CN107951600A

CN107951600A - Condyle of femur and there is its knee-joint prosthesis

Info

Publication number: CN107951600A
Application number: CN201711102946.9A
Authority: CN
Inventors: 田华; 王彩梅
Original assignee: Peking University Third Hospital
Current assignee: Beijing AK Medical Co Ltd
Priority date: 2017-11-09
Filing date: 2017-11-09
Publication date: 2018-04-24
Anticipated expiration: 2037-11-09
Also published as: CN107951600B

Abstract

The present invention provides a kind of condyle of femur and there is its knee-joint prosthesis, wherein, condyle of femur is arranged between shin bone and femur, and condyle of femur includes：Condyle of femur main body, is arranged on femur close to one end of shin bone；Fixed structure, is arranged on the side that condyle of femur main body is in contact with femur, condyle of femur main body is fixedly connected on femur, and fixed structure includes matrix and the fixation tooth being arranged on matrix, and fixed tooth can extend into the sclerotin of femur.Technical scheme solves the problems, such as the easy loose or dislocation of condyle of femur in the prior art.

Description

Condyle of femur and there is its knee-joint prosthesis

Technical field

The present invention relates to medical instruments field, in particular to a kind of condyle of femur and has its knee-joint prosthesis.

Background technology

Knee joint single condyle displacement (UKA) has had more than the history of 30 years for treating the shin femoral joint inflammation in separate room.To the greatest extent Pipe reporting is ineffective, but has been developed as a kind of safe and reliable treatment method now.Ensure the treatment of UKA Effect, it is necessary to select appropriate case, consummate operation skill, avoid excessive correction deformity.This method is suitable for limitation The patient for the shin femoral joint inflammation that pain, mobility are good while Radiologic imaging is single-shot.Compared with total knee replacement, UKA Postoperative mobility bigger, patient satisfaction higher, and the prosthese survival rate of mid-term is suitable.

As surgical implant, single condyle knee joint is equally faced with prosthese fixation problem, and good fixation can realize vacation The early stage of body, medium-long term are fixed, and are prevented and prosthetic loosening, improve the service life of prosthese.At present, the fixation of single condyle femoral prosthesis Mode is relatively simple：Osteotomy surface cement reaction adds 1~2 short and thick spud pile, and long term still suffers from prosthetic loosening Risk, traditional approach since Medullary fixation stake is short and fixed form is single, there are fixed effect it is bad the problem of.Especially for The patient of osteoporosis, the effect and its limited that spud pile plays, single condyle femoral prosthesis is likely to occur pine after a period of time of living Dynamic situation about coming off.

The content of the invention

The present invention is intended to provide a kind of condyle of femur and there is its knee-joint prosthesis, existed with solving condyle of femur in the prior art Easily loosened in subjects bones, be difficult to the problem of effectively fixed and then influence patient's normal life.

To achieve these goals, according to an aspect of the invention, there is provided a kind of condyle of femur, is arranged on shin bone and stock Between bone, condyle of femur includes：Condyle of femur main body, is arranged on femur close to one end of shin bone；Fixed structure, is arranged on condyle of femur master The side that body is in contact with femur, condyle of femur main body is fixedly connected on femur, and fixed structure includes matrix and is arranged on Fixation tooth on matrix, fixed tooth can extend into the sclerotin of femur.

Further, matrix is cylindrical in shape, and the matrix of tubular includes spaced multiple shrapnels, and fixed tooth is arranged on part On shrapnel.

Further, multiple shrapnels include multiple movable spring slices and multiple fixation spring tabs, and the first end of fixation spring tab is fixed It is connected in condyle of femur main body, the second end of fixation spring tab is connected with the first end of adjacent movable spring slice, and the of movable spring slice Two ends extend for free end and towards condyle of femur main body, and fixed tooth is arranged in movable spring slice.

Further, multiple movable spring slices and multiple fixation spring tabs are staggered.

Further, fixed structure further includes pedestal, and multiple fixation spring tabs are arranged in condyle of femur main body by pedestal.

Further, fixed tooth is multiple that multiple fixed teeth are set along the axial direction of matrix, and the height of multiple fixed teeth is from base The setting that the end of body gradually increases to the root of matrix.

Further, it is provided with through hole on matrix, through hole is multiple, and multiple through holes are along the axial arranged of matrix.

