CN2875349Y - Micro-traumatic sliding screw - Google Patents
Micro-traumatic sliding screw Download PDFInfo
- Publication number
- CN2875349Y CN2875349Y CN 200620070441 CN200620070441U CN2875349Y CN 2875349 Y CN2875349 Y CN 2875349Y CN 200620070441 CN200620070441 CN 200620070441 CN 200620070441 U CN200620070441 U CN 200620070441U CN 2875349 Y CN2875349 Y CN 2875349Y
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- CN
- China
- Prior art keywords
- screw
- sliding
- inner bolt
- pinning
- swivel nut
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model relates to an inner fixed implant of fracture treatment, in particular to a micro-trauma sliding screw which is applicable to the surgical treatment of femoral neck fracture. The structure consists of an inner screw, a sliding thread insert and a pressure locking nail, wherein the sliding thread insert is arranged outside of the inner screw, the pressure locking nail is arranged on the upper part of the inner screw, while the inner screw is cannulated cancellous screw with openings at both ends; the inner screw is provided with a nail bar, both sides of the nail bar are equipped with parallel sliding cut surfaces, the upper part of the nail bar is equipped with an inner thread to cooperate with the pressure locking nail, the lower part of the nail bar is equipped with a thread, while the sliding thread insert is cannulated with openings at both ends, the surface is provided with a self-tapping thread, the inner wall of the lower end of the sliding thread insert is provided with two convex platforms to inosculate with the parallel sliding cut surfaces of the nail bar of the inner screw, and when the sliding thread insert rotates to the inosculation between the convex platforms and the sliding cut surfaces, the sliding thread insert can cover the outside of the inner screw. The upper part of the sliding thread insert is equipped with a positioning hole of pressure locking nail, which is clippedly connected with the pressure locking nail on the inner screw. The pressure locking nail is provided with a threaded rod, the threaded rod is provided with a screw, while the head of the threaded rod is provided with a positioning cap nut.
Description
Technical field
This utility model relates to a kind of internal fixation implant of fractures, especially is applicable to the minimal access sliding screw of fracture of femoral neck operative treatment.
Background technology
The internal fixation implant of the fracture of femoral neck treatment of generally acknowledging at present, has Kirschner wire, bone screw, hollow spike, gooseneck boom nail, angle steel plate and artificial joint.Kirschner wire, bone screw and hollow spike are fixed with temporary transient by the location of Kirschner wire, fracture are resetted fixing by many nails internal fixation; The gooseneck boom nail is made up of geese-head steel plates, lag screw, power screw, by geese-head steel plates the neck of femur of fracture is fixed, and pressurizes by lag screw, by bone screw geese-head steel plates is fixed on the backbone simultaneously.But Kirschner wire, bone screw and hollow spike is easily fixing because fixing not firm bone does not connect and the femur head necrosis of causing, gooseneck boom nail, angle steel plate are because self structure and fixed needs, in operation process, can cause than macrolesion femur spongiosa, femoral head and femoral shaft, cause the wound of femur head necrosis and femoral shaft easily, be unfavorable for fractures; The prosthetic replacement is because to the requirement of patient's has age, and surgical technic is had relatively high expectations simultaneously, and is clinical less in order to the treatment fracture of femoral neck.
Summary of the invention
This utility model purpose is to fix not firm bone does not connect and the femur head necrosis of easily causing in order to overcome the existing fracture of femoral neck operative treatment implants (1) that is applicable to, (2) cause two bigger big weak points of wound, a kind of minimal access sliding screw is provided, this screw can not only firmly be fixed the neck of femur of fracture, can realize the less wound in the operation simultaneously.
Minimal access sliding screw is to take following technical scheme to realize: the minimal access sliding screw structure is by inner bolt, slip swivel nut and pressurization pinning three parts are formed, the slip swivel nut is sleeved on the inner bolt outside, the pressurization pinning is contained in the inner bolt upper end, and whole minimal access sliding screw can select for use rustless steel or titanium alloy material to constitute.Inner bolt is a two open ends hollow cancellous bone screw, inner bolt has the nail bar, and nail bar both sides are provided with parallel sliding tangent plane (sliding surface), and nail bar top is provided with female thread and matches with the pressurization pinning, nail bar bottom is provided with bone thread, and the bone thread bottom is provided with the self tapping cutting edge.The slip swivel nut is a two open ends hollow, the surface is provided with tapping screw thread, slip swivel nut lower end inwall has two boss that coincide with inner bolt nail bar parallel sliding tangent plane, the slip swivel nut turns to when boss and sliding section coincide and can overlap to inner bolt, play the effect that anti-sliding stop swivel nut and inner bolt rotate, slip swivel nut top is provided with pressurization pinning locating hole, is connected to pressurization pinning on the inner bolt with fastening.The pressurization pinning has screw rod, and screw rod is provided with screw thread, and screw head is provided with positioning screw cap, is provided with hexagon ring in the positioning screw cap, is used to tighten the pressurization pinning, and the pressurization pinning is by being screwed at inner bolt nail bar top.
