CN205458850U - Medical auto -lock nature interface screw - Google Patents
Medical auto -lock nature interface screw Download PDFInfo
- Publication number
- CN205458850U CN205458850U CN201521086711.1U CN201521086711U CN205458850U CN 205458850 U CN205458850 U CN 205458850U CN 201521086711 U CN201521086711 U CN 201521086711U CN 205458850 U CN205458850 U CN 205458850U
- Authority
- CN
- China
- Prior art keywords
- screw
- pitch
- ligament
- spiral shell
- locking
- 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.)
- Active
Links
Landscapes
- Surgical Instruments (AREA)
- Prostheses (AREA)
Abstract
The embodiment of the utility model discloses medical auto -lock nature interface screw, include: anterior and the spiral shell screw tail portion of screw, wherein, the anterior pitch of screw is greater than the pitch of spiral shell screw tail portion, the screw is anterior including the pin fin portion of rotary -table form and the screw body of rod of cylinder type, spiral shell screw tail portion is equipped with tooling hole. The anterior pitch of screw is greater than the pitch of spiral shell screw tail portion, because when rebuilding the ligament, the screw is anterior can the advanced person to the marrow in the tunnel, and the probability of the friction of the anterior screw thread of the great screw of pitch and ligament or shearing is little for the damage that the ligament received is little, and spiral shell screw tail position in the outside in bone tunnel, the screw of the less spiral shell screw tail portion of pitch is minimum to the harm of ligament, and spiral shell screw tail portion can increase with the area of contact on bone cortex layer, the effect of playing the fastening and locking certainly can be be more effectively fixed the ligament in the bone tunnel, prevents the slippage from the bone tunnel of interface screw.
Description
Technical field
This utility model relates to field of medical device, particularly relates to a kind of Medical self-locking interface
Screw.
Background technology
When before and after human body knee joint, ligamentaum cruciatum sustains damage, need damage ligament is carried out weight
Building, at present, in clinical medicine, ligament is fixed on by commonly used interference screw by extruding
In osseous tunnel.
Interference screw is during screwing in osseous tunnel, and its screw thread is due to meeting spin friction, to tough
Band causes damage in various degree.Skeleton outermost layer is cortical layer, and compressive resistance is strong；People
Being spongy bone part inside body skeleton, the quality hole that loosens is many.Cortical layer is hard is conducive to boundary
Fixing of face screw, its thickness generally only several millimeters, but interference screw and its extruding are certainly
Determine the fixation degree to ligament.In actual use, commonly used coarse thread
The interference screw of structure, interference screw (being here the referred to as coarse thread screw) spiral shell of coarse thread structure
Stricture of vagina is wider, and flight pitch is relatively big, and the probability rubbing or shearing between ligament is little, and ligament is subject to
Situation about damaging is few, but, coarse thread screw is the least with the contact area of cortical layer, and it is right to reduce
The firmness that ligament is fixing.The power that human body knee joint ligament is born at the volley is relatively strong,
During post-operative recovery, coarse thread screw easily slips, and loses fixation.
Thus, the most both can guarantee that the damage that ligament is caused by interference screw was less, can guarantee that again
The firmness fixing to ligament, is that those skilled in the art are presently required and solve the technical problem that.
Utility model content
The purpose of this utility model is to provide a kind of Medical self-locking interference screw, can protect
The damage that ligament is caused by card interference screw is less, can guarantee that again the firmness fixing to ligament,
It is that those skilled in the art are presently required and solve the technical problem that.
For solving above-mentioned technical problem, this utility model provides following technical scheme:
A kind of Medical self-locking interference screw, including: screw front portion and screw afterbody, wherein,
The pitch of described screw front portion includes circle more than the pitch of described screw afterbody, described screw front portion
The nail head of stage body shape and the screw thread body of rod of column type, described screw afterbody is provided with tooling hole.
Preferably, the length that described screw is anterior is not less than the total length of described self-locking performance interference screw
70%.
Preferably, described tooling hole is to become pre-axially from described nail head to described screw afterbody
If the through hole of tapering, wherein, the cross section of the described through hole being positioned at described nail head is circle.
The cross section being preferably located at the described through hole in described screw afterbody is cross.
Preferably, described Medical self-locking interference screw is biodegradable interference screw.
Preferably, described Medical self-locking interference screw be biodegradable class aliphatic polyester with
The compounding substances interference screw of synthos.
Preferably, described Medical self-locking interference screw is polyether-ether-ketone interference screw.
Preferably, the described screw thread body of rod of described screw afterbody and described screw front portion detachably connects
Connect.