Further, condyle of femur main body includes multiple planes at an angle to each other towards the surface of femur.

Further, multiple planes at an angle to each other include the first osteotomy surface, the line of force of first osteotomy surface perpendicular to femur Axis, the angle β between the axis of condyle of femur main body and the first osteotomy surface meet：70°≤β≤80°.

According to another aspect of the present invention, there is provided a kind of knee-joint prosthesis, including condyle of femur, condyle of femur are above-mentioned stock Bone condyle.

Apply the technical scheme of the present invention, set on the fixed structure of condyle of femur and can extend into consolidating in the sclerotin of femur Fixed tooth, increases the contact area between fixed structure and femur sclerotin, and will be viscous between original fixed structure and sclerotin The single fit system for connecing cooperation or interference fit replaces with interference fit and the complicated fit system contacted, reduces solid Determine the possibility that structure is separated with sclerotin, condyle of femur retroversion loosens.Especially for the patient of osteoporosis, tooth is fixed in implantation Sclerotin is can act on, increases bone density, can be contacted after completing to be implanted into sclerotin, fixed structure is reduced and loosens Possibility.

Brief description of the drawings

The accompanying drawings which form a part of this application are used for providing a further understanding of the present invention, and of the invention shows Meaning property embodiment and its explanation are used to explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：

Fig. 1 shows the structure diagram under the first visual angle of embodiment of condyle of femur according to the present invention；

Fig. 2 shows the structure diagram under the second visual angle of condyle of femur of Fig. 1；

Fig. 3 shows the partial schematic diagram that the set being used cooperatively with the condyle of femur of Fig. 1 bores；And

Fig. 4 shows the structure diagram under the movable spring slice open configuration of the condyle of femur of Fig. 1.

Wherein, above-mentioned attached drawing is marked including the following drawings：

10th, condyle of femur main body；20th, fixed structure；21st, matrix；211st, movable spring slice；212nd, fixation spring tab；22nd, it is fixed Tooth；23rd, pedestal；24th, through hole.

Embodiment

Below in conjunction with the attached drawing in the embodiment of the present application, the technical solution in the embodiment of the present application is carried out clear, complete Site preparation describes, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.Below Description only actually at least one exemplary embodiment is illustrative, is never used as to the application and its application or makes Any restrictions.Based on the embodiment in the application, those of ordinary skill in the art are not making creative work premise Lower all other embodiments obtained, shall fall in the protection scope of this application.

It should be noted that term used herein above is merely to describe embodiment, and be not intended to restricted root According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative It is also intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " bag Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.

Unless specifically stated otherwise, the component and positioned opposite, the digital table of step otherwise illustrated in these embodiments Up to the unlimited scope of the present application processed of formula and numerical value.At the same time, it should be appreciated that for the ease of description, each portion shown in attached drawing The size divided not is to be drawn according to actual proportionate relationship.For technology, side known to person of ordinary skill in the relevant Method and equipment may be not discussed in detail, but in the appropriate case, the technology, method and apparatus should be considered as authorizing explanation A part for book.In shown here and discussion all examples, any occurrence should be construed as merely exemplary, and Not by way of limitation.Therefore, the other examples of exemplary embodiment can have different values.It should be noted that：Similar label Similar terms is represented in following attached drawing with letter, therefore, once it is defined in a certain Xiang Yi attached drawing, then subsequent attached It need not be further discussed in figure.

The condyle of femur of the present embodiment is arranged between the shin bone of subject patient and femur, as shown in Figure 1, the stock of the present embodiment Bone condyle includes condyle of femur main body 10 and fixed structure 20.Wherein, condyle of femur main body 10 is arranged on femur close to one end of shin bone.Gu Determine structure 20 and be arranged on the side that condyle of femur main body 10 is in contact with femur, condyle of femur main body 10 is fixedly connected on femur On.Fixed structure 20 includes matrix 21 and the fixation tooth 22 being arranged on matrix 21, and fixed tooth 22 can extend into the sclerotin of femur In.

