CN203183019U - Sacroiliac internal fixing screw - Google Patents
Sacroiliac internal fixing screw Download PDFInfo
- Publication number
- CN203183019U CN203183019U CN 201320233485 CN201320233485U CN203183019U CN 203183019 U CN203183019 U CN 203183019U CN 201320233485 CN201320233485 CN 201320233485 CN 201320233485 U CN201320233485 U CN 201320233485U CN 203183019 U CN203183019 U CN 203183019U
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- CN
- China
- Prior art keywords
- bolt
- sacroiliac
- fixing screw
- sacrum
- internal fixing
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Abstract
The utility model relates to a sacroiliac internal fixing screw, belonging to the technical field of bone surgery medical apparatuses and instruments. The sacroiliac internal fixing screw comprises a bolt and a nut. The bolt comprises a body part and a tail part which is connected with one end of the body part. The other end of the body part is connected with the nut. The sacroiliac internal fixing screw is characterized in that the sacroiliac internal fixing screw additionally comprises an expansion pipe and a gasket which are sheathed on the bolt, and the expansion pipe and the gasket are integrally connected; and the body part of the bolt is a fully-threaded structure and is fit with the inner wall thread of the expansion pipe and the female thread of the nut, the tail part of the bolt is conical, and a longitudinal cutting is arranged on the expansion pipe close to the tail part of the bolt. By using the sacroiliac internal fixing screw, a sacrum can be effectively fixed, the operation is simple, the surgery time is short, the inner fixing screw is not apt to get loose after the surgery, the healing of a fracture is positively promoted and the operation of taking out the screw at a later stage is facilitated. The sacroiliac internal fixing screw can be widely used for treating fractures at different parts of the sacrum and especially has very great advantages in the treatment of the fractures in the region II of the sacrum.
Description
Technical field
This utility model relates to technical field of medical instruments, is a kind of implant specifically, particularly relates to a kind of internal fixation screw for the treatment of fracture of the sacrum.
Background technology
The incidence rate of fracture of the sacrum constantly increases along with increasing of high-energy such as large-scale vehicle accident damage in recent years, and its treatment more and more is subjected to clinical orthopaedics doctor's attention.The fracture of the sacrum damage is serious, be generally multiple injuries, because rumpbone peripheral vessels, nervous tissue enrich, fracture usually causes massive hemorrhage and nervous symptoms, severe patient causes losing blood property, paraplegia, so fracture of the sacrum is handled in early days timely to reducing mortality of crucial importance, and is conducive to further diagnosis and treatment of later stage.Along with surgical technic fast development and patient to improving constantly of requiring of quality of life, the active and effective treatment that undergos surgery is accepted gradually.Sacroiliac screw fixedly is that the clinical centrality that meets biomechanics is most fixed at present.But sacroiliac screw is fixing the patient is put nail specification requirement height, misoperation easy damaged sacral nerves, cauda equina nerve or contiguous blood vessel, need to go repeatedly X line perspective in the art, patient and patient will accept a large amount of rays, and sacroiliac screw can not be used for III district fracture of the sacrum.Has the important clinical meaning so study a kind of novel, more stabilizing effective fracture of the sacrum internal fixation system.
In early-stage Study, we adopt the fracture (I, II, III district fracture) of dimensional finite element method simulation rumpbone different parts, and a kind of sacrum ilium internal fixation screw simulation of adopting sacroiliac screw to reach design is voluntarily carried out internal fixation and come relatively to the fixing effect (being stress distribution and displacement situation) of fracture of the sacrum.We find that the sacrum ilium internal fixation screw of design is little than the sacroiliac screw displacement voluntarily, and stability is high.
The utility model content
This utility model aims to provide a kind of novel internal fixation screw for the treatment of fracture of the sacrum, this sacrum ilium internal fixation screw can effectively be fixed rumpbone, can effectively solve the internal fixation hold deficiency that the conventional screw that uses exists in the prior art and fix loosening easily problem.
This utility model is by the following technical solutions:
A kind of sacrum ilium internal fixation screw, comprise screw bolt and nut, described bolt comprises body and the afterbody that is attached thereto, the described body other end is connected with described nut, it is characterized in that: described sacrum ilium internal fixation screw also comprises expansion tube and the pad that is sleeved on the described bolt, and described expansion tube is connected one with pad.
Described bolt body is the full thread structure, matches with the inner thread of described expansion tube and the female thread of described nut, and described bolt tail is taper, and described expansion tube offers vertical grooving near described bolt tail.
A kind of sacrum ilium internal fixation screw provided by the utility model has following advantage:
Fixedly fracture of the sacrum is easy and simple to handle for the sacrum ilium internal fixation screw that this utility model provides, laborsaving and fixing more firm, match between the female thread of nut and expansion tube and the bolt body surface external screw thread, only need pass through fastening nut in the operating process, can make between expansion tube and the screw rod and form friction self-locking, reach fixed effect.
Description of drawings
Fig. 1 is the structural representation of an embodiment of this utility model sacrum ilium internal fixation screw
Fig. 2 is the cutaway view of an embodiment of this utility model sacrum ilium internal fixation screw
The specific embodiment
What this utility model provided as shown in Figure 1 and Figure 2 is a kind of sacrum ilium internal fixation screw that is used for the treatment of fracture of the sacrum, comprise bolt 1 and nut 2, described bolt comprises body 3 and the afterbody 4 that is attached thereto, described body 3 other ends are connected with described nut 2, described sacrum ilium internal fixation screw also comprises expansion tube 5 and the pad 6 that is sleeved on the described bolt 1, and described expansion tube 5 is connected one with pad 6.
Described bolt body 3 is the full thread structure, matches with the inner thread of described expansion tube 5 and the female thread of described nut 2, and described bolt tail 4 is taper, and described expansion tube 5 offers vertical grooving 7 near described bolt tail 4.
The operation principle of a kind of sacrum ilium internal fixation screw that this utility model provides is: this sacrum ilium internal fixation screw is put into sacroiliac through hole that hollow boring bit bores, make bolt outwards mobile with the kit fastening nut, by moving axially of screw thread bolt tail is moved, thereby the outer peripheral face at expansion tube becomes very big normal pressure, make sacroiliac, expansion tube and bolt tail form friction self-locking, and then reach firm fixation.
Operative process is: behind the general anesthesia, ring damage or fracture of acetabulum person before being combined change the ventricumbent position into after can getting dorsal position row open reduction steel plate internal fixation earlier; As encircling fixedly person before need not, the patient directly gets the ventricumbent position.Should use C type arm X line to position clear and definite sacral anteroposterior diameter and sacrum hole, canalis sacralis position and labelling before the art.Select closed reduction or open reduction as the case may be.Operative incision adopts the stringer otch, determine cutting part and length according to the fracture of the sacrum situation, appear surgical field of view, fracture of the sacrum to displacement carries out reduction, the card that sacral nerves is arranged is pressed, the need of damage reduce pressure, under the monitoring of C arm X line machine, 1/3 place, middle back in anterior superior iliac spine and posterior superior iliac spine line is entry point, be that guide pin is fixed by Kirschner wire, satisfied back, position uses hollow boring bit to hole, and selects for use this utility model sacrum ilium internal fixation screw to fix, the satisfied afterflush wound of perspective position, place drainage tube, sew up each layer successively, avoid residual cavity.
In a word, use this sacrum ilium internal fixation screw effectively to fix rumpbone, simple to operate, operating time is short, and the postoperative internal fixation screw is difficult for loosening, actively promotes the healing of fracture, and is convenient to the taking-up in later stage.This sacrum ilium internal fixation screw can be widely used in treating the fracture of rumpbone different parts, and the fracture tool for the treatment of rumpbone II district especially clinically has great advantage.
Claims (2)
1. sacrum ilium internal fixation screw, comprise screw bolt and nut, described bolt comprises body and the afterbody that is attached thereto, the described body other end is connected with described nut, it is characterized in that: described sacrum ilium internal fixation screw also comprises expansion tube and the pad that is sleeved on the described bolt, and described expansion tube is connected one with pad.
2. a kind of sacrum ilium internal fixation screw according to claim 1, it is characterized in that: described bolt body is the full thread structure, match with the inner thread of described expansion tube and the female thread of described nut, described bolt tail is taper, and described expansion tube offers vertical grooving near described bolt tail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320233485 CN203183019U (en) | 2013-04-19 | 2013-04-19 | Sacroiliac internal fixing screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320233485 CN203183019U (en) | 2013-04-19 | 2013-04-19 | Sacroiliac internal fixing screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203183019U true CN203183019U (en) | 2013-09-11 |
Family
ID=49099925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320233485 Expired - Fee Related CN203183019U (en) | 2013-04-19 | 2013-04-19 | Sacroiliac internal fixing screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203183019U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3525697A4 (en) * | 2016-10-15 | 2020-06-17 | Sen, Ramesh Kumar | Acetabular compression plate with dual cortical fixation and method of fixing thereof |
-
2013
- 2013-04-19 CN CN 201320233485 patent/CN203183019U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3525697A4 (en) * | 2016-10-15 | 2020-06-17 | Sen, Ramesh Kumar | Acetabular compression plate with dual cortical fixation and method of fixing thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130911 Termination date: 20140419 |