CN203059886U - Cross bilateral sacroiliac joint full thread hollow screw - Google Patents
Cross bilateral sacroiliac joint full thread hollow screw Download PDFInfo
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- CN203059886U CN203059886U CN 201220665970 CN201220665970U CN203059886U CN 203059886 U CN203059886 U CN 203059886U CN 201220665970 CN201220665970 CN 201220665970 CN 201220665970 U CN201220665970 U CN 201220665970U CN 203059886 U CN203059886 U CN 203059886U
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- sacroiliac joint
- screw
- hollow screw
- thread
- full thread
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Abstract
The utility model discloses a cross bilateral sacroiliac joint full thread hollow screw which comprises a screw head (1), a screw body (2) and a screw tail (3). The total length of the hollow screw is 125-185mm, the screw body (2) is a titanium alloy hollow screw body, a through is formed in the screw body (2), the diameter of the through hole is 2.6mm, and threads are arranged on the screw body (2). The cross bilateral sacroiliac joint full thread hollow screw is simple in structure and easy and convenient to use.
Description
Technical field
The present invention relates to a kind of orthopedic medical device, particularly a kind for the treatment of bilateral sacroiliac joint damage simultaneously, rumpbone comminuted fracture or obvious osteoporotic bilateral sacroiliac joint full thread hollow screw of striding of being applicable to.
Background technology
Along with the development of industry and transportation, the sickness rate of high-octane injury of pelvis increases day by day.For high-octane posterior ring pelvic damage, in the past 20 years, accepted by numerous clinicists gradually in the damage of the descending micro-wound percutaneous hollow screw technique for fixing treatment sacroiliac joint of X line perspective navigation.Along with the development of anatomy and image technology, iatrogenic nerve, blood vessel injury obviously reduce.But there is data to show, in the damage of the descending micro-wound percutaneous hollow screw treatment sacroiliac joint of X line perspective navigation, can reaches 84% anatomical reduction or approximate anatomical reduction, but still have 44% hollow screw misplace rate.The hollow screw of the one-sided sacroiliac joint damage for the treatment of commonly used is to insert the S1 vertebral body now, and strides across center line, to obtain its stability.But when merging the damage of offside sacroiliac joint, rumpbone comminuted fracture or obvious osteoporosis, the hollow screw of striding one-sided sacroiliac joint that uses just can not be obtained satisfied fixed effect, the report of common failure case at present.
Traditional stride one-sided sacroiliac joint hollow screw 2-3 cortical fixation from a side ilium to the damage central area can be provided.But merging the damage of offside sacroiliac joint, rumpbone comminuted fracture or obviously during osteoporosis, traditional striding one-sided sacroiliac joint hollow screw and just be difficult to the fixedly curative effect that provides satisfied and the failure that may further cause resetting.
Summary of the invention
The objective of the invention is to overcome tradition and stride the deficiency that one-sided sacroiliac joint hollow screw exists, for merging the patient of the damage of bilateral sacroiliac joint, rumpbone comminuted fracture or obvious osteoporosis situation, provide a kind of bilateral sacroiliac joint full thread hollow screw of striding.
The bilateral sacroiliac joint full thread hollow screw of striding of the present invention comprises ailhead, nail body and nail tail, and the total length of hollow screw is 125-185mm; The nail body is titanium alloy hollow nail body, in diameter is arranged is the through hole of 2.6mm, have screw thread on the nail body, Major Diam is 5.5mm, the screw thread path is 3.5mm, pitch is 1.75mm, spiral shell is thick to be 0.1mm, 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, and the nail tail is interior six rib matrix bulbs.
The bilateral sacroiliac joint full thread hollow screw of striding of the present invention is followed closely in the damage for the treatment of posterior ring pelvic when merging the damage of bilateral sacroiliac joint, rumpbone comminuted fracture or obvious osteoporosis, stride the obvious patient who stablizes when being suitable for merging the damage of bilateral sacroiliac joint, rumpbone comminuted fracture or obvious osteoporosis of one-sided sacroiliac joint screw curative effect, and it is simple in structure, easy to use.
Description of drawings
Fig. 1 is the bilateral sacroiliac joint full thread hollow screw sketch map of striding of the present invention;
Fig. 2 is the partial screw threads 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, the bilateral sacroiliac joint full thread hollow screw of striding of the present invention comprises ailhead 1, nail body 2 and nail tail 3, and the length of described hollow screw is 125-185mm, and every interval 5mm is a model.Nail body 2 be titanium alloy hollow nail body, in diameter is arranged is the through hole of 2.6mm, follow closely on the body 2 to have screw thread, Major Diam is 5.5mm, the screw thread path is 3.5mm, pitch is 1.75mm, spiral shell is thick to be 0.1mm, 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 is interior six rib matrix bulbs, is conducive to twist screw with six rib screwdrivers.
Claims (3)
1. stride bilateral sacroiliac joint full thread hollow screw for one kind, it comprises ailhead (1), nail body (2) and nail tail (3), and it is characterized in that: the total length of described hollow screw is 125-185mm; Nail body (2) be titanium alloy hollow nail body, in diameter is arranged is the through hole of 2.6mm, follow closely on the body (2) to have screw thread, Major Diam is 5.5mm, the screw thread path is 3.5mm, pitch is 1.75mm, spiral shell is thick to be 0.1mm, 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. the bilateral sacroiliac joint full thread hollow screw of striding as claimed in claim 1, it is characterized in that: ailhead (1) is self tapping three cutting edges.
3. the bilateral sacroiliac joint full thread hollow screw of striding as claimed in claim 1 or 2 is characterized in that: follow closely tail (3) and be interior six rib matrix bulbs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220665970 CN203059886U (en) | 2012-12-06 | 2012-12-06 | Cross bilateral sacroiliac joint full thread hollow screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220665970 CN203059886U (en) | 2012-12-06 | 2012-12-06 | Cross bilateral sacroiliac joint full thread hollow screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203059886U true CN203059886U (en) | 2013-07-17 |
Family
ID=48758717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220665970 Expired - Lifetime CN203059886U (en) | 2012-12-06 | 2012-12-06 | Cross bilateral sacroiliac joint full thread hollow screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203059886U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102961180A (en) * | 2012-12-06 | 2013-03-13 | 唐佩福 | Full-thread hollow screw stretching over bilateral sacroiliac joints |
-
2012
- 2012-12-06 CN CN 201220665970 patent/CN203059886U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102961180A (en) * | 2012-12-06 | 2013-03-13 | 唐佩福 | Full-thread hollow screw stretching over bilateral sacroiliac joints |
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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: 20130717 |
|
| CX01 | Expiry of patent term |