CN207605041U - A kind of rotation clamping type Total knee arthroplasty tibia support and tibial insert assembling structure - Google Patents
A kind of rotation clamping type Total knee arthroplasty tibia support and tibial insert assembling structure Download PDFInfo
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- CN207605041U CN207605041U CN201720558052.XU CN201720558052U CN207605041U CN 207605041 U CN207605041 U CN 207605041U CN 201720558052 U CN201720558052 U CN 201720558052U CN 207605041 U CN207605041 U CN 207605041U
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- tibia support
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Abstract
The utility model discloses a kind of rotation clamping type Total knee arthroplasty tibia support and tibial insert assembling structure, structure includes：It is equipped with one in the upper surface of tibia support and fixes circular groove and multiple arc grooves with locking mechanism, the fixed circular groove is arranged in the center of tibia support upper surface, and a positioning bone column is equipped in the lower surface of tibia support；It is equipped with a fixed cylinder and the multiple and matched circular arc body of arc groove in the lower surface of tibial insert；When assembly, the fixation circular groove that fixed cylinder on tibial insert is aligned to tibia support first presses downward to, tibia support is set to be bonded completely with tibial insert, then tibial insert is twisted, circular arc body is set to be rotated in arc groove, boundary is completely superposed, and the locking mechanism on arc groove and circular arc body comes into force, and tibial insert is completely fixed with tibia support.The utility model can guarantee the stability of tibia support and tibial insert assembly, improves the quality of total knee replacement, Total knee arthroplasty tibia support and tibial insert device can quickly be made for personalized patient.
Description
Technical field
The utility model is related to perform the operation to use tibia support and tibial insert, more specifically to a kind of personalized revotating card
Compact form Total knee arthroplasty tibia support and tibial insert assembling structure.
Background technology
Total knee replacement operation is all quickly developing every year in worldwide, and as treatment late period bone
The most effectual way of the diseases such as arthritis, rheumatoid arthritis.However the prosthetic loosening of postoperative appearance, stretch bend and bear a heavy burden after go out
The complication such as existing deformity, pain also result in the attention of numerous orthopedists.
And due to the otherness of individual, the tibia support of volume production and the coverage rate in deep section are insufficient, tibial insert and shin
The assembling of bone support is bad, can all influence the quality of operation.
Have benefited from the fast development of computer and digital technology, Digital Three-Dimensional, which is rebuild, medically to be applied more and more extensively
General, customizing small lot manufacture, above advantage makes it have wide practical use in personalized medicine to 3D printing technique.It is domestic
Multidigit scholar rebuilds digitlization and 3D printing technique is applied to field of orthopaedics, but still lacks for personalized tibia support
With effective assembling structure of tibial insert.
Utility model content
The main purpose of the utility model is to overcome tibia supports in the prior art and tibial insert not to be suitable for personalization
The problem of patient's complete knee joint is performed the operation, provide a kind of stabilizability can it is good, make easy rotation clamping type Total knee arthroplasty shin
Bone support and tibial insert assembling structure.
In order to achieve the above object, the utility model uses following technical scheme：
The utility model provides a kind of rotation clamping type Total knee arthroplasty tibia support and tibial insert assembling structure, in shin bone
The upper surface of support is equipped with one and fixes circular groove and multiple arc grooves with locking mechanism, and the fixed circular groove is arranged on tibia support
The center on surface is equipped with a positioning bone column in the lower surface of tibia support；It is equipped with one in the lower surface of tibial insert and fixes and justify
Column and the multiple and matched circular arc body of arc groove；When assembly, the fixed cylinder on tibial insert is directed at consolidating for tibia support first
Determine circular groove to press downward to, so that tibia support is bonded completely with tibial insert, then twist tibial insert, make circular arc body in arc groove
Rotation, and boundary is completely superposed, and the locking mechanism on arc groove and circular arc body comes into force at this time, and tibial insert is complete with tibia support
It is fixed.
