CN203763223U - Medical anchor type spongy bone screw - Google Patents
Medical anchor type spongy bone screw Download PDFInfo
- Publication number
- CN203763223U CN203763223U CN201420103518.3U CN201420103518U CN203763223U CN 203763223 U CN203763223 U CN 203763223U CN 201420103518 U CN201420103518 U CN 201420103518U CN 203763223 U CN203763223 U CN 203763223U
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- screw thread
- bone screw
- male screw
- screw
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Abstract
The utility model discloses a medical anchor type spongy bone screw comprising an external screw and two fixing pins, wherein the external screw is in an integral structure and is divided into a head side and a tail side, a cylindrical hollow channel for receiving a guide needle when the screw is screwed in is arranged inside, two J-shaped channels are symmetrically arranged inside the external screw, two fixing pins are inserted into the two J-shaped channels, and the two fixing pins and the external screw form an anchor structure. The contact manner of the spongy bone screw and sclerotin is changed by extending the fixing pins from the side of the screw, so that the possibility of loosening even detachment of the spongy bone screw can be reduced, the anti-rotation and anti-sliding capabilities of the spongy bone screw are effectively improved, inner fixing stability and reliability are enhanced, and operation failure rate is reduced.
Description
Technical field
This utility model belongs to medical apparatus technical field, relates to a kind of medical bone screw, and particularly a kind of anchor formula cancellous bone screw can effectively improve stability, the reliability of bone fracture internal fixing device tool.
Background technology
At present, for the fracture at the spongy bone positions such as fracture of femoral neck, fracture of the femoral condyle, fracture of the tibial plateau, slipped femoral epiphysis, conventional Therapeutic Method is by surgical operation, fixing in the local reset of fracturing; And the Sacroiliac joint injury causing for many reasons, pelvis and fracture of acetabulum also all need the internal fixation treatment of performing the operation conventionally.Clinically, different for the Therapeutic Method of concrete fracture, but its internal fixation device using mainly adopts cancellous bone screw to carry out the fixing of fracture site.Yet the major defect of its existence of cancellous bone screw of using is at present that to lift constant intensity inadequate, after often causing performing the operation screw loosening deviate from, displacement fracture, finally cause internal fixation treatment failure.Particularly for clinical common osteoporosis senile fracture patient, because its unit volume internal skeleton amount reduces, screw is significantly declined to the hold of fracture site, adopt conventional cancellous bone screw to be fixedly difficult to the therapeutic effect that reaches stable in fracturing, its anti-rotation, slide ability is poor, very easily causes internal fixation screw to become flexible, thereby causes treating failure and severe complication.
Summary of the invention
For above-mentioned existing defect and deficiency, the purpose of this utility model is, a kind of anchor formula cancellous bone screw is provided, and is mainly used in sufferers of osteoporosis face spinal surgery.
In order to realize above-mentioned task, this utility model is taked following technical solution:
A medical anchor formula cancellous bone screw, is characterized in that, male screw thread and two pieces of steady pins, consists of, and wherein, male screw thread is an overall structure, is divided into a side and tail side, and there is the cylindrical hollow duct that while supplying to be screwed into screw, guide pin is inserted inside; Wherein:
A described side has a point, and outer wall has external screw thread, for being screwed into fracture site; Described tail side is hemispherical, and there are six side's fixed grooves in the central authorities of hemispheric upper surface;
In male screw thread inside, be arranged with two " J " type ducts, and two " J " type ducts are all by afterbody and part point, from position of opening and the outside UNICOM between the external screw thread pitch of point, one of them " J " type duct at the position of opening of the external screw thread pitch of male screw thread compared with position of opening Senior Two/mono-pitch in another duct; Two pieces of steady pins are inserted in two " J " type ducts, and two pieces of steady pins and male screw thread form anchoring component.
According to this utility model, two pieces of described steady pin one end are cylinder, and the other end is taper, and " J " type duct in size and male screw thread matches.
Anchor formula cancellous bone screw of the present utility model, by the steady pin of side, can change the way of contact of cancellous bone screw and sclerotin, can reduce the loosening incidence rate of even deviating from of cancellous bone screw, effectively improve anti-rotation and the slide ability of cancellous bone screw, fixing stability and reliability in increasing, reduces operative failure incidence rate.
Accompanying drawing explanation
Fig. 1 is the male screw thread profile of medical anchor formula cancellous bone screw of the present utility model.
Fig. 2 is the top view of Fig. 1;
Fig. 3 is the steady pin section of structure of medical anchor formula cancellous bone screw of the present utility model.