During operation, inserting Kirschner wire below greater trochanter temporarily resets fixing, and sensing femoral head center, squeeze into the inner bolt of minimal access sliding screw by apparatus, the inner bolt end of thread points to femoral head, and inner bolt nail bar passes the femoral neck bone broken line, the slip swivel nut is entered from femoral greater trochanter again, twist and be enclosed within on the inner bolt screw rod swivel nut end of thread sensing femoral greater trochanter.Extract Kirschner wire afterwards out, the pinning that will pressurize is locked at the inner bolt outer end, by operating theater instruments the slip swivel nut is screwed onto the precalculated position together with inner bolt.
The beneficial effects of the utility model are: can advance nail and fixing with very little wound in the operation process, and small to spongy bone, femoral shaft and fracture site wound, prevent that the femur head necrosis and the femoral shaft that cause because of operation from suffering serious secondary wound; Simultaneously, utilize the screw thread of inner bolt and slip swivel nut respectively, the fracture line two ends are all fixed, thereby the healing of fracture site has been accelerated at secure fracture of femoral neck position, less greatly patient's slight illness.
Description of drawings
The utility model is described in further detail below with reference to accompanying drawing.
Fig. 1 is the minimal access sliding screw structural representation.
Fig. 2 is the pressurization pinning sketch map of minimal access sliding screw.
Fig. 3 is the slip screw bushing structure sketch map of minimal access sliding screw.
Fig. 4 is the slip swivel nut schematic top plan view of minimal access sliding screw.
Fig. 5 is the inner bolt structural representation of minimal access sliding screw.
Fig. 6 is the inner bolt A-A cutaway view of minimal access sliding screw.
The specific embodiment
With reference to accompanying drawing 1～6, the minimal access sliding screw structure is by inner bolt 3, slip swivel nut 2 and pressurization pinning 1 three parts are formed, slip swivel nut 2 is sleeved on inner bolt 3 outsides, pressurization pinning 1 is contained in inner bolt 3 upper ends, the inner bolt of whole minimal access sliding screw, slip swivel nut and pressurization pinning select for use rustless steel or titanium alloy material to constitute.Inner bolt 3 is a two open ends hollow cancellous bone screw, inner bolt has nail bar 3-2, nail bar 3-2 both sides are provided with parallel sliding tangent plane 3-3 (sliding surface), and nail bar 3-2 top is provided with female thread 3-1 and matches with pressurization pinning 1, and nail bar 3-2 bottom is provided with bone thread 3-4.The bone thread 3-4 bottom of inner bolt nail bar 3-2 is provided with the self tapping cutting edge.Slip swivel nut 2 is a two open ends hollow, the surface is provided with tapping screw thread 2-3, slip swivel nut 2 lower end inwalls have two boss 2-4 that coincide with inner bolt nail bar parallel sliding tangent plane, slip swivel nut 2 turns to when boss 2-4 and parallel sliding tangent plane 3-3 (sliding surface) coincide and can overlap to inner bolt 3, play the effect that anti-sliding stop swivel nut 2 and inner bolt 3 rotate, slip swivel nut 2 tops are provided with pressurization pinning locating hole 2-1, are connected to pressurization pinning 1 on the inner bolt with fastening.Pressurization pinning 1 has screw rod 1-3, screw rod 1-3 is provided with screw thread, screw rod 1-3 head is provided with positioning screw cap 1-2, be provided with hexagon ring 1-1 in the positioning screw cap 1-2, be used to tighten pressurization pinning 1, pressurization pinning 1 is by being screwed at inner bolt nail bar 3-2 top, and the positioning screw cap 1-2 diameter of pressurization pinning nail is slightly less than pressurization pinning locating hole 2-1 to realize the location.
Claims (5)
1, a kind of minimal access sliding screw, it is characterized in that structure is by inner bolt, slip swivel nut and pressurization pinning three parts are formed, the slip swivel nut is sleeved on the inner bolt outside, the pressurization pinning is contained in the inner bolt upper end, inner bolt is a two open ends hollow cancellous bone screw, inner bolt has the nail bar, nail bar both sides are provided with the parallel sliding tangent plane, nail bar top is provided with female thread and matches with the pressurization pinning, nail bar bottom is provided with bone thread, the slip swivel nut is a two open ends hollow, the surface is provided with tapping screw thread, and slip swivel nut lower end inwall has two boss that coincide with inner bolt nail bar parallel sliding tangent plane, and the slip swivel nut turns to boss and can overlap to inner bolt when identical with sliding section.
2, minimal access sliding screw according to claim 1 is characterized in that inner bolt, and slip swivel nut and pressurization pinning select for use rustless steel or titanium alloy material to constitute.
3, minimal access sliding screw according to claim 1 is characterized in that the bone thread bottom of inner bolt nail bar is provided with the self tapping cutting edge.
4, minimal access sliding screw according to claim 1, the pinning that it is characterized in that pressurizeing has screw rod, and screw rod is provided with screw thread, and screw head is provided with positioning screw cap, is provided with hexagon ring in the positioning screw cap.
5, minimal access sliding screw according to claim 1, the swivel nut top that it is characterized in that sliding are provided with pressurization pinning locating hole, are connected to pressurization pinning on the inner bolt with fastening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620070441 CN2875349Y (en) | 2006-03-21 | 2006-03-21 | Micro-traumatic sliding screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620070441 CN2875349Y (en) | 2006-03-21 | 2006-03-21 | Micro-traumatic sliding screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2875349Y true CN2875349Y (en) | 2007-03-07 |
Family
ID=37818593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620070441 Expired - Lifetime CN2875349Y (en) | 2006-03-21 | 2006-03-21 | Micro-traumatic sliding screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2875349Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105193489A (en) * | 2015-09-18 | 2015-12-30 | 山东康盛医疗器械有限公司 | Dynamic-pressurizing-locked bone screw and use method thereof |
| CN106974714A (en) * | 2017-03-15 | 2017-07-25 | 中山市世医堂医疗器械有限公司 | A kind of minimally invasive spine internal fixation system |
-
2006
- 2006-03-21 CN CN 200620070441 patent/CN2875349Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105193489A (en) * | 2015-09-18 | 2015-12-30 | 山东康盛医疗器械有限公司 | Dynamic-pressurizing-locked bone screw and use method thereof |
| CN106974714A (en) * | 2017-03-15 | 2017-07-25 | 中山市世医堂医疗器械有限公司 | A kind of minimally invasive spine internal fixation system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: YANG LIBO Free format text: FORMER OWNER: MO LISI Effective date: 20121023 Free format text: FORMER OWNER: YANG LIBO Effective date: 20121023 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 213022 CHANGZHOU, JIANGSU PROVINCE TO: 223022 CHANGZHOU, JIANGSU PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20121023 Address after: 223022 Changzhou Kang Hui medical instruments Co., Ltd., 11 Changjiang North Road, Xinbei District, Jiangsu, Changzhou Patentee after: Yang Libo Address before: 213022 Changzhou Kang Hui medical instruments Co., Ltd., 1-8 Tian Tian Shan Road, Xinbei District, Jiangsu, Changzhou Patentee before: Mo Lisi Patentee before: Yang Libo |
|
| ASS | Succession or assignment of patent right |
Owner name: KANGHUI MEDICAL INNOVATION CO., LTD. Free format text: FORMER OWNER: YANG LIBO Effective date: 20121214 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20121214 Address after: 223022 No. 11 Changjiang North Road, Xinbei District, Jiangsu, Changzhou Patentee after: Kanghui Medical Innovation Co., Ltd. Address before: 223022 Changzhou Kang Hui medical instruments Co., Ltd., 11 Changjiang North Road, Xinbei District, Jiangsu, Changzhou Patentee before: Yang Libo |
|
| CX01 | Expiry of patent term |
Granted publication date: 20070307 |
|
| EXPY | Termination of patent right or utility model |