CN204394657U - A kind of internal fixation bar of fracturing for fracture around joint and short tubular bone - Google Patents
A kind of internal fixation bar of fracturing for fracture around joint and short tubular bone Download PDFInfo
- Publication number
- CN204394657U CN204394657U CN201420872982.9U CN201420872982U CN204394657U CN 204394657 U CN204394657 U CN 204394657U CN 201420872982 U CN201420872982 U CN 201420872982U CN 204394657 U CN204394657 U CN 204394657U
- Authority
- CN
- China
- Prior art keywords
- internal fixation
- fixation bar
- fracture
- bar
- fracturing
- 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.)
- Expired - Fee Related
Links
Abstract
This utility model relates to technical field of medical instruments, specifically a kind of internal fixation bar of fracturing for fracture around joint and short tubular bone, the head end of internal fixation bar is coniform, and the barred body of internal fixation bar is provided with pawl structure, and pawl structure is stretched out towards the direction of internal fixation bar head end dorsad; The density of described internal fixation bar upper inverted tooth structure is increased progressively to tail end gradually by the head end of internal fixation bar.The beneficial effects of the utility model are, structure is simple, use easy and simple to handle, be convenient to promote; Internal fixation bar carries out effective pressurization to fracture line, and pawl structure is conducive to anti-rotation, extracts and cut out stress, retreating-proof successful, increases fracture end stability, is beneficial to union of fracture; The anury cap of internal fixation bar makes it there is not the defect of chafe, and development bar, development circle and development dot structure can the absorption processes of dynamic monitoring hold-down bars, are beneficial to guiding function and take exercise.
Description
Technical field
This utility model relates to technical field of medical instruments, specifically a kind of for fracture around joint and short tubular bone fracture develop, absorbable internal fixation bar.
Background technology
The clinical inside-fixture being used for the treatment of fracture mainly comprises the screw and club that metal material and absorbable material make at present.
There is following distinct disadvantage in the inside-fixture that metal material is made: 1, electrolysis corrosion in vivo, and produce particles interfere surrounding tissue; 2, rigidity is excessive, produces stress shielding, is unfavorable for union of fracture; 3, stop x-ray, interference NMR (Nuclear Magnetic Resonance)-imaging, is unfavorable for clinical follow; 4, in most cases, need to carry out second operation to be taken out by the inside-fixture in patient body, add the chance that the various complication such as infection occur, bring painful psychology frightened to patient; And for old people, after taking out inside-fixture, easy refracture.
The inside-fixture that absorbable material is made more and more is applied to clinical.The intrinsic initial strength of the internal fixation device made of Biodegradable material can play the effect of conventional steel bonesetting material, As time goes on, the generation of fracture end callus, fracture heals gradually; Biodegradable material is absorbed by tissue gradually simultaneously, and do not accumulate in vivo, almost do not have toxic action, its original space can be substituted by osseous tissue, and patient also need not by the misery of operation again.The inside-fixture that absorbable material is made does not affect NMR (Nuclear Magnetic Resonance)-imaging, and patient can carry out MRI inspection after surgery any time.
Application number is " 03269302.8 ", Authorization Notice No. is " CN 2640427 Y ", name is called that the Chinese utility model patent of " a kind of Absorbable rod internal fixation nail being used for the treatment of fracture of femoral neck " discloses a kind of Absorbable rod internal fixation nail, comprise rivet nut, ailhead and the head of a nail, the surface longitudinal of cylindrical rivet nut has multiple strip bulge, the part strip bulge of rivet nut front portion has the multiple teeth in order to anti-retrogression.The defect of this utility model is: 1, head of a nail diameter is comparatively greater than shaft diameter, therefore cannot be embedded in sclerotin completely, and the head of a nail is embedded in subcutaneous local pain, the inflammation of easily causing; 2, the section of strip bulge is smooth trapezoidal shape, and without retreating-proof function, even if having zigzag pawl or fish scale sample pawl between strip bulge, because angle is less than normal, it is not firm to fix, retreating-proof DeGrain, to understressed between fracture site.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of carrying out effective pressurization to fracture line, be conducive to anti-rotation, extract and cut out stress for fracture around joint and short tubular bone fracture is provided, retreating-proof successful, and fracture end stability can be increased, be beneficial to the developing of union of fracture, absorbable internal fixation bar.
In order to achieve the above object, this utility model provides a kind of internal fixation bar of fracturing for fracture around joint and short tubular bone, the head end of described internal fixation bar is coniform, and the barred body of internal fixation bar is provided with pawl structure, and pawl structure is stretched out towards the direction of internal fixation bar head end dorsad;
The density of described internal fixation bar upper inverted tooth structure is increased progressively to tail end gradually by the head end of internal fixation bar.
Described internal fixation bar is being squeezed in the process of fracture site, due to the existence of pawl structure, exiting of internal fixation bar can be prevented, be conducive to the reset maintaining fracture site, internal fixation bar tail end can be embedded in sclerotin completely simultaneously, solve traditional metallic screw, Kirschner wire, or the fixture with head of a nail structure be embedded in subcutaneous or be exposed to skin outer time the local pain that causes and rigidity is excessive, produce stress shielding and the shortcoming of the refracture caused due to osteoporosis after the defect needing second operation to take out and taking-up internal fixation bar; For child's fracture around joint, inside-fixture often need be fixed by epiphysis, and the metallic screw in the past adopted is comparatively large to epiphyseal injury, affects epiphyseal growth and union of fracture, and absorbable internal fixation bar can reduce its damage, accelerating bone healing.
Preferably, the volume of described pawl structure by the head end of internal fixation bar to tail end by increasing progressively.
Preferably, the angle of inclination that described pawl structure and internal fixation bar barred body are formed is 30 ~ 45 °.
Preferably, described internal fixation bar is provided with development bar at its axle center place.
Preferably, described internal fixation bar is provided with development circle in the barred body outer of its tail end.
Preferably, the end points place of described pawl structure is provided with development point.
Preferably, described pawl structure is conical structure, and its altitude range is 20mm ~ 100mm, and basal diameter scope is 3.0mm ~ 5.5mm.According to size, the position of sclerite, the internal robs for bone fracture of different size can be selected,
Preferably, described internal fixation bar is made up of polylactic acid (PLA), hydroxyapatite (HA) and barium sulfate intermingling material.
Described PLA is that one has excellent biocompatibility and biodegradable polymer, is the class bio-medical material that food and drug administration (FDA) is approved.The weak point of PLA material does not have bone conductibility, and when clinical being used alone, the speed of repairing bone defect is very slow.Especially for larger bony defect, be only difficult to realize complete Bone Defect Repari with polymer, and this kind of material only has the initial mechanical modulus of middle intensity, can not as the bone fracture internal fixation material of bearing position; And its early stage biodegradation rate is very fast, to such an extent as to cannot meet the mechanical property requirements before new bone growth out;
HA is the main inorganic composition of body bone tissue, accounts for more than 70% of body bone tissue.The HA bioceramic of synthetic is similar due to its stuctures and properties and natural HA's, and has good biocompatibility and bone conduction is active, is therefore widely used in the reparation of bone injury; But HA bioceramic organizational project application in exist fragility large, frangible, not easily machine-shaping and degeneration difference etc. defect;
Porous PLA/HA composite PLA and HA compound developed can improve the toughness of material on the one hand, meets the requirement of mechanical strength that bone implants substitution material; On the other hand, neutralize its acid degradation products, delay material premature degradation, improve material synosteosis ability and biocompatibility.Meanwhile, the osteoinductive of HA can provide good bone cell growth environment, and loose structure then provides condition for Growth of Cells, tissue regeneration and vascularization, and PLA/HA composite has good biocompatibility and osteoconductive potential;
Barium sulfate makes the development bar of described internal fixation bar, development circle and development dot structure have can developability.
Described PLA, HA and the absorbable internal fixation material of barium sulfate are more and more applied to clinical, and adopt the internal fixation device that Biodegradable material is made, its intrinsic initial strength can play the effect of conventional steel bonesetting material.As time goes on, the generation of fracture end callus, fracture heals gradually, and biodegradable nail and Absorbable stick are absorbed by tissue gradually simultaneously, do not accumulate in vivo, almost do not have toxic action; Its original space can be substituted by osseous tissue, and patient also need not by the misery of operation again.Its nonmetal characteristic of absorbable material does not affect NMR (Nuclear Magnetic Resonance)-imaging, and patient can carry out MRI inspection the postoperative any time.
The beneficial effects of the utility model are, the internal fixation bar can making different size model according to actual using part is to carry out the fixing of various clinical common fracture around joint and short tubular bone fracture, and structure is simple, use easy and simple to handle, be convenient to promote; Internal fixation bar carries out effective pressurization to fracture line, and pawl structure is conducive to anti-rotation, extracts and cut out stress, retreating-proof successful, increases fracture end stability, is beneficial to union of fracture; The anury cap of internal fixation bar makes it there is not the defect of chafe, development bar, development circle and development dot structure can the absorption processes of dynamic monitoring hold-down bars, are beneficial to guiding function and take exercise, and postoperatively need not take out, alleviate misery and the medical expense of patient, can at any Implementing Hospital.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Wherein:
1-internal fixation bar 2-head end 3-pawl structure
4-development bar 5-development circle
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, this utility model is described further.
Embodiment 1:
A kind of internal fixation bar 1 of fracturing for fracture around joint and short tubular bone as shown in Figure 1, the head end 2 of described internal fixation bar 1 is in coniform, the barred body of internal fixation bar 1 is provided with pawl structure 3, and described pawl structure 3 is stretched out towards the direction of internal fixation bar head end 2 dorsad;
The density of internal fixation bar 1 upper inverted tooth structure 3 is increased progressively gradually by head end 2 to the tail end of internal fixation bar 1.Described pawl structure 3 is conducive to anti-rotation, extracts and cut out stress, retreating-proof successful, increases fracture end stability, is beneficial to union of fracture.
The volume of described pawl structure 3 is increased progressively gradually by head end 2 to the tail end of internal fixation bar 1.
The angle of inclination that described pawl structure 3 and internal fixation bar 1 barred body are formed is 30 ~ 45 °.
Described pawl structure 3 is conical structure, according to size, the position of sclerite, can select the internal robs for bone fracture of different size, and its altitude range is 20mm ~ 100mm, and basal diameter scope is 3.0mm ~ 5.5mm.
During use, row routine operation otch, successively cuts and exposes fracture end, tentative reset satisfied after, select the internal fixation bar 1 that diameter is suitable for pulp cavity.Select corresponding drill bit to pierce pulp cavity, squeeze into thruster specialized, until the tail end of internal fixation bar 1 enters articular cartilage completely, original position layering is sewed up, suitable pressure dressing wound.
Embodiment 2:
All the other are with embodiment 1, and described internal fixation bar 1 is provided with development bar 4 at its axle center place; Described internal fixation bar 1 is provided with development circle 5 in the barred body outer of its tail end; The end points place of described pawl structure 3 is provided with development point.
Described internal fixation bar 1 is made up of polylactic acid (PLA), hydroxyapatite (HA) and barium sulfate intermingling material.Internal fixation bar 1 is absorbable material, takes out without the need to second operation.Barium sulfate makes the development bar of described internal fixation bar, development circle and development dot structure have can developability.
Actual example:
Adopt brachial plexus or nerve block anesthesia of digital root, the flexing palm refers to or interphalangeal joint traction makes the reduction of the fracture, then medullary cavity is penetrated with diameter 0.5mm Kirschner wire from fracture distal joint face, C-arm X-ray machine Fluoroscopy location, positioning needle is no more than proximal joint face, marrow is expanded again with diameter 2mm core drill, perspective monitoring is lower ensures that drill bit is away from proximal joint face 3mm, measure medullary cavity length, internal fixation bar 1 that length deducts 2mm inserts medullary cavity to select equivalent diameter, length comparatively to record, far-end is embedded in 1-2mm under articular surface, and a pin is sewed up or with the direct closure of wound of glue by inserting needle portion.
Below the preferred embodiment that this utility model is created is illustrated, but this utility model is created and is not limited to described embodiment, those of ordinary skill in the art can also make all equivalent modification or replacement under the prerequisite without prejudice to this utility model creative spirit, and these equivalent modifications or replacement are all included in the application's claim limited range.
Claims (7)
1. an internal fixation bar of fracturing for fracture around joint and short tubular bone, the head end (2) of described internal fixation bar (1) is in coniform, it is characterized in that: the barred body of described internal fixation bar (1) is provided with pawl structure (3), pawl structure (3) is stretched out towards the direction of internal fixation bar head end (2) dorsad;
The density of described internal fixation bar (1) upper inverted tooth structure (3) is increased progressively to tail end gradually by the head end (2) of internal fixation bar (1).
2. a kind of internal fixation bar of fracturing for fracture around joint and short tubular bone according to claim 1, is characterized in that: the volume of described pawl structure (3) is increased progressively to tail end gradually by the head end (2) of internal fixation bar (1).
3. a kind of internal fixation bar of fracturing for fracture around joint and short tubular bone according to claim 1, is characterized in that: the angle of inclination that described pawl structure (3) and internal fixation bar (1) barred body are formed is 30 ~ 45 °.
4. a kind of internal fixation bar of fracturing for fracture around joint and short tubular bone according to claim 1, is characterized in that: described internal fixation bar (1) is provided with development bar (4) at its axle center place.
5. a kind of internal fixation bar of fracturing for fracture around joint and short tubular bone according to claim 1, is characterized in that: described internal fixation bar (1) is provided with development circle (5) in the barred body outer of its tail end.
6. a kind of internal fixation bar of fracturing for fracture around joint and short tubular bone according to claim 1, is characterized in that: the end points place of described pawl structure (3) is provided with development point.
7. a kind of internal fixation bar of fracturing for fracture around joint and short tubular bone according to claim 1, it is characterized in that: described pawl structure (3) is conical structure, its altitude range is 20mm ~ 100mm, and basal diameter scope is 3.0mm ~ 5.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420872982.9U CN204394657U (en) | 2014-12-29 | 2014-12-29 | A kind of internal fixation bar of fracturing for fracture around joint and short tubular bone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420872982.9U CN204394657U (en) | 2014-12-29 | 2014-12-29 | A kind of internal fixation bar of fracturing for fracture around joint and short tubular bone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204394657U true CN204394657U (en) | 2015-06-17 |
Family
ID=53418568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420872982.9U Expired - Fee Related CN204394657U (en) | 2014-12-29 | 2014-12-29 | A kind of internal fixation bar of fracturing for fracture around joint and short tubular bone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204394657U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106310388A (en) * | 2016-11-16 | 2017-01-11 | 东华大学 | Developable high-strength high-tenacity biodegradable bone nail and preparation method thereof |
| CN106474570A (en) * | 2016-11-16 | 2017-03-08 | 东华大学 | A kind of biodegradable nail and preparation method thereof that develops of load BMPs |
| CN108236519A (en) * | 2016-12-26 | 2018-07-03 | 重庆润泽医药有限公司 | For the tantalum bar device of operation |
| CN108852488A (en) * | 2018-07-10 | 2018-11-23 | 西安卓恰医疗器械有限公司 | A kind of medical internal fixing peg for fracture and medical fracture setting tool |
-
2014
- 2014-12-29 CN CN201420872982.9U patent/CN204394657U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106310388A (en) * | 2016-11-16 | 2017-01-11 | 东华大学 | Developable high-strength high-tenacity biodegradable bone nail and preparation method thereof |
| CN106474570A (en) * | 2016-11-16 | 2017-03-08 | 东华大学 | A kind of biodegradable nail and preparation method thereof that develops of load BMPs |
| CN108236519A (en) * | 2016-12-26 | 2018-07-03 | 重庆润泽医药有限公司 | For the tantalum bar device of operation |
| CN108852488A (en) * | 2018-07-10 | 2018-11-23 | 西安卓恰医疗器械有限公司 | A kind of medical internal fixing peg for fracture and medical fracture setting tool |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204394657U (en) | A kind of internal fixation bar of fracturing for fracture around joint and short tubular bone | |
| CN203138752U (en) | Biological type core decompression bar | |
| CN104546100B (en) | Dynamic compression locking plate for treatment of femoral neck fracture | |
| WO2016127522A1 (en) | Porous bionic internal fixation apparatus for promoting fracture healing | |
| CN201790888U (en) | Medical perfusion type dynamic hip screw | |
| CN205019150U (en) | Pressurization intramedullary nail | |
| CN108852488A (en) | A kind of medical internal fixing peg for fracture and medical fracture setting tool | |
| CN201642283U (en) | Stable interlocking intramedullary needle for treating bone fracture | |
| CN204484283U (en) | A kind ofly promote the bionical inner fixing device of the porous of union of fracture | |
| CN109259842A (en) | A kind of femur marrow internal fixation nail | |
| CN207912749U (en) | Static(al) pressurization anti-back hollow screw device | |
| CN110279447A (en) | A kind of Combined spiral enhanced type bone anchors | |
| CN202637081U (en) | Telescopic metal spicule | |
| CN213156368U (en) | Combined screw capable of improving fixing effect of femoral neck fracture of child | |
| CN209332235U (en) | A kind of femur marrow internal fixation nail | |
| CN205411287U (en) | Self tapping type marrow internal fixation device suitable for long bone fracture | |
| CN106618703B (en) | Beta titanium alloy anti-drop bone nail for condyle sagittal fracture and use method thereof | |
| CN108186102A (en) | Non metal implant screw locking structure | |
| CN201073336Y (en) | Self-tapping taking-out type femur neck hollow nail | |
| RU62796U1 (en) | LOCK FOR INTRACOSTIC LOCKING OSTEOSYNTHESIS | |
| RU132718U1 (en) | INTRAMEDULAR SPOKE FOR OSTEOSYNTHESIS | |
| CN209107550U (en) | Non metal implant screw locking structure | |
| CN106725788A (en) | A kind of wing plate with curved surface internal fixation system for spondylolysis and spondylolithesis of the lumbar spine | |
| CN205107981U (en) | Artifical hip joint prosthesis handle of fracture around treatment false body | |
| RU98901U1 (en) | DEVICE FOR REINFORCEMENT OF THE FEMORAL NECK AND PREVENTIVE PREVENTION OF FRACTURES |
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 |
Granted publication date: 20150617 Termination date: 20211229 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |