CN101816587A - Universal pedicle screw for internal fixation of spine - Google Patents
Universal pedicle screw for internal fixation of spine Download PDFInfo
- Publication number
- CN101816587A CN101816587A CN 201010149790 CN201010149790A CN101816587A CN 101816587 A CN101816587 A CN 101816587A CN 201010149790 CN201010149790 CN 201010149790 CN 201010149790 A CN201010149790 A CN 201010149790A CN 101816587 A CN101816587 A CN 101816587A
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- universal
- screw thread
- head sleeve
- screw
- packing washer
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Abstract
The invention discloses an orthopaedic implant product, in particular a universal pedicle screw for the internal fixation of spine. The universal pedicle screw is formed in a way that: a pedicle screw with a spherical cap runs through a universal head sleeve; one end of the universal head sleeve is U-shaped, while the other end is provided with a spherical hollow with a through hole; one end of the U-shaped inner wall is provided with universal head sleeve screw thread, while the other end is provided with screw thread; a groove is formed on the inner wall of the through hole between the screw thread and a spherical part; the spherical cap of the pedicle screw is clamped in the spherical hollow part, with the through hole, of the universal head sleeve; a hemispherical concave surface is arranged at one end of the spherical cap; one end of the outer wall of the hemispherical concave surface is provided with the screw thread, while the other end is provided with a packing washer with a smooth surface; the packing washer is screwed through the screw thread on the inner wall of the universal head sleeve and then into the groove; a correction lever is arranged above the packing washer; and a screw pressing nail is screwed above the correction lever. The locking structure has the characteristics of ingenious structural design, convenient mounting, capacity of avoiding the falling-off or excessive tension of the washer and secure and reliable clinical application.
Description
Technical field
The invention belongs to and import medium in the human body or be passed to apparatus on the human body, relate to and be used for clinically that the universal pedicle screw of traffic stud rod fixed system-internal fixation of spine resets after the bone surgery at diseases such as rachiocamposis, dislocation, fracture adopts spinal column, the universal pedicle screw of fixed a kind of internal fixation of spine.
Background technology
The universal pedicle screw of traffic stud rod fixed system-internal fixation of spine resets, fixes adopt spinal column at present clinically at the bone surgery of diseases such as rachiocamposis, dislocation, fracture after.A critical component packing washer in the universal pedicle screw of the internal fixation of spine of prior art, in this retaining mechanism, play a part to correct between thick stick and the pedicle nail and form a connecting link, existing packing washer structure has two side openings, around packing washer is a tubular structure, packing ring is placed in this tubular structure, two blind holes on the dependence tubular article sidewall are blocked packing washer (in two side openings of extrudate thrust washer) by two salient points of apparatus extrusion and are prevented that packing ring from coming off, make under the normal condition packing washer axially activity guarantee simultaneously not allow to come off, but extruding force is difficult to control accurately, two salient points of tubular article are clamp-oned the bad assurance of the degree of depth in packing washer two holes, dark or the shallow phenomenon of mistake of mistake that salient point can occur, cross and to make the stuck pressuring action that loses of packing washer deeply, cross pine and have a certain proportion of packing washer and can not be stuck in the tubular article and come off, can cause the operating time prolongation if in operation, come off.The structure of therefore existing packing washer exists disadvantage in clinical use.
Summary of the invention
The objective of the invention is to solve the drawback of the existing universal vertebral pedicle bolt structure of internal fixation of spine, provide a kind of promptly easy for installation, can avoid packing ring to come off again or the universal pedicle screw of internal fixation of spine of tension phenomenon.
Provide a kind of internal fixation of spine universal pedicle screw to achieve the object of the present invention, comprise and correct thick stick 4, it is characterized in that an end is set to the spherical caps shape, the pedicle nail 1 that the other end is set to threaded cone-shaped nail shape passes Universal-head sleeve 5, Universal-head sleeve 5 is that an end is set to the ball-type nest that " U " shape other end is set to through hole, at " U " of Universal-head sleeve 5 shape inwall one end Universal-head bush whorl 7 is set, the other end is provided with screw thread 8, the through-hole wall at ball-type nest position is provided with groove 9 below screw thread 8, and projection 10 is set below groove 9; The spherical caps of pedicle nail 1 is stuck in the ball-type nest that Universal-head sleeve 5 has through hole, and packing washer 2 is rounds that through hole is arranged, and its inwall one end is set to circular port, and the other end is set to the hemisphere spill, and its outer wall one end is provided with screw thread 3, and the other end is set to shiny surface; The screw thread 8 that packing washer 2 revolved universal sleeve 5 inwalls enters in the groove 9, places above packing washer 2 and corrects thick stick 4, screws in screw thread pressure nail 6 and go in the universal sleeve 5 to constitute above rectification thick stick 4.
2, the universal pedicle screw of internal fixation of spine according to claim 1 is characterized in that the width of described groove 9 has axially movable space to exceed with packing washer 2; Projection 10 internal diameter is less than the maximum outside diameter of the spherical caps of pedicle nail 1, and the internal diameter that packing washer 2 its outer walls are provided with the screw thread 8 of the external diameter of screw thread 3 one ends and Universal-head sleeve 5 is a matched in clearance.
3, the universal pedicle screw of internal fixation of spine according to claim 1, it is characterized in that it is round that screw thread is pressed nail 6, its inwall is provided with the through hole of six prismatics, its outer wall is provided with screw thread, and screw thread presses the screw thread 8 that screws in the Universal-head sleeve 5 of nail 6 to enter to compress in the Universal-head sleeve 5 and correct thick stick 4
The present invention is the internal fixation of spine implant that bone surgery adopts, be behind the spinal column in the traffic stud rod fixed system screw-type packing washer 2 in the universal pedicle screw be that externally threaded structure by packing ring screws in the sleeve of Universal-head, promptly screw in the reservation groove 9 in the sleeve, the packing ring precession can not screw out after reserving in the groove 9 again, rely on special instrument packing ring could be taken out in case of necessity, therefore packing ring of the present invention has the advantage of slip-off preventing, packing ring can contact the ballhead of pedicle screw freely in sleeve is reserved groove 9, therefore this packing ring can be avoided the stuck advantage that compresses pedicle nail that loses of packing ring again.
Operation fixedly the time sleeve 5 of Universal-head have a screw thread to press nail 6 to screw in and screw to push down rectification thick stick 4, correct thick stick 4 simultaneously and tightly push down packing washer 2, packing washer 2 is pushed down the pedicle screw 1 of spherical caps simultaneously, finishes the locking and the fixation procedure of universal pedicle screw like this.Design feature of the present invention is a compact conformation, compresses dependable performance, is not easy to come off.
Description of drawings
Fig. 1 is the structural representation of the universal pedicle screw of internal fixation of spine of the present invention.
Fig. 2 is the packing washer Universal-head sleeve longitudinal sectional view of the universal pedicle screw of internal fixation of spine of the present invention.
Fig. 3 is the packing washer longitudinal sectional view of the universal pedicle screw of internal fixation of spine of the present invention.
The reference numeral explanation:
1: pedicle nail 2: packing washer
3: packing washer screw thread 4: correct thick stick
5: Universal-head sleeve 6: screw thread is pressed nail
7: Universal-head bush whorl 8: screw thread
9: groove 10: projection
The specific embodiment
Below in conjunction with accompanying drawing the universal pedicle screw of a kind of internal fixation of spine of the present invention is described further, Fig. 1 is the structural representation of the universal pedicle screw of internal fixation of spine of the present invention.Fig. 2 is the packing washer Universal-head sleeve longitudinal sectional view of the universal pedicle screw of internal fixation of spine of the present invention.Fig. 3 is the packing washer longitudinal sectional view of the universal pedicle screw of internal fixation of spine of the present invention.As shown in Figure 1, 2, 3, the universal pedicle screw of internal fixation of spine of the present invention adopts Universal-head sleeve 5, packing washer 2, screw thread pressure nail 6, pedicle nail 1 composition that titanium alloy material is made.
Pedicle nail 1 is that an end is set to the spherical caps other end and is set to threaded cone-shaped nail shape.
Universal-head sleeve 5 is that an end is set to the ball-type nest that " U " shape other end is set to through hole, at " U " of Universal-head sleeve 5 shape inwall one end Universal-head bush whorl 7 is set, the other end is provided with screw thread 8, the through-hole wall at ball-type nest position is provided with groove 9 below screw thread 8, the width of groove 9 has axially movable space to exceed with packing washer 2, projection 10 is set below groove 9, and the internal diameter of projection 10 is less than the maximum outside diameter of the spherical caps of pedicle nail 1.
The universal pedicle screw assemble method of a kind of internal fixation of spine: pedicle nail 1 is passed the ball-type nest position that Universal-head sleeve 5 is placed on through hole, the spherical caps of pedicle nail 1 is stuck in after Universal-head sleeve 5 has the ball-type nest position of through hole, the screw thread 8 that packing washer 2 was revolved universal sleeve 5 enters in the reservation groove 9, above packing washer 2, place and correct thick stick 4, above rectification thick stick 4, screw in screw thread and press nail 6; The pressure of this moment passes on the pedicle nail 1 successively as shown in Figure 1 in bone surgery, realizes that the angle lock of universal nail fastens.As shown in Figure 3: after entering reservation groove 9 behind the screw thread 8 in the universal sleeve 5 of screw thread 3 processes of packing washer 2, after packing washer 2 is under pressure, packing washer 2 is pressed on the pedicle nail 1, packing washer 2 is subjected to axial counteracting force, but there is not revolving force this moment, therefore packing washer 2 can not screw out, can not come off, and guarantees clinically the bone surgery safety of diseases such as rachiocamposis, dislocation, fracture, effectively.
Claims (3)
1. universal pedicle screw of internal fixation of spine, comprise and correct thick stick 4, it is characterized in that an end is set to the spherical caps shape, the pedicle nail 1 that the other end is set to threaded cone-shaped nail shape passes Universal-head sleeve 5, Universal-head sleeve 5 is that an end is set to the ball-type nest that " U " shape other end is set to through hole, at " U " of Universal-head sleeve 5 shape inwall one end Universal-head bush whorl 7 is set, the other end is provided with screw thread 8, the through-hole wall at ball-type nest position is provided with groove 9 below screw thread 8, and projection 10 is set below groove 9; The spherical caps of pedicle nail 1 is stuck in the ball-type nest that Universal-head sleeve 5 has through hole, and packing washer 2 is rounds that through hole is arranged, and its inwall one end is set to circular port, and the other end is set to the hemisphere spill, and its outer wall one end is provided with screw thread 3, and the other end is set to shiny surface; The screw thread 8 that packing washer 2 revolved universal sleeve 5 inwalls enters in the groove 9, places above packing washer 2 and corrects thick stick 4, screws in screw thread pressure nail 6 and go in the universal sleeve 5 to constitute above rectification thick stick 4.
2. the universal pedicle screw of internal fixation of spine according to claim 1 is characterized in that the width of described groove 9 has axially movable space to exceed with packing washer 2; Projection 10 internal diameter is less than the maximum outside diameter of the spherical caps of pedicle nail 1, and the internal diameter that packing washer 2 its outer walls are provided with the screw thread 8 of the external diameter of screw thread 3 one ends and Universal-head sleeve 5 is a matched in clearance.
3. the universal pedicle screw of internal fixation of spine according to claim 1, it is characterized in that it is round that screw thread is pressed nail 6, its inwall is provided with the through hole of six prismatics, its outer wall is provided with screw thread, and screw thread presses the screw thread 8 that screws in the Universal-head sleeve 5 of nail 6 to enter to compress in the Universal-head sleeve 5 and correct thick stick 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010149790 CN101816587A (en) | 2010-04-19 | 2010-04-19 | Universal pedicle screw for internal fixation of spine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010149790 CN101816587A (en) | 2010-04-19 | 2010-04-19 | Universal pedicle screw for internal fixation of spine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101816587A true CN101816587A (en) | 2010-09-01 |
Family
ID=42651972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010149790 Pending CN101816587A (en) | 2010-04-19 | 2010-04-19 | Universal pedicle screw for internal fixation of spine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101816587A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102090920A (en) * | 2011-03-21 | 2011-06-15 | 丁亮华 | Universal micrometer pedicle screw |
| CN102319105A (en) * | 2011-08-15 | 2012-01-18 | 丁亮华 | Universal elastic torsion pedicle nail |
| CN102525626A (en) * | 2012-02-07 | 2012-07-04 | 陈远明 | Vertebral arch pedicle screw system capable of being embedded with minimal invasion |
| CN103690233A (en) * | 2014-01-03 | 2014-04-02 | 苏州市康力骨科器械有限公司 | Forked screw and spinal fixation rod system with same |
| CN105434021A (en) * | 2015-11-27 | 2016-03-30 | 周建明 | Pedicle screw |
| CN106344137A (en) * | 2015-07-21 | 2017-01-25 | 东北大学 | Posterior thoracolumbar flexible fixing system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2742931Y (en) * | 2004-10-28 | 2005-11-30 | 长安仪器有限公司 | Rhachis locking steel nail |
| CN100400006C (en) * | 2001-10-31 | 2008-07-09 | U&I公司 | Bone fixation apparatus |
| CN201263716Y (en) * | 2008-05-05 | 2009-07-01 | 胡桓宇 | Self-locking type universal vertebral pedicle nail |
-
2010
- 2010-04-19 CN CN 201010149790 patent/CN101816587A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100400006C (en) * | 2001-10-31 | 2008-07-09 | U&I公司 | Bone fixation apparatus |
| CN2742931Y (en) * | 2004-10-28 | 2005-11-30 | 长安仪器有限公司 | Rhachis locking steel nail |
| CN201263716Y (en) * | 2008-05-05 | 2009-07-01 | 胡桓宇 | Self-locking type universal vertebral pedicle nail |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102090920A (en) * | 2011-03-21 | 2011-06-15 | 丁亮华 | Universal micrometer pedicle screw |
| CN102319105A (en) * | 2011-08-15 | 2012-01-18 | 丁亮华 | Universal elastic torsion pedicle nail |
| CN102525626A (en) * | 2012-02-07 | 2012-07-04 | 陈远明 | Vertebral arch pedicle screw system capable of being embedded with minimal invasion |
| CN102525626B (en) * | 2012-02-07 | 2013-06-05 | 陈远明 | Vertebral arch pedicle screw system capable of being embedded with minimal invasion |
| CN103690233A (en) * | 2014-01-03 | 2014-04-02 | 苏州市康力骨科器械有限公司 | Forked screw and spinal fixation rod system with same |
| CN106344137A (en) * | 2015-07-21 | 2017-01-25 | 东北大学 | Posterior thoracolumbar flexible fixing system |
| CN105434021A (en) * | 2015-11-27 | 2016-03-30 | 周建明 | Pedicle screw |
| CN105434021B (en) * | 2015-11-27 | 2018-06-12 | 周建明 | A kind of pedicle screw |
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Open date: 20100901 |