As a preferred technical solution, the arc groove be three, one of arc groove be arranged tibia support just before
Side, other two arc groove are arranged in the left and right sides of tibia support；The circular arc body is three, and one of circular arc body setting exists
The left and right sides in tibial insert lower surface is arranged in the front of tibial insert lower surface, other two circular arc body.
The fixed circular groove center of circle is located at same vertical direction with the positioning bone column center of circle as a preferred technical solution, and
The depth of fixed circular groove is identical as positioning bone pillar height degree, and fixed circular groove radius is identical as positioning bone column radius；
The depth of the arc groove is identical as the fixed depth of circular groove；The depth of the arc groove also with the height of circular arc body
It is identical, and the arc groove is located at same straight line with circular arc body starting point, circular arc body angle is no more than the half of the circular arc angle of the v-groove.
Show to be equipped with for positioning and fixed guide post under the tibia support as a preferred technical solution,；The guide post
Including big two small three cylinders, big cylinder has certain pattern draft, is located at tibia support lower surface center, small cylinder
It is arranged on big cylinder or so, three is connected by floor.
Arc groove as a preferred technical solution, on the tibia support is evenly distributed centered on fixing circular groove, circular arc
The arc length of slot is identical with arc chord angle.
The utility model compared with prior art, has the following advantages that and advantageous effect：
1, the utility model provides a kind of rotation clamping type Total knee arthroplasty tibia support of customization and tibial insert assembles
Structure can fast, easily improve the quality of the stability and complete knee joint operation of total knee prostheses.
2, the Total knee arthroplasty tibia support and tibial insert made of the rotation clamping type assembling structure of the utility model fills
It sets, the individual demand of different patients can be directed to, improved the service life of prosthese, realize " individual's customization " operation.
3, the utility model can shorten surgical learning curve, and making young doctor also can utilize using this practicality newly
The Total knee arthroplasty tibia support that the rotation clamping type assembling structure that type provides makes quickly masters a skill with tibial insert device, implements
Operation.
Description of the drawings
Fig. 1 is the trimetric drawing using Total knee arthroplasty tibia support and tibial insert after rotation clamping type Standard；
Fig. 2 (a) and 2 (b) are the assembling schematic diagram for rotating clamping type Total knee arthroplasty tibia support and tibial insert assembling structure；
Fig. 3 (a), Fig. 3 (b), Fig. 3 (c) are respectively the complete of rotation clamping type assembling structure making according to the present utility model
Front view, side view and the vertical view of knee replacement shin bone rest device；
Fig. 4 (a), Fig. 4 (b), Fig. 4 (c) are respectively the complete of rotation clamping type assembling structure making according to the present utility model
Front view, side view and the upward view of knee replacement tibial insert device；
Fig. 5 is to make Total knee arthroplasty tibia support according to the rotation clamping type assembling structure of the utility model to fill with tibial insert
Set flow chart.
Drawing reference numeral explanation：1, fixed cylinder；2, circular arc body；3, fixed circular groove；4, arc groove；5, bone column is positioned.
Specific implementation mode
The present invention will be further described in detail with reference to the embodiments and the accompanying drawings, but the implementation of the utility model
Mode is without being limited thereto.
Embodiment
As shown in Fig. 1, Fig. 3 (a)-Fig. 3 (c) and Fig. 4 (a)-Fig. 4 (c), the present embodiment rotates clamping type Total knee arthroplasty shin bone
Support with tibial insert assembling structure, have be：
1), tibial insert lower surface (i.e. with tibia support contact surface), there are one fixed cylinders 1；
2), tibial insert lower surface (i.e. with tibia support contact surface), there are three the circular arc body 2 with locking mechanism, three
A circular arc body 2 is located at immediately ahead of tibial insert and two directions of left and right；
3), tibia support upper surface (i.e. with tibial insert contact surface), there are one fixed circular grooves 3；
4), tibia support upper surface (i.e. with tibial insert contact surface), there are three the arc grooves 4 with locking mechanism, should
Three arc grooves 4 are located at immediately ahead of tibia support and two directions of left and right；
5), in shin bone tibia support lower surface, there are one positioning bone columns 5.
As shown in Fig. 2 (a), Fig. 2 (b), when assembly, operated according to following two steps：
The first step：The fixation circular groove 3 that fixed cylinder 1 on tibial insert is aligned to tibia support presses downward to, and makes tibia support
It is bonded completely with tibial insert,
Second：Tibial insert is twisted, makes the rotation in arc groove 4 of circular arc body 2, and boundary is completely superposed, and is justified at this time
Locking mechanism on arc slot 4 and circular arc body 2 comes into force, and tibial insert is completely fixed with tibia support.
Wherein, positioning bone column 5 is inserted into assembly in patient's shin bone.
In the present embodiment, 3 center of circle of fixed circular groove is located at same vertical direction with 1 center of circle of positioning bone column, in assembly
Play auxiliary spacer positioning and prevents gasket horizontal direction from moving.
The arc groove 4 is located at front and the left and right both direction of tibia support, and gasket is made to match rear nothing in rotating dress
Method improves the stability of tibia support and tibial insert assembly in moving in rotation.
In order to fixed more firm, fixed cylinder 1 need to fix 3 perfection of circular groove with tibia support and be bonded, and same circular arc body 2 is locked
Crash structure also needs to be bonded with locking mechanism perfection on arc groove 4.Therefore it is provided with locking mechanism on circular arc body and arc groove, it locks
Crash structure matches mutually has the function of preventing tibial insert movement dislocation.
3 center of circle of fixed circular groove and 5 center of circle of positioning bone column are located at same vertical direction, and the depth of fixed circular groove 3 and
It is identical to position 5 height of bone column, it is identical as positioning 5 radius of bone column to fix 3 radius of circular groove；
The depth of the arc groove 4 is identical as the depth of fixed circular groove 1；The depth of the arc groove 4 also with circular arc body 2
It is highly identical, and the arc groove is located at same straight line with circular arc body starting point, circular arc body angle is no more than the one of the circular arc angle of the v-groove
Half.
As shown in figure 5, for according to the utility model rotation clamping type assembling structure make Total knee arthroplasty tibia support with
The flow chart of tibial insert device.The Total knee arthroplasty shin bone made of rotation clamping type assembling structure provided by the utility model
The flow chart that Fig. 5 may be used with tibial insert device for support obtains.In Fig. 5, rotation clamping type assembly provided by the utility model
The Total knee arthroplasty tibia support of structure fabrication includes the following steps with tibial insert device：
S1, the shin bone model that three-dimensional digital is established based on the kneed Tibial osteotomy medical image data of patient.
In particular it is required that obtaining patient's knee joint CT or MRI tomoscan image in advance.Then, by dissecting engineering weight
It builds software and imports CT the or MRI tomoscan images, there is according to bone from soft tissue the feature of different gray values, carry out image point
It cuts and repairs, calculate the shin bone model for obtaining three-dimensional digital, and store spare.Dissection engineering employed in the utility model
Reconstruction software can be Mimics 17.0 or other same type softwares.In a preferred embodiment of the utility model, base
The step is realized in Mimics 17.0, therefore in advance by patient's knee joint CT or MRI tomoscan image of acquisition with DICOM
Format preserves, and is then conducted into medical image software Mimics 17.0, and three-dimensional digital is obtained after carrying out three-dimensional reconstruction
Shin bone model is stored spare with STL formats.
S2, model is imported into design software, Tibial osteotomy face is set as reference plane, osteotomy is obtained using section curve function
Cross section profile data, by data parameterization so as into edlin.Design software employed in the utility model be UG_NX10 or
Other same type softwares of person.
Specifically, step S2 can be realized further by following steps：
S21, after importing the shin bone model preserved with STL formats by design software UG_NX10, mobile object work(is used
Can, so that osteotomy section is overlapped with reference plane, osteotomy section is set as reference plane.
S22, using section curve function, obtain the section curve of osteotomy section, it is bent that section curve is fitted to parametrization
Line, to carry out the editor of next step.
S3, according to cross-section data, the assembling structure at design tibia support position.Specifically, step S3 can further lead to
Cross following steps realization：
S31, by the curvilinear stretch of parametrization at tibia support original shape, be highly 4-6mm；
S32, shin bone section lumen centers are found into sketch drafting function using osteotomy section as reference plane, draws radius
For the circle of 3-5mm, it is drawn into cylinder, circular groove, depth 1.8-2mm are formed in tibia support upper surface；
S33, the equally face on the basis of osteotomy section, circular groove center be the center of circle, in sketch, respectively in front of tibia support and
Roundlet arc radius is drawn out away from boundary 4.5-5mm in two directions of left and right, and angle of the large circular arc radius away from boundary 1.5-2mm is 43-45
The bicircular arcs in three directions are stretched adult by two sections of circular arcs of degree, and circular arc groove depth and circular groove phase are formed in tibia support upper surface
Together；
S34, the equally face on the basis of osteotomy section, circular groove center be the center of circle, in sketch, equally in front of tibia support and
It is identical that left and right directions draws out starting point, and roundlet arc radius is 3-3.5mm away from boundary, and maximum radius is identical as isocentric circular arc slot, angle
Degree is the bicircular arcs of 21-22 degree, is drawn into the body that height is circular groove depth half, is finally carried out to the lower surface of body different twice
The draft in direction makes intermediate projections, and both sides recess, draft degree is 1-3 degree, finally merges body with tibia support upper surface.
S4, tibia support bottom Design assistant positioning and fixed guide post；The guide post includes big two small three cylinders
Body forms, and big cylinder has certain pattern draft, is located at bone support lower surface center, it is left that small cylinder is arranged on big cylinder
The right side, three are connected by floor.Specifically, step S4 can be realized further by following steps：
S41, the face on the basis of tibia support lower surface, circular groove center are the center of circle, draw the circle that radius is 5-8mm, stretch adult,
Height is 25-30mm, carries out draft, and gradient is 3-4 degree, is merged with tibia support；
Face on the basis of S42, same following surface, in the left and right away from big cylinder 20-25mm, drawing a radius respectively is
The roundlet of 2.5-3mm stretches adult, is highly 6-8mm, big small cylinder is connected with floor, is merged with tibia support.
S5, corresponding tibia support design corresponding assembling structure in tibial insert.Specifically, step S5 can be further
It is realized by following steps：
S51, by the curvilinear stretch of parametrization at tibial insert original shape, be highly 6-8mm；
S52, using gasket lower surface as reference plane, into sketch drafting function, using the circular groove center of circle as the center of circle, draw radius be
Identical circle is drawn into cylinder, highly identical as circular groove depth, merges with gasket lower surface；
S53, the equally face on the basis of gasket lower surface, circular groove center is the center of circle, in sketch, respectively in front of tibia support
Draw out that starting point is identical as arc groove, the big 0.1- of small arc-shaped radius ratio tibia support arc groove least radius with two directions of left and right
Two sections of circular arcs that 0.2mm, large circular arc radius are smaller 0.1-0.2mm than tibia support arc groove maximum radius, angle is 20-21 degree, will
The bicircular arcs in three directions stretch adult, highly identical as circular groove depth, equally merge with gasket lower surface；
S54, the equally face on the basis of gasket lower surface, circular groove center is the center of circle, in sketch, equally in front of tibia support
Draw out starting point with left and right directions identical, the small arc-shaped radius ratio locking mechanism small 0.1-0.2mm of roundlet arc radius, orthodrome half
Diameter is identical as circular arc body large radius.Angle is the bicircular arcs of 20-21 degree, and it is identical as tibia support locking mechanism height to be drawn into height
Body, the draft of different directions twice is finally carried out to the lower surface of body, makes intermediate projections, both sides recess, draft degree and shin bone
It asks locking mechanism identical, finally subtracts each other body and tibia support upper surface.
S6, according to osteotomy data, design tibial insert upper end (with prosthese contact portion).
S7, the rotation clamping type Total knee arthroplasty tibia support that entity is produced using rapid shaping technique and tibial insert are assembled
Constructional device.For example, the metal materials such as plastics or selective laser fusing printing stainless steel can be sterilized using the sintering printing of light constituency
Material.
Above-described embodiment is the preferable embodiment of the utility model, but the embodiment of the utility model is not by above-mentioned
The limitation of embodiment, under other any Spirit Essences and principle without departing from the utility model made by change, modify, replace
In generation, simplifies combination, should be equivalent substitute mode, is included within the scope of protection of the utility model.
Claims (5)
1. a kind of rotation clamping type Total knee arthroplasty tibia support and tibial insert assembling structure, which is characterized in that in the upper of tibia support
Surface is equipped with one and fixes circular groove (3) and multiple arc grooves (4) with locking mechanism, and the fixed circular groove (3) is arranged in shin bone
The center for holding in the palm upper surface is equipped with a positioning bone column (5) in the lower surface of tibia support；It is equipped with one in the lower surface of tibial insert
Fixed cylinder (1) and the multiple and matched circular arc body of arc groove (2)；When assembly, first by the fixed cylinder (1) on tibial insert
The fixation circular groove (3) of alignment tibia support presses downward to, and so that tibia support is bonded completely with tibial insert, then twists tibial insert,
Make circular arc body (2) rotation in the arc groove (4), and boundary is completely superposed, at this time the lock on arc groove (4) and circular arc body (2)
Dead mechanism in force, tibial insert are completely fixed with tibia support.
2. rotation clamping type Total knee arthroplasty tibia support and tibial insert assembling structure according to claim 1, which is characterized in that
The arc groove (4) is three, and one of arc groove is arranged in the front of tibia support, other two arc groove is arranged in shin
The left and right sides of bone support；The circular arc body (2) be three, one of circular arc body be arranged tibial insert lower surface just before
The left and right sides in tibial insert lower surface is arranged in side, other two circular arc body.
3. rotation clamping type Total knee arthroplasty tibia support and tibial insert assembling structure according to claim 1, which is characterized in that
Fixed circular groove (3) center of circle is located at same vertical direction with positioning bone column (5) center of circle, and fixes the depth of circular groove (3) and determine
Position bone column (5) height is identical, and fixed circular groove (3) radius is identical as positioning bone column (5) radius；
The depth of the arc groove (4) is identical as the fixed depth of circular groove (3)；The depth of the arc groove (4) also with circular arc body
(2) height is identical, and the arc groove (4) is located at same straight line with circular arc body (2) starting point, and circular arc body angle is no more than circular arc
The half of the angle of the v-groove.
4. rotation clamping type Total knee arthroplasty tibia support and tibial insert assembling structure according to claim 1, which is characterized in that
Show to be equipped with for positioning and fixed guide post under the tibia support；The guide post includes big two small three cylinders, great circle
Cylinder has certain pattern draft, is located at tibia support lower surface center, and small cylinder is arranged on big cylinder or so, and three passes through
Floor connects.
5. rotation clamping type Total knee arthroplasty tibia support and tibial insert assembling structure according to claim 1, which is characterized in that
Arc groove (4) on the tibia support is evenly distributed centered on fixing circular groove (3), and the arc length of arc groove is identical with arc chord angle.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720558052.XU CN207605041U (en) | 2017-05-19 | 2017-05-19 | A kind of rotation clamping type Total knee arthroplasty tibia support and tibial insert assembling structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720558052.XU CN207605041U (en) | 2017-05-19 | 2017-05-19 | A kind of rotation clamping type Total knee arthroplasty tibia support and tibial insert assembling structure |
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| Publication Number | Publication Date |
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| CN207605041U true CN207605041U (en) | 2018-07-13 |
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ID=62792396
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| CN201720558052.XU Active CN207605041U (en) | 2017-05-19 | 2017-05-19 | A kind of rotation clamping type Total knee arthroplasty tibia support and tibial insert assembling structure |
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| CN (1) | CN207605041U (en) |
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2017
- 2017-05-19 CN CN201720558052.XU patent/CN207605041U/en active Active
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