Below in conjunction with accompanying drawing, structure of the present utility model is described in further detail.
The specific embodiment
As depicted in figs. 1 and 2, the present embodiment provides a kind of medical anchor formula cancellous bone screw, male screw thread 1 and two pieces of steady pins 2, consists of, wherein, male screw thread 1 is an overall structure, is divided into a side 4 and tail side 7, and there is the cylindrical hollow duct 3 that while supplying to be screwed into screw, guide pin is inserted inside; Wherein:
Described side 4 has a point, and outer wall has external screw thread 6, for being screwed into fracture site; Described tail side 7 is hemispherical, and there are six side's fixed grooves 8 in the central authorities of hemispheric upper surface;
In male screw thread 1 inside, be arranged with two " J " type ducts 9, and two " J " type ducts 9 are all by afterbody 7 and part point 5, from position of opening and the outside UNICOM between external screw thread 6 pitch of point 5, one of them " J " type duct 9 at the position of opening of external screw thread 6 pitch of male screw thread 1 compared with position of opening Senior Two/mono-pitch in another duct; Two pieces of steady pins 2 are inserted in two " J " type ducts 9, and two pieces of steady pins 2 and male screw thread 1 form anchoring component.
Whole male screw thread 1 is run through in cylindrical hollow duct 3, and six side's fixed grooves 8 from afterbody 7 are through to point 5;
Two " J " type ducts 9 are separate, and it is positioned at six side's fixed grooves 8 from afterbody 7 to the position of opening between external screw thread 6 pitch of point 5, is convenient to insert steady pin 2.
As shown in Figure 3, two pieces of steady pin 2 one end are cylinder, and the other end is taper 10, and " J " type duct 9 in size and male screw thread 1 matches.
In use, first a side 4 of male screw thread 1 being screwed into fracture site is fixed, then by 9 insertions along " J " type duct of two pieces of steady pins 2, two pieces of steady pins 2 and male screw thread 1 form anchoring component, reach that the resistance to plucking that improves cancellous bone screw goes out and the object of anti-rotation performance, increase fixing stability and reliability in fracture, reduce the incidence rate of operative failure.If find that the implantation position of male screw thread 1 is improper, can first take out steady pin 2, the male screw thread 1 of then back-outing.
Claims (2)
1. a medical anchor formula cancellous bone screw, is characterized in that, male screw thread (1) and two pieces of steady pins (2), consists of, wherein, male screw thread (1) is an overall structure, is divided into a side (4) and tail side (7), and there is the cylindrical hollow duct (3) that while supplying to be screwed into screw, guide pin is inserted inside; Wherein:
A described side (4) has a point, and outer wall has external screw thread (6), for being screwed into fracture site; Described tail side (7) is hemispherical, and there are six side's fixed grooves (8) in the central authorities of hemispheric upper surface;
In male screw thread (1) inside, be arranged with two " J " type ducts (9), and two " J " type ducts (9) are all by afterbody (7) and part point (5), from position of opening and the outside UNICOM between external screw thread (6) pitch of point (5), one of them " J " type duct (9) at the position of opening of external screw thread (6) pitch of male screw thread (1) compared with position of opening Senior Two/mono-pitch in another duct; Two pieces of steady pins (2) are inserted in two " J " type ducts (9), and two pieces of steady pins (2) and male screw thread (1) form anchoring component.
2. medical anchor formula cancellous bone screw as claimed in claim 1, is characterized in that, described two pieces of steady pins (2) one end is cylinder, and the other end is taper (10), and " J " type duct (9) in size and male screw thread (1) matches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420103518.3U CN203763223U (en) | 2014-03-07 | 2014-03-07 | Medical anchor type spongy bone screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420103518.3U CN203763223U (en) | 2014-03-07 | 2014-03-07 | Medical anchor type spongy bone screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203763223U true CN203763223U (en) | 2014-08-13 |
Family
ID=51280481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420103518.3U Expired - Fee Related CN203763223U (en) | 2014-03-07 | 2014-03-07 | Medical anchor type spongy bone screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203763223U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103860252A (en) * | 2014-03-07 | 2014-06-18 | 中国人民解放军第四军医大学 | Medical anchor type cancellous bone screw |
-
2014
- 2014-03-07 CN CN201420103518.3U patent/CN203763223U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103860252A (en) * | 2014-03-07 | 2014-06-18 | 中国人民解放军第四军医大学 | Medical anchor type cancellous bone screw |
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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: 20140813 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |