CN204931827U - Anatomical form pedicle screw - Google Patents
Anatomical form pedicle screw Download PDFInfo
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- CN204931827U CN204931827U CN201520541245.5U CN201520541245U CN204931827U CN 204931827 U CN204931827 U CN 204931827U CN 201520541245 U CN201520541245 U CN 201520541245U CN 204931827 U CN204931827 U CN 204931827U
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- slot
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- pedicle
- rivet nut
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Abstract
This utility model provides a kind of anatomical form pedicle screw, belongs to technical field of medical instruments.This anatomical form pedicle screw comprises: rivet nut and at least one latch, the transverse section of described rivet nut is circular, the sidewall of described rivet nut is provided with slot the same number of with described latch vertically, and described latch mates with described slot and is connected, and the side of described latch is stretched out outside described slot.The pedicle screw that this utility model provides is according to the anatomic characteristic of human vertebra pedicle of vertebral arch, utilize latch and there is the cooperation of rivet nut of circular transverse section, with upper and lower, the inside and outside wall close contact of pedicle of vertebral arch, achieve more stable to pedicle of vertebral arch and firmly fix.
Description
Technical field
This utility model relates to technical field of medical instruments, in particular to a kind of anatomical form pedicle screw.
Background technology
At present; usually pedicle screw can be used in the spine disorders operations such as treatment Thoracolumbar disk wound, regression, deformity, tumor and infection; the mode that pedicle screw is fixed by three posts; overcome most of spinous process in the past, vertebral plate, lateral mass and the biomechanics defect of various fixed apparatus of vertebral body; reach at once stable, malformation correction, protection spinal cord and nerve roots, the infection control of post before, during and after spinal column, reduce the function that medical treatment and nursing rely on.The pedicle screw used at present all designs based on vertebral arch pedicle of vertebral column narrowest position width, its transverse section of all pedicle screws is all circular, but the anatomic form of human body each vertebra pedicle of vertebral arch is not circle but oval, it is highly greater than pedicle widths, and existing pedicle screw is that non-anatomical is fixed.The situation that existing pedicle screw has in clinical can not be satisfied with reset, deformity can not be satisfied with correction, pedicle of vertebral arch inside and outside wall worn out by screw, may need to extend fixed-segment, increases screw diameter, adopt the measures such as bone cement enhancing in art.Some patients of long-term postoperative occur that screw is extracted, rupture, Loss of correction, deformity of spine increase the weight of etc. causes patient's lumbar and back pain, numb limbs and tense tendons unable, even makes patient lose the situations such as self care ability and occurs.
Utility model content
The purpose of this utility model is to provide a kind of anatomical form pedicle screw, to realize fixing the anatomy of pedicle of vertebral arch, improves fixed effect, lowers the loosening risk of postoperative screw.
This utility model is achieved in that
A kind of anatomical form pedicle screw, comprise: rivet nut and at least one latch, the transverse section of described rivet nut is circular, and the sidewall of described rivet nut is provided with slot the same number of with described latch vertically, described latch mates with described slot and is connected, and the side of described latch is stretched out outside described slot.
As preferred scheme, the cross section of described latch is trapezoidal, and described trapezoidal going to the bottom is positioned at described slot, and described trapezoidal upper base is positioned at outside described slot, and described slot is the dovetail groove mated with described latch.Cross section due to latch is trapezoidal, and its trapezoidal upper base is positioned at outside latch, trapezoidal going to the bottom is positioned at latch, the dovetail groove then mated with latch has the structure that bottom is large, top is little, after latch is goed deep into dovetail groove, latch can be fixed by dovetail groove, can prevent situation about being separated from each other between latch and dovetail groove.By there is the latch of trapezoidal cross section and there is the cooperation of slot of trapezoidal cross section, substantially increase the connectivity robustness between latch and rivet nut and stability, thus when making to utilize screw to fix pedicle of vertebral arch, greatly can improve the fixed effect of pedicle of vertebral arch.
As preferred scheme, the described latch stretched out outside described slot is provided with outer convex globoidal.Latch outside slot has outer convex globoidal, then there is between itself and pedicle of vertebral arch larger contact area, can with the cortical bone inwall tabling of inferior thyroid notch in pedicle of vertebral arch, clog the interior spongiosa bone cavity that pedicle screw fixes rear remaining pedicle of vertebral arch upper and lower side, thus increase its mechanics constant intensity, comprise resisting pull out forces, torsional rotation force, anti-distracting force and compression resistance force, substantially increase fixing effect.
As preferred scheme, described latch comprises integrated plunger and shank, described shank stretches in described slot, and described plunger is positioned at outside described slot, and described shank connects the cross-sectional area of the one end being greater than the contiguous described plunger of described latch away from the cross section of one end of described plunger.Latch comprises plunger and shank, and shank is positioned at slot, contacts so that fixing with spongiosa stock chamber in pedicle of vertebral arch; Plunger is positioned at outside slot, and when profit is screwed pedicle of vertebral arch, plunger can stop that latch continues reach or comes off, and as operative failure needs again to perform the operation, by clamping plunger, conveniently can take out latch, then take out screw.In addition, shank large scale section and small size section, large scale section is positioned at the bottom of slot, and small size section is positioned at slot mouth, and this can reinforce latch further, avoids it to skid off easily outside slot.
As preferred method, one end of described slot is positioned at the end of described rivet nut, and the other end of described slot is positioned at the middle part of described rivet nut axis, and the length that described latch stretches into described slot is equal with the length of described slot.The length stretching into the part of slot due to latch is equal with the length of slot, then between latch and slot, exposure level is higher, and both contacts are more tight, and latch contacts with pedicle of vertebral arch can reinforce rivet nut, prevents loosening of screw.
As preferred method, described rivet nut is provided with conical from tap holder, is describedly connected with rivet nut at the bottom of the cone of tap holder.Be arranged so that rivet nut has the function of self tapping from tap holder, automatically can screw, enter the pedicle of vertebral arch of human vertebra, thus be conducive to the fastening of screw and use.
As preferred scheme, also comprise: nail tail, nut and pitman, the outer wall of described nut is provided with screw thread vertically, described nut centrally axle is provided with fixing hole, described nail tail, described rivet nut and describedly to connect successively from tap holder, described nail tail is provided with the tail chamber coaxial with described rivet nut, described tail chamber is provided with opening away from one end of told rivet nut, described nut is threaded with described tail chamber through described opening, the end of described pitman is positioned at described tail intracavity, and contact with described nut and connect, adjacent two anatomical form pedicle screws are connected by described pitman.Being arranged so that of pitman can be interconnected with one another between anatomical form pedicle screw, thus it is fixing to be convenient to pedicle of vertebral arch.Pitman is connected with anatomical form pedicle screw with the cooperation of nut by nail tail, arrange tail chamber in nail tail to be connected with its thread, nut is avoided to protrude and impact pedicle of vertebral arch, tail intracavity is put in the end of pitman simultaneously, can improve the fixed effect of pitman, situation about coming off when preventing it fixing.
As preferred scheme, the sidewall of described nail tail is provided with two U-shaped holes be communicated with described tail chamber, two described U-shaped holes are symmetrical along the axis of described nail tail, and described slot is communicated with a described U-shaped hole, and described latch passes described U-shaped hole and stretches into the described slot be communicated with this U-shaped hole.Anatomical form pedicle screw arranges slot, and the latch mated with slot makes screw form the structure protruding the wing, thus makes the fixing more firm of screw and pedicle of vertebral arch.In addition, because nail tail arranges U-shaped hole, pitman is more convenient with the connection of nail tail, consistent in the sagittal plain of pedicle of vertebral arch, can improve the fixed effect to pedicle of vertebral arch, reduces because the situation such as distortion of pitman is to the compressing of pedicle of vertebral arch.
As preferred scheme, described fixing hole is interior hexagonal through hole.Nut arranges interior hexagonal through hole, and die nut can be utilized during operation to carry out fastening to nut, also very convenient during taking-up.
As preferred scheme, the shape of described pitman is cylindrical.Because pitman adopts cylindrical, when being fixed in the tail intracavity of nut and nail tail, pitman has certain turning power, then can carry out appropriate adjustment pitman, to reach preferably stable connection state according to the shape of pedicle of vertebral arch in operation process.
The beneficial effects of the utility model:
This anatomical form pedicle screw, is provided with latch in both sides, and this makes screw have anatomical shape closer to pedicle of vertebral arch, can play good fixation to pedicle of vertebral arch.This anatomical form pedicle screw has the following advantages:
1, compared with common pedicle screw, this anatomical form pedicle of vertebral arch screw nails on and adds slot, and insert pin coupling to connect, this pin protrudes from outside rivet nut, clog the interior spongiosa bone cavity that pedicle screw fixes rear remaining pedicle of vertebral arch upper and lower side, greatly increase the contact area of thumb screw and pedicle of vertebral arch inner cortex bone, increase its mechanics constant intensity, comprise resisting pull out forces, torsional rotation force, anti-distracting force and compression resistance force.
2, in the anatomical form that provides of this utility model, pedicle screw is specially adapted to lumbar vertebra and lumbosacral spine and needs strong fixing, severe malformation correction, extends the patient of fixed-segment, is combined pedicle of vertebral arch inside and outside wall in osteoporosis, art and breaks and the patient of revision procedure again has preferably result of use.
3, the insertion of pin and convenient to remove, and can have an X-rayed ascending adjustment according to position, C arm machine side targeting in art, avoids in insertion process and causes breaking and stimulation to exiting nerve root of lower wall in pedicle of vertebral arch.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of this utility model embodiment, be briefly described to the accompanying drawing used required in embodiment below, be to be understood that, the following drawings illustrate only some embodiment of the present utility model, therefore the restriction to scope should be counted as, for those of ordinary skill in the art, under the prerequisite not paying creative work, other relevant accompanying drawings can also be obtained according to these accompanying drawings.
The structural representation of the anatomical form pedicle screw that Fig. 1 provides for this utility model embodiment; (not comprising latch)
Fig. 2 shows the structural representation in the tail chamber of the nail tail in the anatomical form pedicle screw that Fig. 1 provides;
Fig. 3 shows the top view of the nail tail in the anatomical form pedicle screw that this utility model embodiment provides;
Fig. 4 shows the structural representation of the latch in the anatomical form pedicle screw that this utility model embodiment provides;
Fig. 5 illustrates the top view of the latch in the anatomical form pedicle screw that Fig. 4 provides;
Nail tail in the anatomical form pedicle screw that Fig. 6 provides for this utility model embodiment and the connection status figure of latch;
The structural representation of the nail tail in the anatomical form pedicle screw that Fig. 7 provides for this utility model embodiment;
The structural representation of the pitman in the anatomical form pedicle screw that Fig. 8 provides for this utility model embodiment;
The structural representation of the another kind of pitman in the anatomical form pedicle screw that Fig. 9 provides for this utility model embodiment;
The connection status schematic diagram of the anatomical form pedicle screw that Figure 10 provides for this utility model embodiment and nut;
By the connection status schematic diagram of pitman between two anatomical form pedicle screws that Figure 11 provides for this utility model embodiment.
Description of reference numerals
Rivet nut 101; From tap holder 102; Nail tail 103; U-shaped hole 104; Slot 105;
Plunger 201; Shank 202; Outer convex globoidal 203; Nut 301; Fixing hole 302;
Pitman 401.
Detailed description of the invention
For making the object of this utility model embodiment, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in this utility model embodiment, technical scheme in this utility model embodiment is clearly and completely described, obviously, described embodiment is this utility model part embodiment, instead of whole embodiments.The assembly of this utility model embodiment describing and illustrate in usual accompanying drawing herein can be arranged with various different configuration and design.Therefore, below to the detailed description of the embodiment of the present utility model provided in the accompanying drawings and the claimed scope of the present utility model of not intended to be limiting, but selected embodiment of the present utility model is only represented.Based on the embodiment in this utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of this utility model protection.
It should be noted that: represent similar terms in similar label and letter accompanying drawing below, therefore, once be defined in an a certain Xiang Yi accompanying drawing, then do not need to define further it and explain in accompanying drawing subsequently.
In description of the present utility model, it should be noted that, term " " center ", " on ", D score, " left side ", " right side ", " vertically ", " level ", " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, or this utility model product orientation of usually putting or position relationship when using, only this utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.In addition, term " first ", " second ", " the 3rd " etc. only for distinguishing description, and can not be interpreted as instruction or hint relative importance.
In description of the present utility model, also it should be noted that, unless otherwise clearly defined and limited, term " setting ", " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition the concrete meaning of above-mentioned term in this utility model can be understood.
In clinical operation, desirable pedicle screw needs screw to meet can fill up pedicle of vertebral arch upper and lower, left and right wall, and the pedicle of vertebral arch cortical bone of the screw thread energy cutting part of screw, but do not cause breaking of pedicle wall.Human body pedicle of vertebral arch is oval instead of circular, it is highly greater than pedicle widths, but existing pedicle screw, all design by the interior outside width in the narrow portion of the pedicle of vertebral arch at each position, therefore most of screw only secures the inside and outside wall of pedicle of vertebral arch, and in pedicle of vertebral arch, lower wall does not all obtain good fixing, cause the orthopedic force having occurred screw, bed knife, distracting force, resistance to plucking removes all relatively weak problem of power, and often must increase screw number in art, extend fixed-segment, there is Loss of correction in long term, supporter sinks, the situations such as screw loosening fracture.
For the problems referred to above, the present inventor devises a kind of anatomical form pedicle screw, consults Fig. 1 to Figure 11, utilizes this anatomical form pedicle screw can realize well fixing, rectification effect.This anatomical form pedicle screw comprises: rivet nut 101 and a latch, and the transverse section of rivet nut 101 is circular, and the sidewall of rivet nut 101 is provided with a slot 105 vertically, and latch mates with slot 105 and is connected, and the side of latch is stretched out outside slot 105.The length of rivet nut 101 is of different sizes according to the needs of design, and such as length 30 ~ 50mm, every 5mm model, the diameter of rivet nut 101 can have 6mm, 6.5mm, 7mm equal-specification.
Rivet nut 101 stretches in pedicle of vertebral arch when fixing as the main body of screw, the latch and the rivet nut 101 that are positioned at slot 105 are firmly fixed, the latch side stretched into outside slot 105 can fill up the bone cavity of the pedicle of vertebral arch upper and lower end stayed after pedicle screw is fixed when screw enters pedicle of vertebral arch, substantially increase the contact area of screw and inner cortex bone, thus fixed effect is improved greatly, screw is less likely to occur to extract situations such as coming off, twist.
Based on pedicle of vertebral arch consideration anatomically, it has the advantages that highly be greater than width, ratio is about 1.5:1, in order to make the contact between latch and pedicle of vertebral arch inner cortex bone better, one end of slot 105 is positioned at the end of rivet nut 101, the other end of slot 105 is positioned at the middle part of rivet nut 101 axis, and the length that latch stretches into slot 105 is equal with the length of slot 105.Design by the way, one end entering pedicle of vertebral arch of latch can between pedicle of vertebral arch leading edge and vertebral body trailing edge, thus more abundant with the contact of the inner cortex bone of pedicle of vertebral arch, substantially increases fixed effect.In the present embodiment, the length of slot 105 is 2.5mm.
Preferably, the cross section of latch is trapezoidal, and trapezoidal going to the bottom is positioned at slot 105, and trapezoidal upper base is positioned at outside slot 105, and slot 105 is the dovetail groove mated with latch.Because slot 105 and latch adopt the trapezoidal mode coordinated, and trapezoidal the going to the bottom of latch is positioned at slot 105, and the trapezoidal upper base of latch is positioned at outside slot 105, thus the connectivity robustness of latch and slot 105 and stability are increased significantly.Because slot 105 is trapezium structure, it has the construction features that bottom is large, top is little, thus the latch inserting slot 105 can be fixed, when latch is subject to External Force Acting, latch is pinned by the little structure at the top of slot 105, thus prevents it from deviating from the generation of the situation outside slot 105.Further, the latch be positioned at outside slot 105 is provided with outer convex globoidal 203, outer convex globoidal 203 has larger contact area with the inner cortex bone of pedicle of vertebral arch, is close to the anatomic form of pedicle of vertebral arch upper and lower wall inner edge cortical bone, thus can increases fixing fastness.
Later stage, when pulling out screw, needs latch to extract, so that the friction reduced between screw and pedicle of vertebral arch and contact area, what reduce screw extracts difficulty.Thus, latch also includes plunger 201 and shank 202, plunger 201 and shank 202 one-body molded, improve the bulk strength of latch and stable.Shank 202 stretches in slot 105, and plunger 201 is positioned at outside slot 105, and the motion of latch in slot 105 limits by plunger 201, avoids latch to stretch into the taking-up being not easy to latch in slot 105 completely.When needing to take out screw, by plunger 201, just latch is from taking-up in slot 105, more convenient and quick, and little to the stimulation of pedicle of vertebral arch, can reduce the injury to pedicle of vertebral arch inner cortex bone.Preferably, shank 202 connects the cross-sectional area of the one end being greater than the contiguous plunger 201 of latch away from the cross section of one end of plunger 201, shank 202 is designed to the structure that one end size is large, other end size is little, after latch is inserted slot 105, connectivity robustness between itself and rivet nut 101 is improved, the situation that latch more not easily comes off.
During the screw utilizing this utility model to provide, need first to use surgical apparatus in pedicle of vertebral arch, carry out the making of boring and screw thread, then screw is connected with the hole in pedicle of vertebral arch.Due to can not mating completely of boring and the size of screw, this fixing operation obtained between screw and pedicle of vertebral arch has certain complexity.Based on above-mentioned consideration, rivet nut 101 is provided with conical from tap holder 102, be connected with rivet nut 101 at the bottom of the cone of tap holder 102, rivet nut 101 is made to have the function of driving automatically under external force from tap holder 102, by screw being fixed on pedicle of vertebral arch more easily from tap holder 102, by the mode that self tapping is holed, the connection between screw and pedicle of vertebral arch is more firm.
In actual operation, generally by using multiple screw to fix pedicle of vertebral arch, this just relates to fixing multiple screw, therefore, anatomical form pedicle screw also includes nail tail 103, nut 301 and pitman 401, follows closely tail 103, rivet nut 101 and connects successively from tap holder.Wherein, the outer wall of nut 301 is provided with screw thread vertically, and nut 301 centrally axle is provided with fixing hole 302, and nail tail 103 is provided with the tail chamber coaxial with rivet nut 101, tail chamber is provided with opening away from one end of told rivet nut 101, and nut 301 is threaded with tail chamber through opening.The end of pitman 401 is positioned at tail intracavity and contacts with nut 301 and connects, and adjacent two anatomical form pedicle screws are connected by pitman.After adjacent two screws are fixed on pedicle of vertebral arch, the two ends of pitman are stretched into respectively the tail intracavity of two screws, then by fixing hole 302, nut 301 is anchored on tail intracavity, along with nut 301 is in the continuous motion of tail intracavity, final nut 301 contacts with pitman, and pitman has been fixed at the bottom of tail chamber and between nut 301.Due to the setting in tail chamber, nut 301 can not be exposed to outside screw, thus prevents the compressing of nut 301 pairs of pedicles of vertebral arch or its hetero-organization and the sclerotin protruded, and makes the structure of screw more compact and succinct, easy to use and recovery.In clinical, the diameter of rivet nut mostly is 6.0 ~ 6.5mm, and the diameter of pitman is generally 5.5mm or 6.0mm.
Preferably, fixing hole 302 adopts has interior hexagonal through-hole structure to design, and so, die nut can be used to carry out turn-knob nut, the Contact of interior hexagonal through hole and die nut is more stable, is not easy the situation occurring skidding.The shape of pitman 401 can be cylindricality, and as quadrangular, in the present embodiment, pitman 401 is cylindrical.Pitman can for linear structure, also can according to pedicle of vertebral arch fixedly need bend, be cut to the length of needs.When needs are fixed longer pedicle of vertebral arch, length and the flexibility of pitman can be increased, so that pitman can connect more screw.
Connection conveniently between anatomical form pedicle screw, the sidewall of described nail tail 103 is provided with two U-shaped holes 104 be communicated with tail chamber, two U-shaped holes 104 are symmetrical along the axis of nail tail 103, slot 105 is communicated with a U-shaped hole 104, and latch passes described U-shaped hole 104 and stretches into the slot 105 be communicated with this U-shaped hole 104.When fixing screw with pedicle of vertebral arch, the passage in the tail chamber of tail 103 is entered to follow closely in U-shaped hole 104 as connecting plate, and then by nut, pitman is fixed tail intracavity.U-shaped hole also can adopt other shape, and such as cylindrical hole, prismatic hole etc., correspondingly, pitman also can be set to the columniform pitman mated with cylindrical hole, can also be set to the prismatic pitman mated with prismatic hole.
In the present embodiment, the quantity of latch, slot 105 is one, also can according to concrete needing to increase latch, the quantity of slot 105 is two.Two slots 105 are along the axial distribution of rivet nut 101, the slot 105 and the U-shaped hole 104 that are positioned at the same side of rivet nut 101 are interconnected, the slot 105 and the U-shaped hole 104 that are positioned at another homonymy of rivet nut 101 are interconnected, and two latches mate with a slot 105 respectively and are connected.In order to improve the resistance to plucking of latch except effect, the side that latch stretches out outside slot is provided with pawl.Pawl tightly can fasten pedicle of vertebral arch, and screw is followed closely as after pedicle of vertebral arch, and the pawl on latch blocks pedicle of vertebral arch; When latch is subject to active force away from pedicle of vertebral arch, the pawl of latch blocks pedicle of vertebral arch, thus can prevent it from being extracted easily.
The foregoing is only preferred embodiment of the present utility model, be not limited to this utility model, for a person skilled in the art, this utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (10)
1. an anatomical form pedicle screw, it is characterized in that, comprise: rivet nut and at least one latch, the transverse section of described rivet nut is circular, the sidewall of described rivet nut is provided with slot the same number of with described latch vertically, described latch mates with described slot and is connected, and the side of described latch is stretched out outside described slot.
2. anatomical form pedicle screw according to claim 1, it is characterized in that, the cross section of described latch is trapezoidal, and described trapezoidal going to the bottom is positioned at described slot, described trapezoidal upper base is positioned at outside described slot, and described slot is the dovetail groove mated with described latch.
3. anatomical form pedicle screw according to claim 2, is characterized in that, the described latch stretched out outside described slot is provided with outer convex globoidal.
4. the anatomical form pedicle screw according to Claims 2 or 3, it is characterized in that, described latch also comprises integrated plunger and shank, described shank stretches in described slot, described plunger is positioned at outside described slot, and described shank connects the cross-sectional area of the one end being greater than the contiguous described plunger of described latch away from the cross section of one end of described plunger.
5. anatomical form pedicle screw according to claim 1, it is characterized in that, one end of described slot is positioned at the end of described rivet nut, and the other end of described slot is positioned at the middle part of described rivet nut axis, and the length that described latch stretches into described slot is equal with the length of described slot.
6. anatomical form pedicle screw according to claim 1, is characterized in that, described rivet nut is provided with conical from tap holder, is describedly connected with rivet nut at the bottom of the cone of tap holder.
7. anatomical form pedicle screw according to claim 6, it is characterized in that, also comprise: nail tail, nut and pitman, the outer wall of described nut is provided with screw thread vertically, described nut centrally axle is provided with fixing hole, described nail tail, described rivet nut and describedly to connect successively from tap holder, described nail tail is provided with the tail chamber coaxial with described rivet nut, described tail chamber is provided with opening away from one end of told rivet nut, described nut is threaded with described tail chamber through described opening, the end of described pitman is positioned at described tail intracavity, and contact with described nut and connect, adjacent two anatomical form pedicle screws are connected by described pitman.
8. anatomical form pedicle screw according to claim 7, it is characterized in that, the sidewall of described nail tail is provided with two U-shaped holes be communicated with described tail chamber, two described U-shaped holes are symmetrical along the axis of described nail tail, described slot is communicated with a described U-shaped hole, and described latch passes described U-shaped hole and stretches into the described slot be communicated with this U-shaped hole.
9. the anatomical form pedicle screw according to claim 7 or 8, is characterized in that, described fixing hole is interior hexagonal through hole.
10. the anatomical form pedicle screw according to claim 7 or 8, is characterized in that, the shape of described pitman is cylindrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520541245.5U CN204931827U (en) | 2015-07-24 | 2015-07-24 | Anatomical form pedicle screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520541245.5U CN204931827U (en) | 2015-07-24 | 2015-07-24 | Anatomical form pedicle screw |
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| Publication Number | Publication Date |
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| CN204931827U true CN204931827U (en) | 2016-01-06 |
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| CN201520541245.5U Expired - Fee Related CN204931827U (en) | 2015-07-24 | 2015-07-24 | Anatomical form pedicle screw |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104970874A (en) * | 2015-07-24 | 2015-10-14 | 王清 | Dissection type pedicle screw |
| WO2022052743A1 (en) * | 2020-09-12 | 2022-03-17 | 陈聚伍 | Fracture composite structure fixing nail and fracture nail plate assembly |
-
2015
- 2015-07-24 CN CN201520541245.5U patent/CN204931827U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104970874A (en) * | 2015-07-24 | 2015-10-14 | 王清 | Dissection type pedicle screw |
| CN104970874B (en) * | 2015-07-24 | 2018-07-20 | 王清 | Anatomical form pedicle screw |
| WO2022052743A1 (en) * | 2020-09-12 | 2022-03-17 | 陈聚伍 | Fracture composite structure fixing nail and fracture nail plate assembly |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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