CN105167835A - Locking screw - Google Patents
Locking screw Download PDFInfo
- Publication number
- CN105167835A CN105167835A CN201410847227.XA CN201410847227A CN105167835A CN 105167835 A CN105167835 A CN 105167835A CN 201410847227 A CN201410847227 A CN 201410847227A CN 105167835 A CN105167835 A CN 105167835A
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- CN
- China
- Prior art keywords
- screw
- lead
- nail
- head
- screw thread
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 claims description 4
- 210000000988 bone and bone Anatomy 0.000 abstract description 9
- 239000008280 blood Substances 0.000 abstract description 5
- 210000004369 blood Anatomy 0.000 abstract description 5
- 230000008468 bone growth Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 230000035876 healing Effects 0.000 abstract 1
- 208000010392 Bone Fractures Diseases 0.000 description 11
- 238000006073 displacement reaction Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000000977 initiatory effect Effects 0.000 description 3
- 101800004660 Aldosterone secretion inhibitory factor Proteins 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 206010025482 malaise Diseases 0.000 description 1
- 230000035479 physiological effects, processes and functions Effects 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Surgical Instruments (AREA)
Abstract
The invention discloses a locking screw which is provided with a variable lead screw cap, wherein the thread of the screw cap is a double-end taper variable-lead thread. The lead enlarges from a small number to a large number and then reduces from the large number. A starting lead is smaller than an ending lead. The average lead of the thread of the screw cap is equal with the average value of the starting lead and the ending lead. The average lead of the thread of the screw cap is equal with the lead of a double-end taper threaded hole and a shank screw of a locking board. The locking screw has functions of eliminating an endplay gap of the screw and the threaded hole of the locking board in the axial direction of the screw, enlarging the self-locking force of the screw for preventing loosening, ensuring a necessary stability in locking, and clinically ensuring high accuracy in fracture reduction. The locking screw further has advantages of ensuring accurate resetting of a fracture part in treating unstable fracture, realizing stable fixation, keeping high blood transport effect of the bone, and increasing bone growth and healing speed at the fracture part.
Description
Technical field
The invention belongs to technical field of medical instruments, specifically a kind of lock screw with the Changeable Lead screw thread head of a nail.
Background technology
Locking steel plate screw internal fixation system is the bone fracture internal fixing device that current orthopaedics the most often uses.To send out rate higher for the disease of unstable fracture in recent years, common are instability mode os pelvicum fracture, instability mode radius far-end fracture etc. and have very high sickness rate clinically, stability and the reset accuracy of the existing locking internal fixation system used also are weak, and cause operating difficulty to increase.According to the principle of AO/ASIF, Fracture internal fixaiion builds on a kind for the treatment of comprehensively on the accurate reduction of the fracture, the stable blood fortune of fixing, retaining bone as far as possible, early function sexual activity basis.Consider the stability of the accurate and internal fixtion structure that unstable fracture resets, prevent internal fixtion poor stability from causing fixing unsceptered, avoid bringing unnecessary misery to patient.As there is above-mentioned hidden danger, often needing again to perform the operation, not only giving patient at physiology and causing burden psychologically, and also bring heavy financial burden to family.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of lock screw with the Changeable Lead screw thread head of a nail.
The present invention is the technical scheme that improvement the problems of the prior art propose:
Lock screw of the present invention, comprise the head of a nail and nail bar, the head of a nail and nail bar arrange again head of a nail screw thread and nail bar screw thread respectively, corresponding threaded holes on head of a nail screw thread and lockplate closes, head of a nail screw thread is double end tapering Changeable Lead screw thread, the helical pitch of head of a nail screw thread is changed from small to big to head of a nail direction from nail bar, and namely the initial helical pitch of head of a nail screw thread is less than termination helical pitch.
The present invention can also adopt following technical measures:
The mean lead of described head of a nail screw thread equals initial helical pitch and stops the meansigma methods of helical pitch, equal with the helical pitch of following closely bar screw thread with the double end tapered screw hole of lockplate.
Accompanying drawing explanation
Fig. 1 is the structural representation of lock screw of the present invention.
Detailed description of the invention
Referring to drawings and Examples, the present invention will be described in detail.
In order to solve internal fixation system stability and the reset accuracy problems of unstable fracture, reduce operating difficulty.According to the principle of AO/ASIF, Fracture internal fixaiion builds on the accurate reduction of the fracture, the stable blood fortune of fixing, retaining bone as far as possible, consider the stability of the accurate and internal fixtion structure that unstable fracture resets, prevent internal fixtion poor stability from causing fixing unsceptered, take Changeable Lead design for lock screw head of a nail double end taper thread.
As shown in Figure 1, lock screw of the present invention, comprise the head of a nail 1 and nail bar 2, the head of a nail and nail bar arrange again head of a nail screw thread and nail bar screw thread respectively, corresponding threaded holes on head of a nail screw thread and lockplate closes, head of a nail screw thread is double end tapering Changeable Lead screw thread, and the helical pitch of head of a nail screw thread is changed from small to big to head of a nail direction from nail bar, and namely the initial helical pitch 1a of head of a nail screw thread is less than termination helical pitch 1b.Rotating lead change initiating terminal screw thread and clearing end by screw, to produce axial displacement poor.Eliminate screw and the lockplate screw thread play gap along screw axial, the self-lock force increasing screw prevents from loosening, and ensures the stability of locking internal fixtion necessity.
The mean lead of head of a nail screw thread equals initial helical pitch and stops the meansigma methods of helical pitch, equal with the helical pitch of following closely bar screw thread with the double end tapered screw hole of lockplate, shank of screw subordinate is made to follow closely the lower nail speed sync of speed and the head of a nail, ensure that the relative gap on lockplate and bone composition surface, remain the blood fortune on bone composition surface.
When the head of a nail screws in the screwed hole of lockplate, the lead of lead change initiating terminal is little, the speed that screw enters bone threaded holes is vertically slower, and the lead of lead change clearing end is large, screw enters the speed of bone threaded holes vertically, when screw rotates N circle, the axial displacement that lead change initiating terminal screw thread occurs is less than clearing end and produces axial displacement.Lockplate lead is fixed value, the displacement difference produced in screw lock process, and can eliminate screw and the lockplate screw thread play gap along screw axial, the self-lock force increasing screw prevents from loosening, and ensures the stability of locking internal fixtion necessity.The mean lead of head of a nail screw thread is equal with the helical pitch of following closely bar screw thread with the double end tapered screw hole of lockplate, makes shank of screw subordinate follow closely the lower nail speed sync of speed and the head of a nail, ensure that the relative gap on lockplate and bone composition surface, remains the blood fortune on bone composition surface.
Claims (2)
1. a lock screw, comprise the head of a nail and nail bar, the head of a nail and nail bar arrange again head of a nail screw thread and nail bar screw thread respectively, corresponding threaded holes on head of a nail screw thread and lockplate closes, it is characterized in that: head of a nail screw thread is double end tapering Changeable Lead screw thread, the helical pitch of head of a nail screw thread is changed from small to big to head of a nail direction from nail bar, and namely the initial helical pitch of head of a nail screw thread is less than termination helical pitch.
2. lock screw according to claim 1, is characterized in that: the mean lead of head of a nail screw thread equals initial helical pitch and stops the meansigma methods of helical pitch, equal with the helical pitch of following closely bar screw thread with the double end tapered screw hole of lockplate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410847227.XA CN105167835B (en) | 2014-12-31 | 2014-12-31 | Lock screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410847227.XA CN105167835B (en) | 2014-12-31 | 2014-12-31 | Lock screw |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105167835A true CN105167835A (en) | 2015-12-23 |
| CN105167835B CN105167835B (en) | 2019-02-15 |
Family
ID=54890634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410847227.XA Active CN105167835B (en) | 2014-12-31 | 2014-12-31 | Lock screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105167835B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108324357A (en) * | 2018-03-14 | 2018-07-27 | 熊鹰 | A kind of minimally invasive drift fixing bracket device |
| CN112901778A (en) * | 2021-01-13 | 2021-06-04 | 西安近代化学研究所 | End face sealing device for threaded connection part |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6306140B1 (en) * | 2001-01-17 | 2001-10-23 | Synthes (Usa) | Bone screw |
| CN2551207Y (en) * | 2002-03-08 | 2003-05-21 | 王增涛 | Screw with different pitches |
| CN201197743Y (en) * | 2008-05-30 | 2009-02-25 | 王桂芝 | Anti-loose bone nail |
| CN202020525U (en) * | 2011-03-28 | 2011-11-02 | 上海拓腾医疗器械有限公司 | Spine fixing device and pedicle screw thereof |
| CN102596073A (en) * | 2009-11-17 | 2012-07-18 | 新特斯有限责任公司 | Variable angle locking buttress pins |
| CN202960741U (en) * | 2012-12-21 | 2013-06-05 | 李书凡 | Countersunk forcing bone screw |
| CN103501734A (en) * | 2011-03-10 | 2014-01-08 | 新特斯有限责任公司 | Awl screw fixation members and related systems |
| CN103961173A (en) * | 2007-08-13 | 2014-08-06 | 新特斯有限责任公司 | Bone screw and method for forming screw thread on outer surface of head part |
-
2014
- 2014-12-31 CN CN201410847227.XA patent/CN105167835B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6306140B1 (en) * | 2001-01-17 | 2001-10-23 | Synthes (Usa) | Bone screw |
| CN2551207Y (en) * | 2002-03-08 | 2003-05-21 | 王增涛 | Screw with different pitches |
| CN103961173A (en) * | 2007-08-13 | 2014-08-06 | 新特斯有限责任公司 | Bone screw and method for forming screw thread on outer surface of head part |
| CN201197743Y (en) * | 2008-05-30 | 2009-02-25 | 王桂芝 | Anti-loose bone nail |
| CN102596073A (en) * | 2009-11-17 | 2012-07-18 | 新特斯有限责任公司 | Variable angle locking buttress pins |
| CN103501734A (en) * | 2011-03-10 | 2014-01-08 | 新特斯有限责任公司 | Awl screw fixation members and related systems |
| CN202020525U (en) * | 2011-03-28 | 2011-11-02 | 上海拓腾医疗器械有限公司 | Spine fixing device and pedicle screw thereof |
| CN202960741U (en) * | 2012-12-21 | 2013-06-05 | 李书凡 | Countersunk forcing bone screw |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108324357A (en) * | 2018-03-14 | 2018-07-27 | 熊鹰 | A kind of minimally invasive drift fixing bracket device |
| CN108324357B (en) * | 2018-03-14 | 2024-04-30 | 熊鹰 | Minimally invasive drifting fixed support device |
| CN112901778A (en) * | 2021-01-13 | 2021-06-04 | 西安近代化学研究所 | End face sealing device for threaded connection part |
| CN112901778B (en) * | 2021-01-13 | 2022-12-30 | 西安近代化学研究所 | End face sealing device for threaded connection part |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105167835B (en) | 2019-02-15 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 300308 Tianjin Binhai New Area Airport Economic Zone Jingyi 318 Patentee after: TIANJIN ZHENGTIAN MEDICAL APPLIANCE Co.,Ltd. Address before: 300384 Jingyi 318, Binhai New Area, Tianjin Patentee before: TIANJIN ZHENGTIAN MEDICAL APPLIANCE Co.,Ltd. |
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| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20151223 Assignee: Zhongguancun Technology Leasing Co.,Ltd. Assignor: TIANJIN ZHENGTIAN MEDICAL APPLIANCE Co.,Ltd. Contract record no.: X2022980014652 Denomination of invention: locking screw Granted publication date: 20190215 License type: Exclusive License Record date: 20220906 |
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| EE01 | Entry into force of recordation of patent licensing contract | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: locking screw Effective date of registration: 20220907 Granted publication date: 20190215 Pledgee: Zhongguancun Technology Leasing Co.,Ltd. Pledgor: TIANJIN ZHENGTIAN MEDICAL APPLIANCE Co.,Ltd. Registration number: Y2022980014764 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: Zhongguancun Technology Leasing Co.,Ltd. Assignor: TIANJIN ZHENGTIAN MEDICAL APPLIANCE Co.,Ltd. Contract record no.: X2022980014652 Date of cancellation: 20241012 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20190215 Pledgee: Zhongguancun Technology Leasing Co.,Ltd. Pledgor: TIANJIN ZHENGTIAN MEDICAL APPLIANCE Co.,Ltd. Registration number: Y2022980014764 |