CN202843773U - Sacrum primary and secondary hollow forcing screw - Google Patents
Sacrum primary and secondary hollow forcing screw Download PDFInfo
- Publication number
- CN202843773U CN202843773U CN 201220554584 CN201220554584U CN202843773U CN 202843773 U CN202843773 U CN 202843773U CN 201220554584 CN201220554584 CN 201220554584 CN 201220554584 U CN201220554584 U CN 201220554584U CN 202843773 U CN202843773 U CN 202843773U
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- nail
- screw
- primary
- hollow
- female
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Abstract
The utility model provides sacrum primary and secondary hollow forcing screws which are used for being fixedly implanted into a human body vertical and unstable pelvis surrounding the injury after the fracture of the pelvis to solve the problems that a lag screw which is regularly used in the existing technology is not enough in holding force for fixing fracture and the fixing is easy to loosen. The sacrum primary and secondary hollow forcing screws comprise a primary screw, a secondary screw and a pair of spacers which are arranged at two ends of the screw. Outer threads are formed in the front section of the primary screw, inner threads are formed in the front section of the secondary screw and the primary screw matches with the secondary screw in a threaded mode. Hollow bores are arranged in the center of the primary screw and the center of the secondary screw and the hollow bores are through holes. Due to the adoption of a design of a minimally invasive idea and hollow guide devices, the sacrum primary and secondary hollow forcing screws shorten surgery time and reduce damage to surrounding tissues. The sacrum primary and secondary hollow forcing screws are made of titanium alloy, good in tissue compatibility, light in weight, good in intensity and various in size and model so as to be used for various pelvises. The surgery is convenient to operate, precise in location, stable in inner fixing and reliable in pressing. The fixed material is not easy to drop and loosen after the surgery and convenient to take out in later period.
Description
Technical field
This utility model belongs to medical apparatus and instruments, particularly a kind of internal fixation implantation instrument for the treatment of ring damage behind the human body vertical instability fracture of pelvis.
Background technology
Adopted steel plate, sacrum rod and lag screw to fix for ring damage behind the vertical instability fracture of pelvis in the past, Clinical Practice, the fixing damage of steel plate is large, in the implantation process of screw, accidentally injure easily the damage of nerve of sacral plexus and venous plexus, cause corresponding function obstacle and paraesthesia, operative hemorrhage appears in injured blood vessel to be increased, hemorrhage herein, anthemorrhagic difficulty prolongs operating time; In adopting the sacrum rod fixation procedure because not adopting the theory of Wicresoft, damage to ilium and surrounding soft tissue is larger, the screw designs that adopts general industry to use at the two ends of rod, so that instrument supports the use difficulty in fixation procedure, and in the taking-up process in later stage, cause the taking-up instrument not mate and prolong operating time and damage strengthens, even can not take out; The conventional lag screw that uses, there is not hollow design, so that in implantation process accurate poor location, secondary is implanted and is strengthened damage on every side, the screw thread of common lag screw mainly concentrates on the leading portion of screw rod, and strength mainly concentrates on the interlock position of screw thread and offside ilium, because ilium is spongy bone, often cause hold to be not enough to fixing fracture, or fixing loosening easily.
The utility model content
The purpose of this utility model provides a kind of for fixing the hollow forcing screw of rumpbone primary and secondary of implanting in the ring damage behind the human body vertical instability fracture of pelvis, is not enough to fix fracture and the fixing problem of becoming flexible easily to solve the hold that the conventional lag screw that uses exists in the prior art.
For achieving the above object, this utility model is by the following technical solutions:
The hollow forcing screw of a kind of rumpbone primary and secondary is comprised of son nail, female nail and a pair of pad that is arranged on the screw two ends, the leading portion band external screw thread of described son nail, the leading portion band female thread of female nail, son nail and female oncomelania stricture of vagina cooperate, and the center of described son nail and female nail is provided with hollow hole, and described hollow hole is through hole.
The rearward end of described son nail is provided with hemispheric son nail nail tail, and the rearward end of described female nail is provided with hemispheric female nail nail tail, and the centre of son nail nail tail and female nail nail tail is provided with the interior six side's grooves that cave inward; The top of described two pads is the sphere band of concave shaped sphere with the junction of son nail nail tail and female nail nail tail, and the outside internal ring of pad forms banded depression ring, is that the hemispherical profile is to corresponding with son nail nail tail and female nail nail tail.
Inwardly be provided with the Mus detent projection on the described pad.
The tooth of described Mus detent projection is long to be 1mm～1.5mm, and distance is 2mm between adjacent two Mus detent projection.
The diameter of described hollow hole is 2.0～2.5mm.
Described son nail, female nail and pad are made by titanium alloy material.
The beneficial effects of the utility model are:
Fix by this screw when the ring damage needs fixedly behind the vertical instability fracture of pelvis, at flat sacrum horizontal plane rumpbone rear side, the ilium rear wing is fixed in both sides, adopt in advance percutaneous guiding of guide pin, strengthened the accuracy in the implantation process after the fluoroscopic machine perspective, the sclerotin that the boring of minimizing test of many times causes and the damage of surrounding tissue, guide pin is implanted definite errorless tailing edge guide pin direction and is holed with core drill, and enlarge the bone road with screw tap, then along guide pin direction pedicle screw, reduced operating time and to the damage of surrounding soft tissue; The fixing stress point of this screw designs mainly concentrates on the ilium of both sides, and the hold of screw is done itself at the combination spiral shell, avoids the damage of ilium and the drawback not in place of pressurizeing; Should fixingly avoid damaging the damage of nerve of sacral plexus and PeV clump without rumpbone, reduce the amount of bleeding of operation, prevent that delayed ischemic neurological deficits and paraesthesia from appearring in the later stage; The nail tail adopts hollow interior six sides design, and the special-purpose grape of hollow orthopaedics all has at situation of all-level hospitals, the convenient use, and avoid screw tail stripped thread, for preparation work is carried out in the later stage taking-up; Employing has been strengthened the stress surface of ilium with the pad of Mus tooth, prevents from damaging ilium periosteum and screw nail tail and is absorbed in the ilium, and callus covers when avoiding the later stage to take out screw, and takes out difficulty.This screw Wicresoft theory design, the hollow guiding device shortens operating time, reduces the damage to surrounding tissue.By the titanium alloy manufacturing, titanium alloy is common used material in the present internal fixation system, and histocompatibility is good, and quality is light, and intensity is good.Different large ting models are arranged, can be for the pelvis of different sizes.Operation technique is simple, accurate positioning, and interior fixing-stable, pressurization is reliable, and the postoperative inside-fixture is not easy to come off, becomes flexible, and is convenient to the taking-up in later stage.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the side view of Fig. 1.
The specific embodiment
Below in conjunction with accompanying drawing this utility model is described further.
As shown in Figure 1, the hollow forcing screw of rumpbone primary and secondary of the present utility model is comprised of son nail 1, female nail 4 and a pair of pad 2 that is arranged on the screw two ends, the leading portion band external screw thread of son nail 1, the leading portion band female thread of female nail 4, son nail 1 and female nail 4 threaded engagement, in use the screw plus-pressure mainly concentrates on the screw thread, avoids screw hold in the past mainly to concentrate on ilium and causes fixing unreliable and easy loosening drawback, and strengthened its hold and stability; The center of son nail 1 and female nail 4 is provided with hollow hole 3, and hollow hole 3 is through hole, can implant guide pin by percutaneous, along guide pin direction pedicle screw, implements Micro-operation, and accurately the damage to surrounding tissue is reduced in the location.
As depicted in figs. 1 and 2, the rearward end of son nail 1 is provided with hemispheric son nail nail tail 11, and the rearward end of female nail 4 is provided with hemispheric female nail nail tail 41, and the centre of son nail nail tail 11 and female nail nail tail 41 is provided with the interior six side's grooves 5 that cave inward; The top of two pads 2 is the sphere band of concave shaped sphere with the junction of son nail nail tail 11 and female nail nail tail 41, and pad 2 outside internal ring form banded depression ring, is that the hemispherical profile is to corresponding with son nail nail tail 11 and female nail nail tail 41.
Inwardly be provided with Mus detent projection 6 on the pad 2, the tooth of Mus detent projection 6 is long to be 1mm～1.5mm, and distance is 2mm between adjacent two Mus detent projection (6).Strengthened stress surface, the periosteal tissue under the less damage pad is avoided nut to be absorbed in ilium because of excessive damage and the nail tail to ilium of pressure, and is prevented that callus covers when later stage taking-up screw, and takes out difficulty.
The diameter of hollow hole 3 is 2.0～2.5mm.
