CN203208106U - Half-thread spongy bone hollow screw - Google Patents
Half-thread spongy bone hollow screw Download PDFInfo
- Publication number
- CN203208106U CN203208106U CN 201220662121 CN201220662121U CN203208106U CN 203208106 U CN203208106 U CN 203208106U CN 201220662121 CN201220662121 CN 201220662121 CN 201220662121 U CN201220662121 U CN 201220662121U CN 203208106 U CN203208106 U CN 203208106U
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- thread
- hollow screw
- spongy bone
- nail
- tail
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Abstract
The utility model relates to a half-thread spongy bone hollow screw which comprises a nail head (1), a nail rod (2) and a nail tail (3). The hollow screw has a total length of 35 to 140mm; the nail rod (2) is a titanium alloy nail body; a through hole with a diameter of 2.2mm is formed in the nail rod (2); and the nail rod (2) comprises a threaded section at the front end and an unthreaded section at the tail end. The half-thread spongy bone hollow screw disclosed by the utility model has a simple structure and is simple and convenient to use.
Description
Technical field
The present invention relates to a kind of orthopedic medical device, particularly a kind of half-thread spongy bone hollow screw.
Background technology
Along with economic construction and developing of automobile industry, the sickness rate of high-energy damage increases day by day.For the patient of high-octane pelvic ring damage, often damage is heavier, and the traumatic condition complexity concerning doctor and patient, is treated very thorny.In in the past 20 years, development along with anatomy and image technology, micro-wound percutaneous hollow screw technique for fixing is little with wound, amount of bleeding is few, advantage such as soft tissue injury is light, infection rate after abortion operation is low, post-operative recovery is fast and the ectopic ossification incidence rate is low has been widely used in the every field of Wicresoft's orthopaedics.But because fracture and the damage of different anatomic, its requirement to hollow screw is also had nothing in common with each other.Especially for the fracture of pelvis acetabular anterior column, because its unique anatomic characteristic: curvature is excessive, makes that the bone " escape way " of hollow screw is very narrow.In clinical, hollow screw commonly used is difficult to satisfy clinical needs at present.
Summary of the invention
The objective of the invention is to overcome the deficiency of traditional hollow screw, when using micro-wound percutaneous pulling force hollow screw treatment acetabular anterior column to fracture, for clinical position provides a kind of new half-thread spongy bone hollow screw.
Half-thread spongy bone hollow screw ailhead of the present invention, nail bar and nail tail, the total length of hollow screw is 35-140mm; The nail bar is titanium alloy hollow nail bar, in diameter is arranged is the through hole of 2.2mm, comprise the thread segment of front end and the no thread segment of tail end, no thread segment diameter is 3.6mm, and the Major Diam of thread segment is 5.5mm, and the screw thread path is 3.5mm, pitch is 1.75mm, and spiral shell is thick to be 0.1mm, and tooth form operating angle α is 5
0, tooth form inoperative angle β is 25
0, the rear end chamfer radius is 0.3mm at the bottom of the thread, the Leading end chamfer radius is 0.8mm at the bottom of the thread.
Wherein, ailhead is self tapping three cutting edges; The nail tail is interior six rib matrix bulbs, and the bulb diameter is 7mm.Length is 4.2mm.
Half-thread spongy bone hollow screw of the present invention can pass through narrow " escape way " of acetabular anterior column bone smoothly, for the acetabular anterior column fracture provides better hold and stability, and simple in structure, easy to use.
Description of drawings
Fig. 1 is half-thread spongy bone hollow screw sketch map of the present invention;
Fig. 2 is the thread segment screw thread sketch map on the hollow screw of the present invention.
The specific embodiment
In order more at large to understand technical scheme of the present invention, below in conjunction with accompanying drawing the present invention is made concrete elaboration.
As shown in Figure 1, 2, half-thread spongy bone hollow screw of the present invention comprises ailhead 1, nail bar 2 and nail tail 3, and the length of half-thread spongy bone hollow screw is 35-140mm.Nail bar 2 be titanium alloy hollow nail bar, in diameter is arranged is the through hole of 2.2mm, follow closely bar 2 and comprise that front end length is the thread segment of 32mm and the no thread segment of tail end, no thread segment diameter is 3.6mm.The Major Diam of thread segment is 5.5mm, and the screw thread path is 3.5mm, and pitch is 1.75mm, and spiral shell is thick to be 0.1mm, and tooth form operating angle α is 5
0, tooth form inoperative angle β is 25
0, the rear end chamfer radius is 0.3mm at the bottom of the thread, the Leading end chamfer radius is 0.8mm at the bottom of the thread.Ailhead 1 is self tapping three cutting edges, is conducive to self tapping in bone.Nail tail 3 diameters are 7mm, and length is 4.2mm, and nail tail 3 is interior six rib matrix bulbs, are conducive to twist screw with six rib screwdrivers.
Claims (3)
1. half-thread spongy bone hollow screw, it comprises ailhead (1), nail bar (2) and follows closely tail (3) that it is characterized in that: the total length of described hollow screw is 35-140mm; Nail bar (2) is titanium alloy hollow nail bar, in diameter is arranged is the through hole of 2.2mm, comprise the thread segment of front end and the no thread segment of tail end, no thread segment diameter is 3.6mm, the Major Diam of thread segment is 5.5mm, and the screw thread path is 3.5mm, and pitch is 1.75mm, spiral shell is thick to be 0.1mm, and tooth form operating angle α is 5
0, tooth form inoperative angle β is 25
0, the rear end chamfer radius is 0.3mm at the bottom of the thread, the Leading end chamfer radius is 0.8mm at the bottom of the thread.
2. half-thread spongy bone hollow screw as claimed in claim 1, it is characterized in that: ailhead (1) is self tapping three cutting edges.
3. half-thread spongy bone hollow screw as claimed in claim 1 or 2 is characterized in that: nail tail (3) is interior six rib matrix bulbs, and the bulb diameter is 7mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220662121 CN203208106U (en) | 2012-12-05 | 2012-12-05 | Half-thread spongy bone hollow screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220662121 CN203208106U (en) | 2012-12-05 | 2012-12-05 | Half-thread spongy bone hollow screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203208106U true CN203208106U (en) | 2013-09-25 |
Family
ID=49197687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220662121 Expired - Lifetime CN203208106U (en) | 2012-12-05 | 2012-12-05 | Half-thread spongy bone hollow screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203208106U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102973315A (en) * | 2012-12-05 | 2013-03-20 | 唐佩福 | Half-thread spongy bone hollow screw |
-
2012
- 2012-12-05 CN CN 201220662121 patent/CN203208106U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102973315A (en) * | 2012-12-05 | 2013-03-20 | 唐佩福 | Half-thread spongy bone hollow screw |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130925 |
|
| CX01 | Expiry of patent term |