Compared with prior art, technique scheme has the advantage that
The Medical self-locking interference screw that this utility model embodiment is provided, including: before screw
Portion and screw afterbody, wherein, the pitch of described screw front portion is more than the pitch of described screw afterbody,
Described screw front portion includes the nail head of Rotary-table shape and the screw thread body of rod of column type, described screw
Afterbody is provided with tooling hole.The pitch of screw front portion is more than the pitch of screw afterbody, due to tough
When band is rebuild, screw front portion can be introduced in osseous tunnel, and the screw front portion that pitch is bigger
The friction of screw thread and ligament or the probability sheared little so that the damage suffered by ligament is little；And spiral shell
Nail afterbody is positioned at the outermost of osseous tunnel, the screw thread of the screw afterbody that pitch the is less damage to ligament
Evil is minimum, and screw afterbody can increase the contact area with cortical layer, plays fastening
With the effect of self-locking, more efficiently ligament can be fixed in osseous tunnel, prevent interface
Screw slips from osseous tunnel.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art,
The accompanying drawing used required in embodiment or description of the prior art will be briefly described below,
It should be evident that the accompanying drawing in describing below is embodiments more of the present utility model, for this
From the point of view of the those of ordinary skill of field, on the premise of not paying creative work, it is also possible to according to
These accompanying drawings obtain other accompanying drawing.
The Medical self-locking interface spiral shell that Fig. 1 is provided by a kind of detailed description of the invention of this utility model
Pin structure schematic diagram；
The Medical self-locking interface spiral shell that Fig. 2 is provided by a kind of detailed description of the invention of this utility model
Nail uses schematic diagram.
Detailed description of the invention
Core of the present utility model is to provide a kind of Medical self-locking interference screw, can protect
The damage that ligament is caused by card interference screw is less, can guarantee that again the firmness fixing to ligament,
It is that those skilled in the art are presently required and solve the technical problem that.
It is understandable in order to enable above-mentioned purpose of the present utility model, feature and advantage to become apparent from,
Below in conjunction with the accompanying drawings detailed description of the invention of the present utility model is described in detail.
Elaborate detail in the following description so that fully understanding this utility model.But
This utility model can be different from alternate manner described here implement with multiple, this area skill
Art personnel can do similar popularization in the case of this utility model intension.Therefore this reality
Do not limited by following public detailed description of the invention with novel.
Refer to Fig. 1 and Fig. 2, Fig. 1 provided by this utility model one detailed description of the invention
Medical self-locking interference screw structural representation；Fig. 2 is that this utility model one is embodied as
The Medical self-locking interference screw that mode is provided uses schematic diagram.
A kind of detailed description of the invention of the present utility model provides a kind of Medical self-locking interface spiral shell
Nail 10, including: screw anterior 1 and screw afterbody 2, wherein, the pitch of screw front portion 1 is big
In the pitch of screw afterbody 2, screw front portion 1 includes nail head 11 and the column type of Rotary-table shape
The screw thread body of rod 12, screw afterbody 2 is provided with tooling hole 3.
In the present embodiment, as in figure 2 it is shown, first graft 4 is passed through a fixing line
Fastening, graft 4 is placed in osseous tunnel 5, then by Medical self-locking interference screw
10 are squeezed in osseous tunnel 5.
The screw of Medical self-locking interference screw anterior 1 uses coarse thread, and screw afterbody 2 is adopted
Use fine thread.Fashionable to osseous tunnel inward turning at Medical self-locking interference screw, screw front portion 1
Long with the time of contact of ligament, owing to the screw thread of screw front portion 1 is wider, flight pitch is relatively
Greatly, and the probability rubbing or shearing between ligament is little, and therefore, the screw of coarse thread is anterior
The damage of 1 pair of ligament is less.And screw afterbody 2 finally screws in osseous tunnel, itself and cortical bone portion
Dividing time of contact long, owing to the screw thread of screw afterbody 2 is narrower, flight pitch is less, it is possible to increase
Big with the contact area of cortical bone part, increase frictional resistance, play the work fastened with self-locking
With, the locking of interference screw can be improved, can more efficiently ligament be fixed on bone tunnel
In road, prevent interference screw from slipping from osseous tunnel.The nail head 11 of Rotary-table shape is easy to medical
Self-locking performance interference screw screws in osseous tunnel, and the tooling hole of screw afterbody 2 is used for coordinating spanner etc.
Instrument, facilitates medical personnel etc. to be screwed in nail road by interference screw.
