CN204890149U - Locking type kneecap internal fixing device - Google Patents
Locking type kneecap internal fixing device Download PDFInfo
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- CN204890149U CN204890149U CN201520628397.9U CN201520628397U CN204890149U CN 204890149 U CN204890149 U CN 204890149U CN 201520628397 U CN201520628397 U CN 201520628397U CN 204890149 U CN204890149 U CN 204890149U
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Abstract
The utility model provides a locking type kneecap internal fixing device, includes first fixed plate and second fixed plate, and first fixed plate lower extreme is provided with two piece at least fixed strips, and first fixed plate upper end and second fixed plate lower extreme are connected, and second fixed plate upper end is provided with two at least fixed strips, is provided with first screw on the fixed strip, fixed strip and first fixed plate and the design of second fixed plate integrated into one piece. The utility model discloses operation technique is convenient, no matter is that lower extreme hook plate (or tacking) is very convenient when putting into, and is fixed firm reliable. Upper steel sheet if with the kneecap on utmost point laminating, the screw in locking screw can, the middle body forces down that to carry out the lock solid fixed adding.
Description
Technical field
This utility model relates to a kind of locking patella inner fixer, belongs to bone surgery set articles for use field.
Background technology
Patella is sesamoid bone maximum in human body, is positioned at knee joint front portion subcutaneous, forms complicated patellofemoral joint, have 7 articular surfaces with condyle of femur.Patella or knee joint stretch the fulcrum transmitting quadriceps strength when bending movable, very easily sustain damage.Patella fracture line relates to articular surface mostly, belongs to intra-articular fracture.Therefore, the treatment of Patella fracture must defer to intra-articular fracture treatment principle: (1) articular surface anatomical reduction, recovers articular surface integrity and curvature, and (2) are fixing wants really firmly.The biomechanics pattern of patella has two aspects, first will bear and stretch under the state of going down on one's knees from quadriceps femoris and patellar ligament its axial tractive stress.Secondly, bear be stretch go down on one's knees state time patella to the compressive stress of femur condyle, this compressive stress is not act on all patellofemoral joint faces simultaneously, and the articular surface that knee joint contacts at different flexing position patellofemoral joints is different.Under knee sprung state, patella is when bestowing pressure effect to femur, femur is also to producing retroaction folding shearing action in the middle part of patella.Very easily cause fracturing in the middle part of patella.At present, the surgical menopause mode of Patella fracture has two large classes: (1), to add the tension band fixation mode that steel wire (steel cable) forms with Kirschner wire (or hollow screw); (2), patella fixing device fixed form.The former is accepted extensively by orthopaedics worker to Patella fracture fixation, is regarded as Patella fracture and fixes classical fixed form.This art formula is except making bone block and mutually pressurizeing, and its Kirschner wire (or screw) also has Stabilization to bone block.Well can limit the mutual movement of bone interblock, but pressurization is little compared with stiff end.The latter's patella claw holder is, by its claw-like briar tooth, patella is resisted the vertical face tractive stress of patella to central part extruding in pole up and down.But the rotation stress that cannot effectively control between sclerite and shear stress, so, little compared with tension band to the Stabilization of Patella fracture.The fixation that the anti-rotation that how simultaneously could solve tension band is sheared and patella claw grasp fixation, eliminating patella fixing device to the shortcoming of patella external shape fits ability, is the medical problem being badly in need of at present solving.
Traditional patella fixing device, structure is lower two teeth, the hook dentalation of upper three teeth, hooks patella pole up and down respectively, and lower pole briar tooth is comparatively simple when mounted, but upper three teeth need cleavage to divide quadriceps femoris tendon just can insert when mounted, patella upper limb is hooked in upper tooth effect, higher for its shape need like this, must close to patella profile time, effectively could contact with patella, certain fixation (guaranteeing to contact with patella) after installation, could be produced.But most of patella body profile has different, in a lot of situation, have one to two tooth really not contact with patella in upper three teeth, tooth tip portion is in vacant state, and it grasps effect and greatly reduces, and stressed effect is uneven.It is fixing to realize it to the extruding of patella surface effect by tooth to patella effect, very easily causes teeth portion slippage, solid failure.Fracture end is shifted, and articular surface reproduces displacement and occurs step phenomenon.
Utility model content
This utility model is for the problems referred to above, provide: three nail types on (1), lower two teeth, this type cannot fix by row screw for pole fracture under patella, adopt briar tooth to hook and fix down pole to match with the locking screw in three pieces, upper pole, central zone slip pressue device, so just firmly can fix in aggregates by sending down the fishbone block on patella; (2), the lower two nail types of upper three nail, this type is applicable to patella central type fracture, and the two poles of the earth sclerite the greater, can thoroughly be solved the problem by this utility model.
Technical solution of the present utility model:
A kind of locking patella inner fixer, comprise the first fixed plate and the second fixed plate, it is characterized in that: described first fixed plate lower end is provided with at least two fixed strips, first fixed plate upper end is connected with the second fixed plate lower end, second fixed plate upper end is provided with at least two fixed strips, described fixed strip is provided with the first screw, described fixed strip and the first fixed plate and the one-body molded design of the second fixed plate.
As the preferred version of previous step, described first fixed plate lower surface is provided with the first fastening teeth, and the second fixed plate upper surface is provided with the second fastening teeth; Described first fastening teeth and the second fastening teeth cooperatively interact.
As the preferred version of previous step, described first fixed plate and the second fixed plate are provided with the second screw, described first fixed plate is connected by the second screw fastening in screw-in second screw with the second fixed plate.
As the preferred version of previous step, described first fixed plate lower end is provided with two fixed strips, and described second fixed plate upper end is provided with three fixed strips, or, described first fixed plate lower end is provided with three fixed strips, and described second fixed plate upper end is provided with two fixed strips.
As the preferred version of previous step, in described first screw, be provided with the first identical screw.
As the preferred version of previous step, described first fixed plate lower end is provided with two fixed claws, and described second fixed plate upper end is provided with three fixed strips, or, described first fixed plate lower end is provided with three fixed claws, and described second fixed plate upper end is provided with two fixed strips.
As the preferred version of previous step, described first fixed plate lower end is provided with two fixed strips, and described second fixed plate upper end is provided with three fixed claws, or, described first fixed plate lower end is provided with three fixed strips, and described second fixed plate upper end is provided with two fixed claws.
The beneficial effects of the utility model:
1, operation technique is convenient, and no matter be that lower end hook plate (or nail-plate) is very convenient when inserting, fixation is reliable.As long as upper steel plate is fitted with SPP, screw in lock screw, middle body carries out locking under elevated pressure to be fixed.2, Biomechanical: because upper and lower two ends are all by locking fixation, effect strength can be made to pass to each position of fracture, and make fracture end produce pressure effect, pinning is inserted in patella sclerotin, fracture end displacement probability reduces, and effect is similar to inner fixed support.3, steel plate structure is positioned at patella surface, and fix and insert by screw, do not need otch stock market trend prediction, therefore otch does not need excessive, wound is little.4, fixation has Kirschner wire (screw) needles combined with tension band and fixes all advantages fixing with traditional patella claw, and removes their all shortcomings.
Accompanying drawing explanation
Fig. 1 is this utility model embodiment 1 plan structure schematic diagram.
Fig. 2 is this utility model embodiment 1 side-looking structural representation.
Fig. 3 is the main TV structure schematic diagram of this utility model embodiment 1.
Fig. 4 is the main TV structure schematic diagram of this utility model embodiment 2.
In figure: 1, the first fixed plate, the 2, second fixed plate, 3, fixed strip, the 4, first screw, the 5, second screw, the 6, second screw, 7, fixed claw, the 8, first fastening teeth, the 9, second fastening teeth.
Detailed description of the invention
Following institute drawings attached is only convenient to explain this utility model basic condition, in accompanying drawing by form the component count of preferred embodiment, position, relation and size extension will have illustrated by, belong to industry technical ability at the change read and be correlated with after understanding situation of the present utility model.In addition, in reading and after understanding situation of the present utility model, specific strength, weight, intensity and the accurate dimension of similar requirement and the change of dimension scale is coordinated also to belong to industry technical ability.
Identical or similar assembly is indicated in different figures with identical label; Please understand in addition such as " first ", " second " in literary composition, " the 3rd ", " on ", D score, "front", "rear", " interior ", " outward ", " end ", " portion ", " section ", " width ", " thickness ", " district " etc. and similar term to be only convenient in observer's reference diagram structure and only to describe this utility model for helping.Such as, the first screw of the present utility model, the second screw and the 3rd screw can design same size, and the first bolt, the second bolt and the 3rd bolt also can design same size.
Embodiment 1:
As shown in Figure 1 to Figure 3, a kind of locking patella inner fixer, comprise the first fixed plate 1 and the second fixed plate 2, described first fixed plate lower end is provided with at least two fixed strips 3, first fixed plate upper end is connected with the second fixed plate lower end, second fixed plate upper end is provided with at least two fixed strips, described fixed strip is provided with the first screw, described fixed strip and the first fixed plate and the one-body molded design of the second fixed plate.
As the preferred version of previous step, described first fixed plate lower surface is provided with the first fastening teeth 8, second fixed plate upper surface and is provided with the second fastening teeth 9; Described first fastening teeth and the second fastening teeth cooperatively interact.
As the preferred version of previous step, described first fixed plate and the second fixed plate are provided with the second screw 5, described first fixed plate and the second fixed plate are fastenedly connected by the second screw 6 in screw-in second screw.
As the preferred version of previous step, described first fixed plate lower end is provided with two fixed strips, and described second fixed plate upper end is provided with three fixed strips, or, described first fixed plate lower end is provided with three fixed strips, and described second fixed plate upper end is provided with two fixed strips.
As the preferred version of previous step, in described first screw, be provided with the first identical screw 4.
Embodiment 2:
As shown in Figure 4, described first fixed plate lower end is provided with two fixed claws, and described second fixed plate upper end is provided with three fixed strips, or, described first fixed plate lower end is provided with three fixed claws 7, and described second fixed plate upper end is provided with two fixed strips.
As the preferred version of previous step, described first fixed plate lower end is provided with two fixed strips, and described second fixed plate upper end is provided with three fixed claws, or, described first fixed plate lower end is provided with three fixed strips, and described second fixed plate upper end is provided with two fixed claws.
Concrete installation and using method:
As shown in Figures 1 to 4, operation method step:
1. be its non-pressurized condition after locking the combination of patella plate,
2., by fracture reduction, Patella forceps is temporary fixed,
3. with the first fixed plate first fixing lower pole, then patella plate upper part is close to SPP surface
4. first fix centre first screw on three fixed strips, then fix other two piece of first screw;
5. start intermediary press device, fractures is pressurizeed fixing, screw locking is in aggregates.
Basic instruction of the present utility model is illustrated, and for the people with the usual technical ability in this area, many extensions and change will be aobvious and Yi Zhizhe.This utility model disclosed due to description can be implemented in other particular form not departing from this utility model spirit or general characteristics, and some forms of these particular forms are noted, so the embodiment that description discloses should be considered as illustrating and unrestricted.Scope of the present utility model is defined by appended claim, instead of defined by above-mentioned explanation, and the institute for the impartial meaning and scope that fall into claim changes and will be included within its scope.
To sum up, this utility model produces a desired effect.
Claims (7)
1. a locking patella inner fixer, comprise the first fixed plate and the second fixed plate, it is characterized in that: described first fixed plate lower end is provided with at least two fixed strips, first fixed plate upper end is connected with the second fixed plate lower end, second fixed plate upper end is provided with at least two fixed strips, described fixed strip is provided with the first screw, described fixed strip and the first fixed plate and the one-body molded design of the second fixed plate.
2. a kind of locking patella inner fixer according to claim 1, is characterized in that: described first fixed plate lower surface is provided with the first fastening teeth, and the second fixed plate upper surface is provided with the second fastening teeth; Described first fastening teeth and the second fastening teeth cooperatively interact.
3. a kind of locking patella inner fixer according to claim 2, it is characterized in that: described first fixed plate and the second fixed plate are provided with the second screw, described first fixed plate is connected by the second screw fastening in screw-in second screw with the second fixed plate.
4. a kind of locking patella inner fixer according to claim 3, it is characterized in that: described first fixed plate lower end is provided with two fixed strips, described second fixed plate upper end is provided with three fixed strips, or, described first fixed plate lower end is provided with three fixed strips, and described second fixed plate upper end is provided with two fixed strips.
5. a kind of locking patella inner fixer according to claim 1, is characterized in that: be provided with the first identical screw in described first screw.
6. a kind of locking patella inner fixer according to claim 4, it is characterized in that: described first fixed plate lower end is provided with two fixed claws, described second fixed plate upper end is provided with three fixed strips, or, described first fixed plate lower end is provided with three fixed claws, and described second fixed plate upper end is provided with two fixed strips.
7. a kind of locking patella inner fixer according to claim 6, it is characterized in that: described first fixed plate lower end is provided with two fixed strips, described second fixed plate upper end is provided with three fixed claws, or, described first fixed plate lower end is provided with three fixed strips, and described second fixed plate upper end is provided with two fixed claws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520628397.9U CN204890149U (en) | 2015-08-20 | 2015-08-20 | Locking type kneecap internal fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520628397.9U CN204890149U (en) | 2015-08-20 | 2015-08-20 | Locking type kneecap internal fixing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204890149U true CN204890149U (en) | 2015-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520628397.9U Expired - Fee Related CN204890149U (en) | 2015-08-20 | 2015-08-20 | Locking type kneecap internal fixing device |
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| CN (1) | CN204890149U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105943142A (en) * | 2016-02-03 | 2016-09-21 | 杨春 | Femoral intertrochanteric fracture greater trochanter auxiliary internal fixing device |
| CN106983548A (en) * | 2017-05-12 | 2017-07-28 | 上海市普陀区利群医院 | A kind of fracture of medial malleolus steel plate of tension band |
| CN107157565A (en) * | 2017-05-12 | 2017-09-15 | 上海市普陀区利群医院 | A kind of steel plate of tension band for patellar fracture |
| CN110226961A (en) * | 2019-07-09 | 2019-09-13 | 王海涛 | A kind of patellar fracture reparation kneecap metal plate |
-
2015
- 2015-08-20 CN CN201520628397.9U patent/CN204890149U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105943142A (en) * | 2016-02-03 | 2016-09-21 | 杨春 | Femoral intertrochanteric fracture greater trochanter auxiliary internal fixing device |
| CN106983548A (en) * | 2017-05-12 | 2017-07-28 | 上海市普陀区利群医院 | A kind of fracture of medial malleolus steel plate of tension band |
| CN107157565A (en) * | 2017-05-12 | 2017-09-15 | 上海市普陀区利群医院 | A kind of steel plate of tension band for patellar fracture |
| CN110226961A (en) * | 2019-07-09 | 2019-09-13 | 王海涛 | A kind of patellar fracture reparation kneecap metal plate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151223 Termination date: 20190820 |