Son nail 1, female nail 4 and pad 2 are made by titanium alloy material.The histocompatibility of titanium alloy is good, and quality is light, and intensity is good.Different large ting models are arranged, can be for the pelvis of different sizes.
Claims (6)
1. hollow forcing screw of rumpbone primary and secondary, it is characterized in that: formed by son nail (1), female nail (4) and a pair of pad (2) that is arranged on the screw two ends, the leading portion band external screw thread of described son nail (1), the leading portion band female thread of female nail (4), son nail (1) and female nail (4) threaded engagement, the center of described son nail (1) and female nail (4) is provided with hollow hole (3), and described hollow hole (3) is through hole.
2. the hollow forcing screw of rumpbone primary and secondary as claimed in claim 1, it is characterized in that: the rearward end of described son nail (1) is provided with hemispheric son nail nail tail (11), the rearward end of described female nail (4) is provided with hemispheric female nail nail tail (41), and the centre of son nail nail tail (11) and female nail nail tail (41) is provided with the interior six side's grooves (5) that cave inward; The top of described two pads (2) is the sphere band of concave shaped sphere with the junction of son nail nail tail (11) and female nail nail tail (41), the outside internal ring of pad (2) forms banded depression ring, is that the hemispherical profile is to corresponding with son nail nail tail (11) and female nail nail tail (41).
3. the hollow forcing screw of rumpbone primary and secondary as claimed in claim 2 is characterized in that: inwardly be provided with Mus detent projection (6) on the described pad (2).
4. the hollow forcing screw of rumpbone primary and secondary as claimed in claim 3 is characterized in that: the tooth of described Mus detent projection (6) is long to be 1mm～1.5mm, and distance is 2mm between adjacent two Mus detent projection (6).
5. the hollow forcing screw of rumpbone primary and secondary as claimed in claim 1, it is characterized in that: the diameter of described hollow hole (3) is 2.0～2.5mm.
6. such as the hollow forcing screw of the arbitrary described rumpbone primary and secondary of claim 1 to 5, it is characterized in that: described son nail (1), female nail (4) and pad (2) are made by titanium alloy material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220554584 CN202843773U (en) | 2012-10-26 | 2012-10-26 | Sacrum primary and secondary hollow forcing screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220554584 CN202843773U (en) | 2012-10-26 | 2012-10-26 | Sacrum primary and secondary hollow forcing screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202843773U true CN202843773U (en) | 2013-04-03 |
Family
ID=47975022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220554584 Expired - Fee Related CN202843773U (en) | 2012-10-26 | 2012-10-26 | Sacrum primary and secondary hollow forcing screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202843773U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102871721A (en) * | 2012-10-26 | 2013-01-16 | 王永红 | Sacrum female and male hollow pressurizing screw |
| WO2015175376A1 (en) * | 2014-05-12 | 2015-11-19 | DePuy Synthes Products, Inc. | Sacral fixation system |
| US10064670B2 (en) | 2014-05-12 | 2018-09-04 | DePuy Synthes Products, Inc. | Sacral fixation system |
| TWI635843B (en) * | 2017-10-12 | 2018-09-21 | 財團法人金屬工業研究發展中心 | Two-stage bone nail device |
| US11553948B2 (en) | 2021-05-20 | 2023-01-17 | University Of Utah Research Foundation | Bone fixation devices, systems, and methods |
-
2012
- 2012-10-26 CN CN 201220554584 patent/CN202843773U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102871721A (en) * | 2012-10-26 | 2013-01-16 | 王永红 | Sacrum female and male hollow pressurizing screw |
| WO2015175376A1 (en) * | 2014-05-12 | 2015-11-19 | DePuy Synthes Products, Inc. | Sacral fixation system |
| US9788862B2 (en) | 2014-05-12 | 2017-10-17 | DePuy Synthes Products, Inc. | Sacral fixation system |
| US10064670B2 (en) | 2014-05-12 | 2018-09-04 | DePuy Synthes Products, Inc. | Sacral fixation system |
| TWI635843B (en) * | 2017-10-12 | 2018-09-21 | 財團法人金屬工業研究發展中心 | Two-stage bone nail device |
| US11553948B2 (en) | 2021-05-20 | 2023-01-17 | University Of Utah Research Foundation | Bone fixation devices, systems, and methods |
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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: 20130403 Termination date: 20141026 |
|
| EXPY | Termination of patent right or utility model |