CN107753156A - Patient-specific knee-joint prosthesis - Google Patents
Patient-specific knee-joint prosthesis Download PDFInfo
- Publication number
- CN107753156A CN107753156A CN201710975411.6A CN201710975411A CN107753156A CN 107753156 A CN107753156 A CN 107753156A CN 201710975411 A CN201710975411 A CN 201710975411A CN 107753156 A CN107753156 A CN 107753156A
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- China
- Prior art keywords
- joint
- patient
- coronal
- condyle
- femur
- 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
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/38—Joints for elbows or knees
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/38—Joints for elbows or knees
- A61F2/3859—Femoral components
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/38—Joints for elbows or knees
- A61F2/3877—Patellae or trochleae
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/38—Joints for elbows or knees
- A61F2/389—Tibial components
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0058—Additional features; Implant or prostheses properties not otherwise provided for
Abstract
The present invention provides a kind of patient-specific knee-joint prosthesis, recover joint proper motion for substituting damaged joints face in total knee arthroplasty, it includes being mounted on the condyle of femur on patient femur and the shin bone pad coordinated with condyle of femur, the condyle of femur has the femoral bone pulley coordinated with patellar prosthesis, the femoral bone pulley has facies articularis patellae, and the facies articularis patellae is made up of multiple curved surfaces of different curvature on coronal-plane.The facies articularis patellae have on coronal-plane in first reduce and then keep radius of curvature that constant trend sets with the increase of joint flexion angle, be made up of its curved surface tangent line and be in first to reduce and then keep the angle that constant trend is set and the depth deepened with the increase of joint flexion angle with the increase of joint flexion angle, the femoral bone pulley of condyle of femur can be made continually and steadily to be contacted with patellar prosthesis, avoid patellar prosthesis from departing from the high curvature movement in joint with condyle of femur, improve the stability of patient-specific knee-joint prosthesis.
Description
【Technical field】
The present invention relates to orthopedic medical device technical field, more particularly to one kind to be used to substitute damaged joints face, recover to close
Save proper motion, and can avoid in the high curvature movement in joint occur dislocation or stress concentrate and the patient of unstable wear is special
Property knee-joint prosthesis.
【Technical background】
Joint replacement is that the joint manually manufactured replaces pain and a kind of forfeiture the of function of joint treats joint disease
Method.It is generally used for replacement damaged joints face in total knee arthroplasty to set including group to recover the knee-joint prosthesis of joint motions
In the condyle of femur on femur, the patellar prosthesis for being mounted on kneecap and coordinating with condyle of femur, the tibial prosthesis being mounted on shin bone
And the shin bone pad between condyle of femur and tibial prosthesis.
Condyle of femur include a pair spaced entocondyles with external condyle, be connected the femur cunning of entocondyle and external condyle front end
Car and connection entocondyle and the cam of upper end after external condyle.Condyle of femur also has passage corresponding with the fossa intercondyloidea of femur, uses
Pass through in for posterior cruciate ligament of knee.Passage is enclosed to set by entocondyle, external condyle, cam and femoral bone pulley lower end to be formed.Condyle of femur has
There is the femoral joint face coordinated with shin bone pad.Femoral bone pulley has the facies articularis patellae coordinated with patellar prosthesis.
Together with shin bone pad is located at by grafting snap close mode with tibial prosthesis fixation group, it has disc shaped base, by base portion
Depression is formed downwards two spaced dented spaces and position is extended positioned at two dented spaces between by base portion
Locating dowel.Dented space is respectively used to house the entocondyle and external condyle of condyle of femur, thereon formed with the femur of condyle of femur pass
The tibial prosthesis face that nodal section coordinates.Locating dowel passes through the passage of condyle of femur, can be with when knee-joint prosthesis carries out high curvature movement
The cam engagement of condyle of femur.
Knee-joint prosthesis is coordinated by the tibial prosthesis face in the femoral joint face of condyle of femur and shin bone pad and condyle of femur
The cooperation of facies articularis patellae and patellar prosthesis substitutes damaged joints face, recovery joint motions to realize it in joint curvature movement
Function, but the femoral bone pulley depth as shallow of the condyle of femur due to existing knee-joint prosthesis is in high flexing in knee-joint prosthesis
Patellar prosthesis can be caused to dislocate during motion；And the facies articularis patellae of condyle of femur is typically to be set using same curvature, with kneecap
The curved surface of bone prosthese can not match completely, can aggravate the abrasion of patellar prosthesis.
Therefore, it is necessory to provide a kind of patient-specific knee-joint prosthesis, to overcome defect present in prior art.
【The content of the invention】
It is an object of the invention to a kind of patient-specific knee-joint prosthesis for improving stability and slowing down abrasion.
To achieve the above object, patient-specific knee-joint prosthesis of the invention is achieved by the following technical solution：
A kind of patient-specific knee-joint prosthesis, recover joint proper motion for substituting damaged joints face in total knee arthroplasty,
It includes being mounted on the condyle of femur on patient femur and the shin bone pad coordinated with condyle of femur, and condyle of femur includes a pair of interval settings
Entocondyle with external condyle and be connected the femoral bone pulley of entocondyle and external condyle front end, shin bone pad has base portion and by base portion
The depressed part at two intervals that depression is formed, the femoral bone pulley have facies articularis patellae downwards, and the facies articularis patellae is coronal
It is to be made up of multiple curved surfaces of different curvature on face.
Preferably, radius of curvature of the facies articularis patellae on coronal-plane is in and first subtracted with the increase of joint flexion angle
Trend small and then that holding is constant is set.
Preferably, the facies articularis patellae has the angle being made up of its curved surface tangent line on coronal-plane, and the angle is in
First reduce with the increase of joint flexion angle and then keep constant trend to set.
Preferably, the facies articularis patellae has the depth deepened with the increase of joint flexion angle.
Preferably, the depth of the facies articularis patellae is in the range of 1~6mm.
Preferably, the angle that the tangent line of the facies articularis patellae each curved surface on coronal-plane is formed is in 150 degree and 130 degree
Between.
Preferably, the facies articularis patellae has the first mating surface coordinated with patellar prosthesis, and first mating surface exists
Radius of curvature on coronal-plane reduces, first mating surface each curved surface on coronal-plane with the increase of joint flexion angle
Tangent line form angle reduce with the increase of joint flexion angle.
Preferably, the facies articularis patellae also has the second mating surface coordinated with kneecap, and second mating surface has
Identical radius of curvature on coronal-plane, the angle phase of the tangent line composition of the second mating surface each curved surface on coronal-plane
Together.
Preferably, second mating surface is connected with the first mating surface, curvature of second mating surface on coronal-plane
Minimum profile curvature radius of the radius with the first mating surface on coronal-plane is identical.
Preferably, the angle that the tangent line of the second mating surface each curved surface on coronal-plane is formed is being preced with the first mating surface
Minimum angle in the angle that the tangent line of each curved surface is formed on shape face is identical.
The facies articularis patellae of the femoral bone pulley of patient-specific knee-joint prosthesis provided by the invention has on coronal-plane
In radius of curvature, the tangent line composition in each curved surface for increasing with joint flexion angle and reducing and then keep constant trend to set
And reduce in increasing with joint flexion angle and then keep constant angle and deepen in increasing with joint flexion angle
Depth, femoral bone pulley can be made continually and steadily to be contacted with patellar prosthesis during the increase of joint flexion angle, avoided because of joint
The problem of flexion angle increases and causes patellar prosthesis to depart from the femoral bone pulley of condyle of femur, while the femur of condyle of femur can be avoided to slide
The problem of causing abrasion to aggravate because of unbalance stress between car and patellar prosthesis, and then reduce the mill of patient-specific knee-joint prosthesis
Damage.
【Brief description of the drawings】
Fig. 1 is the three-dimensional combination figure of the patient-specific knee-joint prosthesis of the present invention.
Fig. 2 is the three-dimensional exploded view of the patient-specific knee-joint prosthesis of the present invention.
Fig. 3 is the side view of the patient-specific knee-joint prosthesis shown in Fig. 1
Fig. 4 is the sectional view along A-A directions shown in Fig. 3
Fig. 5 is the side view of the condyle of femur of the patient-specific knee-joint prosthesis of the present invention.
Fig. 6 is the sectional view along B-B directions shown in Fig. 5, and wherein knee sprung angle is 0 degree.
Fig. 7 is the sectional view along C-C directions shown in Fig. 5, and wherein knee sprung angle is about 30 degree.
Fig. 8 is the sectional view along D-D directions shown in Fig. 5, and wherein knee sprung angle is about 60 degree.
Fig. 9 is the sectional view along E-E directions shown in Fig. 5, and wherein knee sprung angle is about 90 degree.
【Embodiment】
It is understandable to enable the above objects, features and advantages of the present invention to become apparent, below in conjunction with the accompanying drawings to the present invention
Specific embodiment be described in detail.
Fig. 1 to Fig. 9 show the present invention patient-specific knee-joint prosthesis 100 be used for total knee arthroplasty in
Substitute damaged joints faces, recover joint proper motion, it include condyle of femur 1 that fixation is mounted on patient femur (not shown) with
And the shin bone pad 2 coordinated with condyle of femur 1.Wherein, Fig. 6 is when patient-specific knee-joint prosthesis 100 is in 0 degree of curvature movement
Sectional view, Fig. 7 are sectional view when patient-specific knee-joint prosthesis 100 is about at 30 degree of curvature movements, and Fig. 8 is that patient is special
Property sectional view of the knee-joint prosthesis 100 when being about at 60 degree of curvature movements, Fig. 9 is that patient-specific knee-joint prosthesis 100 is about located
Sectional view when 90 degree of curvature movements.
The condyle of femur 1 includes a pair spaced entocondyles 10 and external condyle 11 and is connected entocondyle 10 and outside
The femoral bone pulley 12 of the front end of condyle 11.The condyle of femur 1, which has, to be located between entocondyle 10 and external condyle 11 and is set in running through vertically
The passage 14 put, it is available for posterior cruciate ligament of knee (not shown) to pass through.The passage 14 located at condyle of femur 1 and femur fossa intercondyloidea (not
Diagram) corresponding opening position.The passage 14 is enclosed to set and formed by entocondyle 10, external condyle 11 and the lower end of femoral bone pulley 12
's.The condyle of femur 1 has the femoral joint face 15 coordinated with shin bone pad 2.The femoral joint face 15 is by entocondyle 10
What the partial outer face of partial outer face and external condyle 11 was formed.The femoral joint face 15 has the identical on coronal-plane bent
Rate radius.
Please emphasis is matched completely with patellar prosthesis (not shown) refering to shown in Fig. 5 to Fig. 9, the femoral bone pulley 12 also has
Facies articularis patellae 120.The facies articularis patellae 120 is made up of the curved surface of multiple different curvature radius on coronal-plane.
It is in reduce and then keep constant again to become with the increase of joint flexion angle that the facies articularis patellae 120 has on coronal-plane
Gesture set radius of curvature, as shown in Fig. 6 to Fig. 9, patient-specific knee-joint prosthesis 100 be in 0 °, about 30 °, about 60 °,
During about 90 ° of curvature movements, radius of curvature of the facies articularis patellae 120 on coronal-plane is respectively R1, R2, R3, R4, and R1 ﹥ R2 ﹥ R3
=R4.The angle that the tangent line of each curved surface on coronal-plane of facies articularis patellae 120 is formed is in the increasing of joint flexion angle
Reduce greatly and then keep constant trend to set again, as shown in Fig. 6 to Fig. 9, patient-specific knee-joint prosthesis 100 is in
0 °, about 30 °, about 60 °, about 90 ° of curvature movements when, angle that each curved surface tangent line of the facies articularis patellae 120 on coronal-plane is formed
Respectively α1、α2、α3、α4, and α1﹥ α2﹥ α3=α4.The depth of the facies articularis patellae 120 is with the increase of joint flexion angle
And deepen, condyle of femur 1 can be made to remain to stabilization in high curvature movement with patellar prosthesis (not shown) and coordinated, avoid transporting in high flexing
When dynamic condyle of femur 1 with patellar prosthesis is (not shown) departs from, while can avoid the femoral bone pulley 12 of condyle of femur 1 with patellar prosthesis (not
Diagram) between because unbalance stress cause abrasion aggravate the problem of, so as to reduce the abrasion of patient-specific knee-joint prosthesis 100.
The depth of the facies articularis patellae 120 is in the range of 1~6mm.As shown in Figures 6 to 9, patient-specific knee-joint prosthesis
100 in 0 °, about 30 °, about 60 °, about 90 ° of curvature movements when, the depth of the facies articularis patellae 120 be respectively H1, H2, H3,
H4, and H1 ＜ H2 ＜ H3 ＜ H4.
The facies articularis patellae 120 has the first mating surface 121 and the second mating surface 122.First mating surface 121 exists
Radius of curvature on coronal-plane reduces with the increase of joint flexion angle, and the first mating surface 121 as shown in Figure 6 to 8 exists
Radius of curvature when patient-specific knee-joint prosthesis 100 is in 0 °, about 30 °, about 60 ° is respectively R1, R2, R3, and R1 ﹥ R2
﹥ R3.Second mating surface 122 has identical radius of curvature R 4.The radius of curvature R 4 and first of second mating surface 122
The minimum profile curvature radius R3 of mating surface 121 is identical.First mating surface 121 angle that each curved surface tangent line is formed on coronal-plane
Reduce with the increase of joint flexion angle, the first mating surface 121 as shown in Figure 6 to 8 is in patient-specific knee joint
Prosthese 100 be in 0 °, about 30 °, about 60 ° when radius of curvature be respectively α1、α2、α3, and α1﹥ α2﹥ α3.Second mating surface
122 angle αs that the tangent line of each curved surface is formed on coronal-plane4It is identical.Second mating surface 122 each curved surface on coronal-plane is cut
The angle α that line is formed4Equal to the first mating surface 121 minimum angle α that each curved surface tangent line is formed on coronal-plane3.The kneecap closes
The angle α that nodal section 120 is formed on coronal-plane between each curved surface tangent line1、α2、α3、α4Between 150 degree~130 degree.It is described
Facies articularis patellae 120 protrudes out shape in intermediate recess both sides and set.
Shin bone pad 2 is mounted on tibial prosthesis (not shown) by grafting snap close mode, positioned at condyle of femur 1 and tibial prosthesis
Between (not shown).The shin bone pad 2 has the base portion 20 of setting in the form of annular discs and depression forms and is in downwards by base portion 20
It is spaced the depressed part 21,22 that shape is set.The depressed part 21,22 is respectively used to house the entocondyle 10 and external condyle of condyle of femur 1
11.The shin bone pad 2 has the tibial prosthesis face 23 coordinated with the femoral joint face 15 of condyle of femur 1.The tibial prosthesis face 23
It is to be made up of the upper surface of two depressed parts 21,22.
Please emphasis refering to shown in Fig. 2 to Fig. 4, the tibial prosthesis face 23 is on coronal-plane by two different radius of curvature
R1'、R2' curved surface form, two curved surface is respectively the first bearing surface 230 and the second bearing surface 231.First bearing surface 230
Can be with the inner side of the entocondyle 10 of condyle of femur 1 or the fit inside of external condyle 11.Second bearing surface 231 can be with condyle of femur
The outside of 1 entocondyle 10 or the outside of external condyle 11 coordinate.The curvature of first bearing surface 230 in the tibial prosthesis face 23 half
Footpath R1' slightly larger than condyle of femur 1 femoral joint face 15 radius of curvature.Second bearing surface 231 in the tibial prosthesis face 23
Radius of curvature R2' more than the radius of curvature of the first bearing surface 230.First bearing surface 230 and femur in the tibial prosthesis face 23
The matching degree in the femoral joint face 15 of condyle 1, can higher than the second bearing surface 231 and the matching degree in the femoral joint face 15 of condyle of femur 1
Beneficial to motion of being turned up in knee-joint prosthesis during curvature movement, so that knee-joint prosthesis more they tends to human synovial and transported naturally
It is dynamic.
The facies articularis patellae 120 of the femoral bone pulley 12 of the condyle of femur 1 of the patient-specific knee-joint prosthesis 100 of the present invention exists
Reduce on coronal-plane with the increase with joint flexion angle and then keep constant multiple radius of curvature, with by each curved surface
It is that tangent line is formed and increase with joint flexion angle and reduce and then keep constant angle and the increasing with joint flexion angle
Big and intensification depth, the femoral bone pulley 12 of condyle of femur 1 can be made (not scheme with patellar prosthesis during the increase of joint flexion angle
Show) continually and steadily contact, avoid patellar prosthesis (not shown) from departing from the femoral bone pulley 12 of condyle of femur 1 in high flexion angle, carry
The stability of high patient-specific knee-joint prosthesis 100, at the same can avoid the femoral bone pulley 12 of condyle of femur 1 with patellar prosthesis (not
Diagram) between because unbalance stress cause abrasion aggravate the problem of, reduce the abrasion of patient-specific knee-joint prosthesis 100.In addition,
The tibial prosthesis face 23 that the femoral joint face 15 of shin bone pad 2 and condyle of femur 1 coordinates is on coronal-plane by two different curvature half
First bearing surface 230, second bearing surface 231 in footpath are formed, and with the inner side of the entocondyle 10 of condyle of femur 1 or external condyle 11
The radius of curvature of the first bearing surface 230 of fit inside be less than and the outside of the entocondyle 10 of condyle of femur 1 or external condyle 11
The radius of curvature for the second bearing surface 231 that outside coordinates, first bearing surface 230 and condyle of femur 1 in tibial prosthesis face 23 can be made
The matching degree in femoral joint face 15 is beneficial to higher than the second bearing surface 231 and the matching degree in the femoral joint face 15 of condyle of femur 1
The interior motion of turning up of knee-joint prosthesis during curvature movement, so that knee-joint prosthesis more they tends to human synovial proper motion.
To sum up, these are only presently preferred embodiments of the present invention, should not limit the scope of the present invention with this, i.e., it is every according to
The simple equivalent changes and modifications that claims of the present invention and present specification are made, it all should still belong to the present invention
In the range of patent covers.
Claims (10)
1. a kind of patient-specific knee-joint prosthesis, normal for substituting damaged joints face recovery joint in total knee arthroplasty
Motion, it includes being mounted on the condyle of femur on patient femur and the shin bone pad coordinated with condyle of femur, between condyle of femur includes a pair
With external condyle and be connected the femoral bone pulley of entocondyle and external condyle front end every the entocondyle of setting, shin bone pad have base portion and
Be recessed downwards two depressed parts being spaced formed by base portion, it is characterised in that：The femoral bone pulley has facies articularis patellae, described
Facies articularis patellae is made up of multiple curved surfaces of different curvature on coronal-plane.
2. patient-specific knee-joint prosthesis as claimed in claim 1, it is characterised in that：The facies articularis patellae is in coronal-plane
On radius of curvature in first reducing with the increase of joint flexion angle and then keep constant trend to set.
3. patient-specific knee-joint prosthesis as claimed in claim 2, it is characterised in that：The facies articularis patellae is in coronal-plane
Upper to have the angle being made up of its curved surface tangent line, the angle is in first to reduce with the increase of joint flexion angle and then keep
Constant trend is set.
4. patient-specific knee-joint prosthesis as claimed in claim 3, it is characterised in that：The facies articularis patellae has with pass
The depth for saving the increase of flexion angle and deepening.
5. patient-specific knee-joint prosthesis as claimed in claim 4, it is characterised in that：The depth of the facies articularis patellae
In the range of 1~6mm.
6. patient-specific knee-joint prosthesis as claimed in claim 3, it is characterised in that：The facies articularis patellae is in coronal-plane
The angle that the tangent line of upper each curved surface is formed is between 150 degree and 130 degree.
7. patient-specific knee-joint prosthesis as claimed in claim 4, it is characterised in that：The facies articularis patellae has and kneecap
The first mating surface that bone prosthese coordinates, radius of curvature of first mating surface on coronal-plane is with the increasing of joint flexion angle
Add and reduce, the angle of the tangent line composition of the first mating surface each curved surface on coronal-plane is with the increase of joint flexion angle
And reduce.
8. patient-specific knee-joint prosthesis as claimed in claim 7, it is characterised in that：The facies articularis patellae also have with
The second mating surface that kneecap coordinates, second mating surface have the identical radius of curvature on coronal-plane, and described second matches somebody with somebody
The angle that the tangent line of conjunction face each curved surface on coronal-plane is formed is identical.
9. patient-specific knee-joint prosthesis as claimed in claim 8, it is characterised in that：Second mating surface is matched somebody with somebody with first
Conjunction face connects, radius of curvature of second mating surface on coronal-plane and minimum curvature of first mating surface on coronal-plane half
Footpath is identical.
10. patient-specific knee-joint prosthesis as claimed in claim 9, it is characterised in that：Second mating surface is coronal
In the angle that the tangent line for angle and the first mating surface each curved surface on coronal-plane that the tangent line of each curved surface is formed is formed on face most
Small angle is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710975411.6A CN107753156A (en) | 2017-10-16 | 2017-10-16 | Patient-specific knee-joint prosthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710975411.6A CN107753156A (en) | 2017-10-16 | 2017-10-16 | Patient-specific knee-joint prosthesis |
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| Publication Number | Publication Date |
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| CN107753156A true CN107753156A (en) | 2018-03-06 |
Family
ID=61268735
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710975411.6A Pending CN107753156A (en) | 2017-10-16 | 2017-10-16 | Patient-specific knee-joint prosthesis |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112603604A (en) * | 2019-12-31 | 2021-04-06 | 北京力达康科技有限公司 | Total knee joint prosthesis |
| CN116059013A (en) * | 2023-03-29 | 2023-05-05 | 中国人民解放军联勤保障部队第九二〇医院 | Absorbable capsule spacer for implantation in patella joint and method of making same |
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| CN105030384A (en) * | 2015-08-03 | 2015-11-11 | 北京威高亚华人工关节开发有限公司 | Total-knee-joint replacement prosthesis |
| CN207755429U (en) * | 2017-10-16 | 2018-08-24 | 刘方 | Knee-joint prosthesis |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112603604A (en) * | 2019-12-31 | 2021-04-06 | 北京力达康科技有限公司 | Total knee joint prosthesis |
| EP3845205A1 (en) * | 2019-12-31 | 2021-07-07 | Beijing Lidakang Technology Co., Ltd | Full knee joint prosthesis |
| CN112603604B (en) * | 2019-12-31 | 2021-11-19 | 北京力达康科技有限公司 | Total knee joint prosthesis |
| CN116059013A (en) * | 2023-03-29 | 2023-05-05 | 中国人民解放军联勤保障部队第九二〇医院 | Absorbable capsule spacer for implantation in patella joint and method of making same |
| CN116059013B (en) * | 2023-03-29 | 2023-06-23 | 中国人民解放军联勤保障部队第九二〇医院 | Absorbable capsule spacer for implantation in patella joint and method of making same |
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