Using the technical solution of the present embodiment, set and can extend into the sclerotin of femur on the fixed structure 20 of condyle of femur Fixation tooth 22, increase the contact area between fixed structure 20 and femur sclerotin, and by original fixed structure and sclerotin Between bonding coordinate or complicated cooperation side that the single fit system of interference fit replaces with interference fit and contacts Formula, reduces the possibility that fixed structure 20 is separated with sclerotin, condyle of femur retroversion loosens.Especially for the patient of osteoporosis, Tooth 22 is fixed during implantation and can act on sclerotin, increases bone density, can contact, subtract with sclerotin after completing to be implanted into The possibility that few fixed structure loosens.

Preferably, fixed tooth 22 is plane towards the side of shin bone, is inclined-plane away from the side of shin bone.

Specifically, as depicted in figs. 1 and 2, the matrix 21 of the present embodiment is cylindrical in shape, and the matrix 21 of tubular includes being arranged at intervals Multiple shrapnels, fixed tooth 22 is arranged on the shrapnel of part.Matrix is cylindrical in shape the stock for alloing doctor to be drilled in subject patient with set Annular aperture is drilled through on bone with member-retaining portion femur sclerotin, and matrix is extend into annular aperture, make the surfaces externally and internally of matrix with Femur sclerotin contacts, and improves structural stability.Set multiple grooves matrix is divided into multiple shrapnels on matrix 21 and add matrix Elasticity, and then by adjusting the shape and angle of annular aperture and the shape and angle of shrapnel shrapnel can be made to be sent out in annular aperture Raw deformation, and then elastic force is produced, shrapnel is produced stress stimulation to femur sclerotin all the time, promote femoral bone growth.

More specifically, as depicted in figs. 1 and 2, the matrix 21 of the present embodiment includes 8 shrapnels, and 8 shrapnels are divided into 4 groups, often Group includes 1 movable spring slice 211 and 1 fixation spring tab 212.Fixed structure 20 further includes 23,4 fixation spring tabs 212 of pedestal First end is fixedly connected in condyle of femur main body 10 by pedestal 23, the second end of fixation spring tab 212 and adjacent movable spring slice 211 first end is connected, and the second end of movable spring slice 211 extends for free end and towards condyle of femur main body 10, and fixed tooth 22 is set Put on the outer surface of movable spring slice 211.

As shown in figure 3, the inner surface that set bores is cylinder, outer surface is the conical surface, and the cone angle B of the conical surface is preferably 0 °~3 °, when When fixation spring tab 212 is stretched into hole, fixed tooth 22 contacts with hole inner wall and produces interaction force, makes fixation spring tab 212 First end is close to axis.At this time, as shown in figure 4, the first end of movable spring slice 211 is synchronous with the second end of fixation spring tab 212 Moved by axial ray, movable spring slice 211 has the trend for keeping straight under natural resiliency effect, makes the second of movable spring slice 211 Hold to away from axis direction and tilt, increase the active force between fixed tooth 22 and femur sclerotin, further make fixed tooth 22 more Deepen into femur sclerotin, that is, to improve the structural strength between fixed structure 20 and femur sclerotin, and promote fixed structure 20 To the facilitation effect of femur sclerotin.

Specifically, as shown in figures 1 and 3, it is equal with the internal diameter D02 of annular base 21 to cover the internal diameter D12 of brill, set bores end Outer diameter D 11 than annular base 21 01 small 0.5mm~2mm of outer diameter D.

In other embodiment not shown in figure, fixation spring tab can also be set directly in condyle of femur main body.Shrapnel It can also be the fixation spring tab that first end is fixedly connected in condyle of femur main body, second end is free end.

Preferably, the movable spring slice 211 of the present embodiment and fixation spring tab 212 are staggered, so that the fixation of the present embodiment 20 uniform force of structure.In other embodiment not shown in figure, two can also be set in the both sides of a fixation spring tab Movable spring slice.

Further, as shown in Figure 1, the fixation tooth 22 of the present embodiment is multiple, axis of multiple fixed teeth 22 along matrix 21 To setting, with the contact area between the fixed tooth of increase and femur sclerotin.In addition, the height of multiple fixed teeth 22 is from matrix 21 The setting that the root of end to matrix 21 gradually increases, makes fixed stress between tooth 22 and femur sclerotin gradually increase, into one Step improves and above-mentioned prevent condyle of femur from coming off and stimulate the effect of bone growth.

Further, the first end of fixation tooth 22 from the movable spring slice 211 in movable spring slice 211 gradually rises to second end Ground is set, and is made under natural conditions, and the outer edge institute of fixed tooth 22 also has certain taper into curved surface.Preferably, as shown in Figure 1, The scope of outer edge institute into the cone angle A of curved surface of fixed tooth 22 are 0 °~7 °.When movable spring slice is flared out, close to activity bullet The fixation tooth of the second end of piece 211 can extend into that sclerotin is more, and action effect is more preferable.When the curved surface cone of the fixation tooth of movable spring slice Angle with set brill formed conical surface cone angle gap it is bigger when, i.e., when A-B are bigger, the movable spring slice of opening can be produced with the inner wall of annular aperture Raw stronger effect, improves implantation effect.

As shown in Figures 1 to 4, it is respectively provided with gap between 8 shrapnels of the present embodiment, the gap between two neighboring shrapnel Size is between 0.2 millimeter to 1 millimeter.Gap makes movable spring slice and fixation spring tab not have an impact between each other, and then activity The second end of shrapnel can open completely, to improve the insertion effect of the fixation tooth 22 in movable spring slice, further improve fixation Structural strength and fixed effect between structure 20 and femur sclerotin.

Further, as shown in Figure 1, being additionally provided with through hole 24 on the matrix 21 of the present embodiment, through hole 24 is more to be multiple A through hole 24 is along the axial arranged of matrix 21.Through hole 24 enables bone in growth through through hole 24 and shrapnel is wrapped in bone In matter, the structural stability between femur sclerotin and fixed structure 20 is further improved.As shown in Figure 1, through hole can be threaded through In fixed tooth, it can also be arranged on around fixed tooth.The shape of through hole can be regular circular, or irregular component Shape.

Further, as depicted in figs. 1 and 2, the condyle of femur main body 10 of the present embodiment includes multiple towards the surface of femur Plane at an angle to each other.Section is done on the femur of subject patient during art is applied and by straight section and condyle of femur main body 10 plane is engaged, and improves the stability between condyle of femur main body 10 and femur.

Specifically, above-mentioned multiple planes at an angle to each other include the first osteotomy surface, and the direction of the line of force axis of femur is closed from knee Late-segmental collapse is directed toward at section center, as shown in Figure 1, line of force axis of first osteotomy surface perpendicular to femur, i.e. α=90 °.Condyle of femur master Angle β between the axis of body 10 and the first osteotomy surface meets：70°≤β≤80°.Matrix 21 is set to can extend into enough depth, And then fixed structure 20 is set to be more difficult to separate with femur sclerotin and come off from femur.

Further, as depicted in figs. 1 and 2, the angle and structural stability between guarantee condyle of femur and femur, this reality The second osteotomy surface for applying example is provided with another fixed structure, which can be identical with above-mentioned 20 structure of fixed structure.

Further, the condyle of femur of the present embodiment is additionally provided with biological coating, example on the contact surface contacted with sclerotin Such as said base 23, the first osteotomy surface, the second osteotomy surface contact surface.

The condyle of femur of the present embodiment can also be used cooperatively with tibial plateau, and tibial plateau is implanted to shin bone close to femur One end, substitutes the cooperation between femur and shin bone by the cooperation between condyle of femur and tibial plateau, enables the patient to make day Normal behavior act.

Present invention also provides a kind of knee-joint prosthesis, is included according to the embodiment of this knee-joint prosthesis (not shown) Condyle of femur, condyle of femur are the condyle of femur with above-mentioned all or part of technical characteristic.The knee-joint prosthesis of the present embodiment can be with The femoral stabilization of subject patient connects, is not easily to fall off.

It can be seen from the above description that the above embodiments of the present invention realize following technique effect：

Set on the fixed structure of condyle of femur and can extend into fixation tooth in the sclerotin of femur, increase fixed structure with Contact area between femur sclerotin, and by between original fixed structure and sclerotin it is Nian Jie cooperation or interference fit list One fit system replaces with interference fit and the complicated fit system contacted, and reduction fixed structure is separated with sclerotin, femur Condyle falls back the possibility loosened.Especially for the patient of osteoporosis, in implantation, fixation tooth can act on sclerotin, make sclerotin Density increase, can contact after completing to be implanted into sclerotin, reduce the possibility that fixed structure loosens.

