-08-18 | 苏州市吴中人民医院 | T-shaped positioning rule outside a kind of knee prosthesis marrow |
| CN207520179U (en) * | 2017-02-06 | 2018-06-22 | 翟延荣 | A kind of outer positioning rule of knee prosthesis marrow |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| SU1638037A1 (en) * | 1989-03-27 | 1991-03-30 | Николаевский Филиал Одесского Сельскохозяйственного Института | Drafting tool |
| US6974467B1 (en) * | 2002-11-04 | 2005-12-13 | Gonzales Jr Antonio | Method and apparatus for making a precise surgical incision |
| CN2614930Y (en) * | 2003-04-14 | 2004-05-12 | 陈志豪 | Multifunction triangular compass |
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| CN202186192U (en) * | 2011-09-08 | 2012-04-11 | 张露秋 | Angular bisector drawing device |
| CN202891969U (en) * | 2012-11-25 | 2013-04-24 | 王兴国 | Support carrier for axial X ray examinations of patellae |
| CN202908707U (en) * | 2012-11-30 | 2013-05-01 | 华北石油管理局总医院 | Clavicle midpoint gauge |
| CN203185932U (en) * | 2013-06-27 | 2013-09-11 | 河南职业技术学院 | Multipurpose drawing ruler with protractor |
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| CN204029215U (en) * | 2014-08-27 | 2014-12-17 | 李扬剑 | Angular bisector theorem demonstrating model |
| CN204281022U (en) * | 2014-10-28 | 2015-04-22 | 浙江吉利控股集团有限公司 | Rear overhang beam suspender |
| CN205493974U (en) * | 2016-02-02 | 2016-08-24 | 郑明辉 | Bone os pelvicum rolls over locator that resets |
| CN205866761U (en) * | 2016-05-25 | 2017-01-11 | 重庆医科大学附属第一医院 | Knee joint side position adjusting device |
| CN207520179U (en) * | 2017-02-06 | 2018-06-22 | 翟延荣 | A kind of outer positioning rule of knee prosthesis marrow |
| CN107049417A (en) * | 2017-03-29 | 2017-08-18 | 苏州市吴中人民医院 | T-shaped positioning rule outside a kind of knee prosthesis marrow |
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Application publication date: 20170517 |