CN102579121A - Atlas vertebral pedicle screw - Google Patents
Atlas vertebral pedicle screw Download PDFInfo
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- CN102579121A CN102579121A CN2012100626694A CN201210062669A CN102579121A CN 102579121 A CN102579121 A CN 102579121A CN 2012100626694 A CN2012100626694 A CN 2012100626694A CN 201210062669 A CN201210062669 A CN 201210062669A CN 102579121 A CN102579121 A CN 102579121A
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Abstract
An atlas vertebral pedicle screw comprises a screw body, a screw cap and a screw stem. The front end of the screw body is conical, the screw cap is fixedly arranged at the tail end of the screw body, an inner threaded hole is axially arranged in the screw cap along the axial direction of the screw body and is arranged in the upper end surface of the screw cap, a first groove and a second groove are arranged in the screw cap, both the first groove and the second groove are arranged in the upper end surface of the screw cap, the first groove and the second groove are perpendicular and are crossed in the inner threaded hole, the depth of the second groove is larger than that of the first groove, the front end of the screw stem is connected into the inner threaded hole in a threaded manner, a driving inner cavity is fixedly arranged at the rear end of the screw stem, and the lower portion of the screw cap is radially protruded outwards like a drum in an axial section of the screw cap. Two connecting bars can be placed in the first groove and the second groove and are respectively connected with an atlas screw and an atlantoaxial vertebral pedicle screw, the connecting bars are locked by the screw stem, and atlas fracture reduction and atantoaxial fusion internal fixation are realized in an internal fixing system. The atlas vertebral pedicle screw is simple in structure and convenient in use.
Description
Technical field:
The present invention relates to the mankind life article, relate in particular to medical apparatus and instruments, the particularly auxiliary device of cervical operation, concrete is a kind of atlas pedicle screw.
Background technology:
2～13% of the about cervical spine injury of atlas damage accounts for 1.3% of all spinal injuries.Typical atlas bursting fracture is that the forward and backward bow of atlas has two fracture lines respectively, demonstrates four fracture presentations; Atypical bursting fracture maybe be also with the fracture of lateral mass of atlas.This type of fracture is if promptly be referred to as unstability atlas bursting fracture with the transverse ligament damage, in case take place, the mechanical stability of articulatio atlantoepistrophica will receive serious destruction, and the atlantoaxial dislocation that brings thus is a kind of serious threat to patient's life.Although non-operative treatment can make the part patient obtain to cure; But some authors propose non-operative treatment can not make articulatio atlantoepistrophica obtain effective mechanical stability, and dentata unstable long-term existence in extensive region jeopardizes patient's life; So row way of escape extensive region dentata fusion was only a kind of certain efficacious therapy method after articulatio atlantoepistrophica resetted.
In the prior art, the mode of extensive region dentata fusion has: (1) way of escape is fixed through interarticular screw.This technology has good anti-turning effort, and anti-bend and stretch do relatively poor, and can't the fixed structure plant bone mass.(2) the per os lateral mass screw is fixed.This link of technical application steel plate and pressurization reset isolating lateral mass, can't rebuild Atlantoaxial stablizing, and are only applicable to stable atlas fracture.(3) the throat road through oropharynx steel plate extensive region dentata fix.This technology can obtain similar stablizing effect with other method, but operative approach is difficult than the way of escape.(4) pillow neck fusion and internal fixation.The effect that this technology is rebuild stability is certain, loses bigger but merge the back cervical vertebrate active degree.
Way of escape extensive region dentata pedicle screw integration technology is a kind of newer way of escape integration technology, and the above surgical technic of comparing, extensive region dentata nut screw can run through the preceding middle back of atlas three posts, and biomechanical stability is better; And this system horizontal-associate pressurization capable of using accomplishes that the lateral mass fracture is isolating to be resetted immediately, and increases the intensity of internal fixation structure, especially can increase rotational stabilization, can obtain strong anatomical reduction and firm stability is kept.Yet in the internal fixation method of this employing horizontal-associate, laterally plus-pressure is the nail tail that is passed to the atlas screw through pitman, and is poor for the isolating reset effect of lateral mass of atlas; And when pressurizeing through horizontal-associate, the fine motion that the syndeton place of screw afterbody and pitman produces possibly change plus-pressure into revolving force, further influences reset response.Exist bigger atlas fracture to separate like the patient; Possibly cause reduction of the fracture poor effect through the horizontal pressurization of horizontal-associate; Cause the generation of situation such as malunion of fracture or disunion; The patient still exists the extensive region dentata unstable behind operative treatment, and axially bad obstinate pain of incidence and the limitation of activity of causing of para-position influences operative effect.
In addition, utilize separately in addition at present the atlas pedicle screw add pitman, through the atlas that resets at once behind the horizontal locking and pressurizing screw isolating treatment technology of fracturing.But this technology only can be accomplished the reduction of the fracture, can not accomplish extensive region dentata fusion simultaneously, so this technology and be not suitable for the treatment with the unsteady atlas bursting fracture of extensive region dentata.
This shows still do not have a kind of atlas pedicle screw at present, can be used and in an internal fixation system, realize that the atlas fracture is separated resets and extensive region dentata presented in internal fixation with the dentata pedicle screw.
Summary of the invention:
The object of the present invention is to provide a kind of atlas pedicle screw, described this atlas pedicle screw will solve atlas pedicle screw in the prior art can not realize simultaneously that the atlas fracture separates the technical problem that resets with extensive region dentata presented in internal fixation.
This atlas pedicle screw of the present invention comprises nail body, the head of a nail and screw rod, and the front end of nail body is tapered; Wherein, the described head of a nail is fixedly installed on the tail end of described nail body, axially is provided with internal thread hole along the nail body in the head of a nail; Described internal thread hole is opened in the upper surface of the head of a nail, is provided with one first groove and one second groove in the head of a nail, and the cross sectional shape of described first groove and second groove all takes the shape of the letter U; First groove and the equal opening of second groove are in the upper surface of the head of a nail, and first groove is vertical with second groove and intersect in the internal thread hole, and the degree of depth of second groove is greater than the degree of depth of first groove; The front end of described screw rod is through being threaded in the internal thread hole; The rear end of screw rod is set with the driving inner chamber, and in the axial cross section of the head of a nail, head of a nail bottom outwards is the cydariform protrusion diametrically.
Further, the described head of a nail is connected with the tail end of described nail body through screw thread.
Further, the reach in the described internal thread hole is greater than the degree of depth of first groove and less than the degree of depth of second groove.
Further, the degree of depth of first groove is 5.5 millimeters, and the degree of depth of second groove is 11 millimeters, and the reach in the internal thread hole is 9 millimeters, and the width of first groove is 3.2 millimeters, and the width of second groove is 3.2 millimeters.
Further, the external diameter of spiro rod rear end is 13 millimeters.
Further, the degree of depth of second groove is the twice of first depth of groove.
Further, the radial section of the driving inner chamber of described spiro rod rear end is hexagon or triangle or rectangle.
Further, in the axial cross section of the head of a nail, the edge of head of a nail bottom protuberance and the head of a nail radially be 50 the degree angles.
Operation principle of the present invention is: will follow closely body earlier and implant the bilateral lateral mass of atlas; Change moving nail body then with first groove in the adjusting head of a nail upper surface and the direction of second groove, in second groove, laterally insert pitman then, connect bilateral atlas screw through pitman; Utilize pressue device to realize the horizontal pressurization between bilateral atlas screw; Lateral mass of atlas to lateral displacement resets, and in first groove, inserts vertical pitman then, connects the dentata pedicle screw of bilateral through vertical pitman; Screw rod is put into the internal thread hole of the head of a nail and locked pitman and vertical pitman, finally realize the atlas reduction of the fracture and extensive region dentata presented in internal fixation.
Pitman described in the present invention, vertical pitman, atlas screw and dentata pedicle screw are prior art.
The present invention and prior art are compared, and its effect is actively with tangible.The present invention is provided with two grooves of decussation in the head of a nail; Can put into two orthogonal pitmans; Connect atlas screw and dentata pedicle screw respectively, and utilize a screw rod locking pitman, in an internal fixation system, realize the atlas reduction of the fracture and extensive region dentata presented in internal fixation.The present invention is simple in structure, and is easy to use, for the treatment of unstability atlas bursting fracture provides a kind of effective fixture.
Description of drawings:
Fig. 1 is the structural representation of a kind of atlas pedicle screw of the present invention.
Fig. 2 is the schematic top plan view of a kind of atlas pedicle screw of the present invention.
Fig. 3 is the schematic top plan view of the screw rod in a kind of atlas pedicle screw of the present invention.
The specific embodiment:
Embodiment 1:
Like Fig. 1, Fig. 2 and shown in Figure 3, a kind of atlas pedicle screw of the present invention comprises nail body 1, the head of a nail 2 and screw rod (not shown); The front end of nail body 1 is tapered, and wherein, the head of a nail 2 is fixedly installed on the tail end of described nail body 1; In the head of a nail 2 along nail bodies 1 axially be provided with internal thread hole, described internal thread hole is opened in the upper surface of the head of a nail 2, is provided with one first groove 5 and one second groove 6 in the head of a nail 2; The cross sectional shape of described first groove 5 and second groove 6 all takes the shape of the letter U; First groove 5 and second groove, 6 equal openings are in the upper surface of the head of a nail 2, and first groove 5 is vertical with second groove 6 and intersect in the internal thread hole, and the degree of depth h1 of second groove 6 is greater than the degree of depth h2 of first groove 5; The front end of described screw rod is through being threaded in the internal thread hole; The rear end of screw rod is set with the driving inner chamber, and in the axial cross section of the head of a nail 2, the head of a nail 2 bottoms 4 outwards are the cydariform protrusion diametrically.
Further, the described head of a nail 2 is connected with the tail end of described nail body 1 through screw thread.
Further, the reach L in the described internal thread hole is greater than the degree of depth h2 of first groove 5 and less than the degree of depth h1 of second groove 6.
Further, the degree of depth h2 of first groove 5 is 5.5 millimeters, and the degree of depth h1 of second groove 6 is 11 millimeters, and the reach L in the internal thread hole is 9 millimeters, and the width w1 of first groove 5 is 3.2 millimeters, and the width w2 of second groove 6 is 3.2 millimeters.
Further, the external diameter R of spiro rod rear end is 13 millimeters.
Further, the degree of depth h1 of second groove 6 is the twice of first groove, 5 degree of depth.
Further, the radial section of the driving inner chamber of described spiro rod rear end is hexagon or triangle or rectangle.
Further, in the axial cross section of the head of a nail 2, the edge of the head of a nail 2 bottoms 4 protuberances and the head of a nail 2 radially be 50 the degree angles.
The operation principle of present embodiment is: will follow closely body 1 earlier and implant the bilateral lateral mass of atlas; Change moving nail body 1 then with first groove 5 in the adjusting head of a nail 2 upper surfaces and the direction of second groove 6, in second groove 6, laterally insert the pitman (not shown) then, connect bilateral atlas screw (not shown) through pitman; Utilize pressue device to realize the horizontal pressurization between bilateral atlas screw; Lateral mass of atlas to lateral displacement resets, and in first groove 5, inserts vertical pitman (not shown) then, connects the dentata pedicle screw (not shown) of bilateral through vertical pitman; Screw rod is put into the internal thread hole of the head of a nail 2; Revolve tool with interior hexagonal spiral shell cutter or other of coupling and be tightened in the head of a nail 2, locking pitman and vertical pitman are finally realized the atlas reduction of the fracture and extensive region dentata presented in internal fixation.
In the present embodiment, the reset force that laterally pressurizes is directly delivered on the lateral mass of atlas of displacement, can farthest realizes resetting of lateral mass fracture, improve the union of fracture rate.
Parameters such as the material of nail body 1, diameter, length are identical with existing atlas pedicle screw.
The foregoing description is a preferred implementation of the present invention; But embodiment of the present invention is not restricted to the described embodiments, and other any do not deviate from the change of being done under spirit of the present invention and the principle, modifies; Substitute; The substitute mode that all should be equivalence is simplified in combination, is included within protection scope of the present invention.
Claims (8)
1. an atlas pedicle screw comprises nail body, the head of a nail and screw rod, and the front end of nail body is tapered; It is characterized in that: the described head of a nail is fixedly installed on the tail end of described nail body, in the head of a nail along the nail body axially be provided with internal thread hole, described internal thread hole is opened in the upper surface of the head of a nail; Be provided with one first groove and one second groove in the head of a nail, the cross sectional shape of described first groove and second groove all takes the shape of the letter U, and first groove and the equal opening of second groove are in the upper surface of the head of a nail; First groove is vertical with second groove and intersect in the internal thread hole; The degree of depth of second groove is greater than the degree of depth of first groove, and the front end of described screw rod is through being threaded in the internal thread hole, and the rear end of screw rod is set with the driving inner chamber; In the axial cross section of the head of a nail, head of a nail bottom outwards is the cydariform protrusion diametrically.
2. a kind of atlas pedicle screw as claimed in claim 1 is characterized in that: the described head of a nail is connected with the tail end of described nail body through screw thread.
3. a kind of atlas pedicle screw as claimed in claim 1 is characterized in that: the reach in the described internal thread hole is greater than the degree of depth of first groove and less than the degree of depth of second groove.
4. a kind of atlas pedicle screw as claimed in claim 1; It is characterized in that: the degree of depth of first groove is 5.5 millimeters, and the degree of depth of second groove is 11 millimeters, and the reach in the internal thread hole is 9 millimeters; The width of first groove is 3.2 millimeters, and the width of second groove is 3.2 millimeters.
5. a kind of atlas pedicle screw as claimed in claim 4 is characterized in that: the external diameter of spiro rod rear end is 13 millimeters.
6. a kind of atlas pedicle screw as claimed in claim 1 is characterized in that: the degree of depth of second groove is the twice of first depth of groove.
7. a kind of atlas pedicle screw as claimed in claim 1 is characterized in that: the radial section of the driving inner chamber of described spiro rod rear end is hexagon or triangle or rectangle.
8. a kind of atlas pedicle screw as claimed in claim 1 is characterized in that: in the axial cross section of the head of a nail, the edge of head of a nail bottom protuberance and the head of a nail radially be 50 the degree angles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210062669.4A CN102579121B (en) | 2012-03-09 | 2012-03-09 | Atlas vertebral pedicle screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210062669.4A CN102579121B (en) | 2012-03-09 | 2012-03-09 | Atlas vertebral pedicle screw |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102579121A true CN102579121A (en) | 2012-07-18 |
| CN102579121B CN102579121B (en) | 2014-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210062669.4A Active CN102579121B (en) | 2012-03-09 | 2012-03-09 | Atlas vertebral pedicle screw |
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| CN (1) | CN102579121B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105232131A (en) * | 2015-11-16 | 2016-01-13 | 苏州施必牢精密紧固件有限公司 | Lock type pedicle screw |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10005386A1 (en) * | 2000-02-07 | 2001-08-09 | Ulrich Gmbh & Co Kg | Pedicle screw for spinal implants takes round bar whose longitudinally rotating shoe notchably accepts notch-legged clip for bar. |
| US20060155277A1 (en) * | 2002-03-21 | 2006-07-13 | Peter Metz-Stavenhagen | Anchoring element for securing a rod of a device for adjusting a human or animal vertrebal column on a vertreba |
| CN101090675A (en) * | 2004-06-23 | 2007-12-19 | 应用脊柱外科技术公司 | Systems and methods for spine stabilization |
| CN202497230U (en) * | 2012-03-09 | 2012-10-24 | 中国人民解放军第二军医大学 | Atlas pedicle screw |
-
2012
- 2012-03-09 CN CN201210062669.4A patent/CN102579121B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10005386A1 (en) * | 2000-02-07 | 2001-08-09 | Ulrich Gmbh & Co Kg | Pedicle screw for spinal implants takes round bar whose longitudinally rotating shoe notchably accepts notch-legged clip for bar. |
| US20060155277A1 (en) * | 2002-03-21 | 2006-07-13 | Peter Metz-Stavenhagen | Anchoring element for securing a rod of a device for adjusting a human or animal vertrebal column on a vertreba |
| CN101090675A (en) * | 2004-06-23 | 2007-12-19 | 应用脊柱外科技术公司 | Systems and methods for spine stabilization |
| CN202497230U (en) * | 2012-03-09 | 2012-10-24 | 中国人民解放军第二军医大学 | Atlas pedicle screw |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105232131A (en) * | 2015-11-16 | 2016-01-13 | 苏州施必牢精密紧固件有限公司 | Lock type pedicle screw |
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| Publication number | Publication date |
|---|---|
| CN102579121B (en) | 2014-02-26 |
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