In the description of the present application, it is to be understood that the noun of locality such as " forward and backward, upper and lower, left and right ", " laterally, vertical, Vertically, orientation or position relationship indicated by level " and " top, bottom " etc. are normally based on orientation or position shown in the drawings and close System, is for only for ease of description the application and simplifies description, in the case where not making conversely explanation, these nouns of locality do not indicate that There must be specific orientation with the device or element for implying meaning or with specific azimuth configuration and operation, therefore cannot manage Solve as the limitation to the application protection domain；The noun of locality " inside and outside " refers to relative to inside and outside each component profile in itself.

For the ease of description, spatially relative term can be used herein, as " ... on ", " ... top ", " ... upper surface ", " above " etc., for describing such as a device shown in the figure or feature and other devices or spy The spatial relation of sign.It should be appreciated that spatially relative term is intended to comprising the orientation except device described in figure Outside different azimuth in use or operation.For example, if the device in attached drawing is squeezed, it is described as " in other devices It will be positioned as " under other devices or construction after the device of part or construction top " or " on other devices or construction " Side " or " under other devices or construction ".Thus, exemplary term " ... top " can include " ... top " and " in ... lower section " two kinds of orientation.The device can also other different modes positioning (being rotated by 90 ° or in other orientation), and And respective explanations are made to the opposite description in space used herein above.

Furthermore, it is necessary to explanation, limits parts, it is only for be easy to using the word such as " first ", " second " Corresponding parts to be distinguished, do not have Stated otherwise such as, above-mentioned word does not have particular meaning, therefore it is not intended that to this Apply for the limitation of protection domain.

The foregoing is only a preferred embodiment of the present invention, is not intended to limit the invention, for the skill of this area For art personnel, the invention may be variously modified and varied.Within the spirit and principles of the invention, that is made any repaiies Change, equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.

Claims

1. a kind of condyle of femur, is arranged between shin bone and femur, it is characterised in that the condyle of femur includes：

Condyle of femur main body (10), is arranged on the femur close to one end of the shin bone；

Fixed structure (20), is arranged on the side that the condyle of femur main body (10) is in contact with the femur, by the femur Condyle main body (10) is fixedly connected on the femur, and the fixed structure (20) includes matrix (21) and is arranged on described matrix (21) the fixation tooth (22) on, the fixed tooth (22) can extend into the sclerotin of the femur.

2. condyle of femur according to claim 1, it is characterised in that described matrix (21) is cylindrical in shape, the described matrix of tubular (21) spaced multiple shrapnels are included, the fixed tooth (22) is arranged on the shrapnel of part.

3. condyle of femur according to claim 2, it is characterised in that the multiple shrapnel includes multiple movable spring slices (211) With multiple fixation spring tabs (212), the first end of the fixation spring tab (212) is fixedly connected on the condyle of femur main body (10), The second end of the fixation spring tab (212) is connected with the first end of the adjacent movable spring slice (211), the movable spring slice (211) second end extends for free end and towards the condyle of femur main body (10), and the fixed tooth (22) is arranged on the work On spring plate (211).

4. condyle of femur according to claim 3, it is characterised in that multiple movable spring slices (211) and multiple described solid Determine shrapnel (212) to be staggered.

5. condyle of femur according to claim 3, it is characterised in that the fixed structure (20) further includes pedestal (23), more A fixation spring tab (212) is arranged on the condyle of femur main body (10) by the pedestal (23).

6. condyle of femur according to claim 1, it is characterised in that the fixed tooth (22) is multiple, multiple fixations Tooth (22) is set along the axial direction of described matrix (21), the height of multiple fixed teeth (22) from the end of described matrix (21) to The setting that the root of described matrix (21) gradually increases.

7. condyle of femur according to claim 1, it is characterised in that through hole (24) is provided with described matrix (21), it is described Through hole (24) is multiple, and multiple through holes (24) are along the axial arranged of described matrix (21).

8. condyle of femur according to claim 1, it is characterised in that table of the condyle of femur main body (10) towards the femur Face includes multiple planes at an angle to each other.

9. condyle of femur according to claim 8, it is characterised in that multiple planes at an angle to each other include the first osteotomy Face, first osteotomy surface perpendicular to the femur line of force axis, the axis of the condyle of femur main body (10) with described first section Angle β between bone face meets：70°≤β≤80°.

10. a kind of knee-joint prosthesis, including condyle of femur, it is characterised in that the condyle of femur is any one of claim 1 to 9 The condyle of femur.