It should be noted that in the present embodiment, so-called " coarse thread " and " closely-pitched
Screw thread " be in the case of the two compares, the width of thread and pitch big for coarse thread,
Otherwise it is fine thread.The tooth of the tooth number coarse thread to be more than of fine thread in same distance
Number, in identical reach, the tooth number of screw-in is also the most more, interference screw and osseous tissue
Between frictional resistance the biggest, the pitch of coarse thread and fine thread is entered according to actual needs
Row is arranged, and this is not limited by present embodiment.
Also, it should be noted in the present embodiment, although screw head and screw afterbody
Thread pitch is different, but screw head is together with smooth connection with the screw thread of screw afterbody.
In a kind of embodiment of the present utility model, the length of screw front portion 1 is not less than self-locking
The 70% of the total length of property interference screw.The i.e. length of screw afterbody 2 is not more than self-locking performance interface spiral shell
The 30% of the total length of nail, this make interference screw generally screw afterbody length with
The thickness of cortical bone part is close.So, the screw afterbody that pitch is less is substantially stationary in bone
Cortical section, will not cause bigger infringement to ligament.
In a kind of embodiment of the present utility model, tooling hole 3 be axially from nail head to
Screw afterbody becomes to preset the through hole of tapering, and wherein, the cross section of the through hole being positioned at nail head is
Circular.Further, the cross section of the through hole being positioned at screw afterbody is cross.
In the present embodiment, tooling hole 3 not only has the effect of rotary interface screw, the most double
The effect that tool guides.When operation, the through hole being positioned at nail head of interference screw is enclosed within and leads
On pin, thus interference screw is sent in osseous tunnel exactly, then by supporting spanner
Insert the tooling hole being positioned at screw afterbody, interference screw is screwed in nail road.In order to prevent boundary
Situation about falling off between face screw and spanner, both are all designed with certain tapering
Structure, in order to be further ensured that the reliability of the connection between the instrument such as interference screw and spanner,
The through hole being positioned at threaded rod body and the through hole being positioned at screw afterbody keep the concordance of shape,
So can increase the contact area of the instrument such as tooling hole and spanner of interference screw, prevent will
During interference screw screw-in osseous tunnel, instrument and interference screw surprisingly slip.
It should be noted that present embodiment is simply preferably placed at the horizontal stroke of the through hole in screw afterbody
Cross section is cross, and the via design that can also will be located in screw afterbody as required becomes cross section
For various shapes such as yi word pattern, polygonal blossom type, pentagon, hexagons, as long as can guarantee that
During rotation, the instrument such as spanner is difficult to depart from interference screw, and present embodiment is to this not
Limit.
In a kind of embodiment of the present utility model, Medical self-locking interference screw is that biology can
Degraded interference screw.
In order to meet the demand of the positive rehabilitation of getting up early, the fixing intensity of graft at about 500N,
The fixing intensity of current metal interference screw is about 400～600N, biodegradable interference screw
Fixing intensity be 327～410N, therefore, biodegradable interference screw ligament reconstructive perform the operation
Having implant to loosen during rehabilitation or the situation of abjection occurs, main cause is ligament tibia end tunnel
Road inner boundary screw loosening or skid off caused.Inventor studies discovery, and this is as background technology portion
Dividing and sayed, less in order to ensure the damage to ligament, the pitch of interference screw is relatively big caused.And
Medical self-locking interference screw in present embodiment is biodegradable interference screw, due to it
Screw front portion uses coarse thread, which ensure that the part with ligament dominant touch will not be to ligament
Causing bigger damage, meanwhile, screw afterbody uses fine thread, improve interference screw with
The locking of cortical bone part so that biodegradable interference screw have stronger tightness and
Self-locking performance, is possible to prevent interference screw to slip from osseous tunnel.
Further, described Medical self-locking interference screw is biodegradable class aliphatic polyester
Compounding substances interference screw with synthos.
Present embodiment with the mixture of biodegradable class aliphatic polyester with synthos is
Raw material, the most biodegradable class aliphatic polyester includes Poly-L-lactic acid (PLLA), disappears outward
Rotation polylactic acid (PDLLA), dextrorotation polylactic acid/Poly-L-lactic acid (PDLA/PLLA) mixture,
PDLLA/PLLA mixture, poly (glycolide-lactide) (PLGA), PLGA/PLLA mixture etc.,
Synthos include hydroxyapatite, tricalcium phosphate, calcium pyrophosphate, calcium hydrogen phosphate, phosphoric acid hydrogen
A kind of or the mixture of wherein two or more synthos in calcium two hydrate, along with planting
The growth of the angle of incidence, before and after being repaired, ligamentaum cruciatum can gradually be fully recovered, this composite meeting
In body degradable, gradually excrete with the form of water and carbon dioxide, without any
Residual, synthos are similar to skeleton composition, have good osteogenic, promote to a certain extent
Enter the connection of ligament and skeleton, and synthos are evenly distributed in biodegradable class fat
In adoption ester so that it is degradation speed is the slowest, it is to avoid owing to catabolite piles up the nothing produced
Bacterium inflammation.
In a kind of embodiment of the present utility model, Medical self-locking interference screw can also be excellent
Electing polyether-ether-ketone interference screw as, polyether-ether-ketone is a kind of spy having excellent rigidity and flexibility concurrently
Planting macromolecular material, polyether-ether-ketone interference screw has excellent fatigue durability.This kind of interface spiral shell
Nail can play good fastening effect.
In a kind of embodiment of the present utility model, screw afterbody and the threaded rod of screw front portion
Body removably connects.
Owing to the thickness of everyone cortical bone part is different, even if same person difference health
The thickness of the cortical bone part of part is likely to be not quite similar, screw afterbody and the spiral shell of screw front portion
Rasp bar body removably connects, so can be as required by screw afterbody and the screw of different length
Front portion is attached, and can meet the needs of the personnel of different cortex thickness of bone, be further ensured that
Ligament will not be caused damage.
It should be noted that in the present embodiment, the screw afterbody that needs to ensure to connect and
Screw head screw thread between the two is smooth linking together, and is so conducive to interface spiral shell
Nail screws in osseous tunnel, and does not results in bigger damage.
In sum, the Medical self-locking interference screw that this utility model embodiment is provided, spiral shell
The anterior pitch of nail is more than the pitch of screw afterbody, due to when ligament is rebuild, and screw
Front portion can be introduced in osseous tunnel, and the friction of the anterior screw thread of the bigger screw of pitch and ligament
Or the probability of shearing is little so that the damage suffered by ligament is little；And screw afterbody is positioned at osseous tunnel
Outermost, the screw thread of the screw afterbody that pitch is less is minimum to the infringement of ligament, and screw
Afterbody can increase the contact area with cortical layer, plays the effect of fastening and self-locking, can
To be more efficiently fixed in osseous tunnel by ligament, prevent interference screw from slipping from osseous tunnel.
This utility model is provided a kind of Medical self-locking interference screw carried out in detail above
Introduce.Principle of the present utility model and embodiment are carried out by specific case used herein
Illustrating, the explanation of above example is only intended to help to understand core concept of the present utility model.
It should be pointed out that, for those skilled in the art, new without departing from this practicality
On the premise of type principle, it is also possible to this utility model is carried out some improvement and modification, these change
Enter and modification also falls in this utility model scope of the claims.
Claims (7)
1. a Medical self-locking interference screw, it is characterized in that, including: screw front portion and screw afterbody, wherein, the pitch of described screw front portion is more than the pitch of described screw afterbody, described screw front portion includes the nail head of Rotary-table shape and the screw thread body of rod of column type, and described screw afterbody is provided with tooling hole.
Medical self-locking interference screw the most according to claim 1, it is characterised in that the length of described screw front portion is not less than the 70% of the total length of described self-locking performance interference screw.
Medical self-locking interference screw the most according to claim 2, it is characterised in that described tooling hole is to become to preset the through hole of tapering to described screw afterbody axially from described nail head, and wherein, the cross section of the described through hole being positioned at described nail head is circle.
Medical self-locking interference screw the most according to claim 3, it is characterised in that the cross section of the described through hole being positioned at described screw afterbody is cross.
5. according to the Medical self-locking interference screw described in any one of Claims 1-4, it is characterised in that described Medical self-locking interference screw is biodegradable interference screw.
6. according to the Medical self-locking interference screw described in any one of Claims 1-4, it is characterised in that described Medical self-locking interference screw is polyether-ether-ketone interference screw.
7. according to the Medical self-locking interference screw described in any one of Claims 1-4, it is characterised in that the described screw thread body of rod of described screw afterbody and described screw front portion removably connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521086711.1U CN205458850U (en) | 2015-12-23 | 2015-12-23 | Medical auto -lock nature interface screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521086711.1U CN205458850U (en) | 2015-12-23 | 2015-12-23 | Medical auto -lock nature interface screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205458850U true CN205458850U (en) | 2016-08-17 |
Family
ID=56661379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521086711.1U Active CN205458850U (en) | 2015-12-23 | 2015-12-23 | Medical auto -lock nature interface screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205458850U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107714119A (en) * | 2017-11-03 | 2018-02-23 | 运怡（北京）医疗器械有限公司 | A kind of interference screw inversely installed |
| WO2018113579A1 (en) * | 2016-12-19 | 2018-06-28 | 兰州西脉记忆合金股份有限公司 | High-strength absorbable internal fixation bone screw for fractures |
| CN108403173A (en) * | 2017-12-30 | 2018-08-17 | 深圳市立心科学有限公司 | The extruding nail and its assembly tool of the fixed ligament of orthopaedics |
| CN111359025A (en) * | 2020-04-15 | 2020-07-03 | 花沐医疗科技(上海)有限公司 | Orderly-absorbed composite absorbable interface screw system with sheath and preparation method thereof |
| CN114366202A (en) * | 2021-12-31 | 2022-04-19 | 上海利格泰生物科技有限公司 | Use method of interface screw |
-
2015
- 2015-12-23 CN CN201521086711.1U patent/CN205458850U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018113579A1 (en) * | 2016-12-19 | 2018-06-28 | 兰州西脉记忆合金股份有限公司 | High-strength absorbable internal fixation bone screw for fractures |
| US11607257B2 (en) | 2016-12-19 | 2023-03-21 | Suzhou Seemine-Nebula Biotechnology Co., Ltd | High-strength absorbable internal fixation bone screw for fracture |
| CN107714119A (en) * | 2017-11-03 | 2018-02-23 | 运怡（北京）医疗器械有限公司 | A kind of interference screw inversely installed |
| CN107714119B (en) * | 2017-11-03 | 2024-05-03 | 运怡（北京）医疗器械有限公司 | Interface screw of reverse installation |
| CN108403173A (en) * | 2017-12-30 | 2018-08-17 | 深圳市立心科学有限公司 | The extruding nail and its assembly tool of the fixed ligament of orthopaedics |
| CN112971886A (en) * | 2017-12-30 | 2021-06-18 | 深圳市立心科学有限公司 | Extrusion nail for fixing ligament and assembling tool thereof |
| CN112971886B (en) * | 2017-12-30 | 2022-01-04 | 深圳市立心科学有限公司 | Extrusion nail for fixing ligament and assembling tool thereof |
| CN111359025A (en) * | 2020-04-15 | 2020-07-03 | 花沐医疗科技(上海)有限公司 | Orderly-absorbed composite absorbable interface screw system with sheath and preparation method thereof |
| CN111359025B (en) * | 2020-04-15 | 2022-03-15 | 花沐医疗科技(上海)有限公司 | Orderly-absorbed composite absorbable interface screw system with sheath and preparation method thereof |
| CN114366202A (en) * | 2021-12-31 | 2022-04-19 | 上海利格泰生物科技有限公司 | Use method of interface screw |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205458850U (en) | Medical auto -lock nature interface screw | |
| US11766283B2 (en) | Bone screws and methods of use thereof | |
| CN104173095B (en) | A kind of orthopaedics extrusion screw | |
| US10010355B2 (en) | Intramedullary nail with oblique openings | |
| CN101340851B (en) | Orthopedic rod with locking aperture | |
| CN105055049B (en) | Endoprosthesis for reestablishment of knee joint cruciate ligaments under full arthroscope | |
| JP2018503492A (en) | Device for variable fixation of bone fragments | |
| US20070123875A1 (en) | Intramedullary nail | |
| CN107997857A (en) | A kind of sealed knee joint tibial component of W types | |
| CN201019825Y (en) | Pressurization locking power coax nail-plate device | |
| CN103494637B (en) | Encircle locking bone fracture plate | |
| De Molon et al. | In vitro comparison of 1.5 mm vs. 2.0 mm screws for fixation in the sagittal split osteotomy | |
| CN110279447A (en) | A kind of Combined spiral enhanced type bone anchors | |
| CN204951039U (en) | Be used for restoreing defective device of ligament or tendon | |
| CN104323847B (en) | Intramedullary nail with lock | |
| EP3705070B1 (en) | Nonmetal implant screw locking structure | |
| CN105877832A (en) | Femoral neck fixing mechanism and femoral neck fracture fixing structure thereof | |
| CN204428147U (en) | A kind of neck of femur fixed mechanism and fracture of femoral neck fixed structure thereof | |
| CN209203377U (en) | A kind of soft tissue fixing belt line holdfast | |
| CN207286128U (en) | Fracture of calcaneus inner fixing device | |
| CN203598035U (en) | Dynamic hip screw with movable sleeve | |
| CN107714119B (en) | Interface screw of reverse installation | |
| CN206852655U (en) | Fractured near end of thighbone improves locking steel plate inner fixing device | |
| CN206214168U (en) | Artificial vertebral body fixed system | |
| Haddad et al. | Successful fixation of an intertrochanteric fracture after hip resurfacing arthroplasty using cannulated screws |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |