CN203263520U - Bone screw - Google Patents
Bone screw Download PDFInfo
- Publication number
- CN203263520U CN203263520U CN 201320344581 CN201320344581U CN203263520U CN 203263520 U CN203263520 U CN 203263520U CN 201320344581 CN201320344581 CN 201320344581 CN 201320344581 U CN201320344581 U CN 201320344581U CN 203263520 U CN203263520 U CN 203263520U
- Authority
- CN
- China
- Prior art keywords
- bone
- thread section
- screw
- section
- rivet nut
- 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
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Abstract
The utility model discloses a bone screw. The bone screw comprises a screw body and a screw cap connected with the rear end of the screw body. The bone screw is structurally characterized by also comprising a through hole which runs through the screw cap and the whole screw body, wherein the front end of the screw body is pointed; the screw body comprises a thin thread section, a thick thread section and a smooth section sequentially from front to back; the screw pitch of the thread of the thick thread section is 2 to 3 times that of the thread of the thick thread section. The screw body is divided into the thin thread section, the thick thread section and the smooth section; after the bone screw is implanted in a bone, the thin thread section penetrates a cortical layer and a cancellous bone layer on the upper part of the bone as well as a cancellous bone layer and a cortical layer at the lower part of the bone sequentially to be locked, and the thick thread section is locked with the cancellous bone layer and the cortical layer on the bone; the thin thread section is locked most tightly, the locking effect of the thick thread section is second to that of the thin thread section, and the smooth section is not locked with the bone, so that firm fixation of the bone screw is guaranteed, the bone is not completely locked, a good growth and healing space is created for the bone, and the quick healing of the bone is promoted.
Description
Technical field
This utility model relates to a kind of bone screw.
Background technology
The bone screw of using in bone surgery at present comprises rivet nut and the head of a nail, and the outer surface of rivet nut is provided with elongated screw thread.This kind bone screw is generally used for after bone fracture the situation of combination again, after operation, bone screw keeps a period of time usually until the bone healing in human body, bone needs certain healing space when growth, and this kind bone screw is when implanting bone, its screw thread locks mutually with cortical layer and the spongiosa osteoplaque of bone, bone screw is difficult for loosening in inside bone, be unfavorable for the growth of bone, affects final healing effect.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of fixation and is beneficial to the bone screw of bone healing.
For solving the problems of the technologies described above, this utility model comprises rivet nut and is connected to the head of a nail of rivet nut rear end, its construction features is also to comprise the through hole that runs through the head of a nail and whole rivet nut, the front end of described rivet nut is pointed, described rivet nut comprises fine thread section, coarse-pitch thread section and smooth section after by forward direction successively, and the pitch of the screw thread of described coarse-pitch thread section is 2 ~ 3 times of fine thread section thread pitch.
after adopting said structure, this utility model is divided into the fine thread section with rivet nut, coarse-pitch thread section and smooth section, after bone screw is implanted bone, its fine thread section is passed the cortical layer on bone top successively, the spongiosa osteoplaque of spongiosa osteoplaque and bone cavity and bottom and cortical layer are to locking, the coarse-pitch thread section locks mutually with spongiosa osteoplaque and cortical layer on bone, the locking of fine thread section is the tightest, coarse-pitch thread section locking effect is inferior to the fine thread section, smooth section does not lock with bone, like this when guaranteeing that bone screw fixedly secures, bone is not locked fully extremely, create good growth healing space to bone, be beneficial to the bone quickly-healing.
Described through hole eccentric setting.
The described head of a nail is provided with interior hexagonal groove.
Described rivet nut is made by titanium alloy.
Description of drawings
Below in conjunction with the drawings and the specific embodiments, this utility model is described in further detail:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is that Fig. 1 is along the cross-sectional schematic of A-A line.
The specific embodiment
As depicted in figs. 1 and 2, bone screw comprises the rivet nut 1 of being made by titanium alloy, the head of a nail 2 that is connected to rivet nut 1 rear end, and the through hole 4 that runs through the head of a nail 2 and whole rivet nut 1, thereby wherein through hole 4 eccentric settings guarantee that the front end of rivet nut 1 is pointed, the head of a nail 2 is provided with interior hexagonal groove 3.The front end of rivet nut 1 is pointed, and rivet nut 1 is by comprising successively fine thread section 11, coarse-pitch thread section 12 and smooth section 13 after forward direction, and the pitch of the screw thread of coarse-pitch thread section 12 is 2 ~ 3 times of fine thread section 11 thread pitch.
During clinical use, first connect the bone piece of fracture or fracture with guide pin, play the effect that pre-fixes, bone screw is set on guide pin, connect the bone piece of fracture or fracture by the threaded portion of bone screw, after bone screw fixes, take out guide pin and get final product.
this utility model is divided into fine thread section 11 with rivet nut 1, coarse-pitch thread section 12 and smooth section 13, after bone screw is implanted bone, its fine thread section 11 is passed the cortical layer on bone top successively, the spongiosa osteoplaque of spongiosa osteoplaque and bone cavity and bottom and cortical layer are to locking, coarse-pitch thread section 12 locks mutually with spongiosa osteoplaque and cortical layer on bone, 11 lockings of fine thread section are the tightest, coarse-pitch thread section 12 locking effects are inferior to fine thread section 11, smooth section 13 does not lock with bone, like this when guaranteeing that bone screw fixedly secures, bone is not locked fully extremely, create good growth healing space to bone, be beneficial to the bone quickly-healing.
The above is only preferred embodiment of the present utility model, is not limited to this utility model.Previous embodiment has been described in detail this utility model, and for a person skilled in the art, it still can be modified to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement.In every case within inventive concept scope of the present utility model, any modification of making, be equal to replacement, improvement etc., within all being included in protection domain of the present utility model.
Claims (4)
1. bone screw, comprise rivet nut (1) and be connected to the head of a nail (2) of rivet nut (1) rear end, it is characterized in that also comprising the through hole (4) that runs through the head of a nail (2) and whole rivet nut (1), the front end of described rivet nut (1) is pointed, described rivet nut (1) is by comprising successively fine thread section (11), coarse-pitch thread section (12) and smooth section (13) after forward direction, the pitch of the screw thread of described coarse-pitch thread section (12) is 2 ~ 3 times of fine thread section (11) thread pitch.
2. bone screw according to claim 1, is characterized in that described through hole (4) eccentric setting.
3. bone screw according to claim 2, is characterized in that the described head of a nail (2) is provided with interior hexagonal groove (3).
4. the described bone screw of according to claim 1 to 3 any one is characterized in that described rivet nut (1) made by titanium alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320344581 CN203263520U (en) | 2013-06-17 | 2013-06-17 | Bone screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320344581 CN203263520U (en) | 2013-06-17 | 2013-06-17 | Bone screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203263520U true CN203263520U (en) | 2013-11-06 |
Family
ID=49494029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320344581 Expired - Fee Related CN203263520U (en) | 2013-06-17 | 2013-06-17 | Bone screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203263520U (en) |
-
2013
- 2013-06-17 CN CN 201320344581 patent/CN203263520U/en not_active Expired - Fee Related
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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 |
Granted publication date: 20131106 Termination date: 20140617 |
|
| EXPY | Termination of patent right or utility model |