CN203885595U - Vertebral arch screw system - Google Patents
Vertebral arch screw system Download PDFInfo
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- CN203885595U CN203885595U CN201420138101.0U CN201420138101U CN203885595U CN 203885595 U CN203885595 U CN 203885595U CN 201420138101 U CN201420138101 U CN 201420138101U CN 203885595 U CN203885595 U CN 203885595U
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7032—Screws or hooks with U-shaped head or back through which longitudinal rods pass
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7002—Longitudinal elements, e.g. rods
Abstract
The utility model discloses a vertebral arch screw system, it contains an at least screw, a horizontal pole, a body and a mounting. The screw has a head and a shaft, wherein the shaft is externally threaded and tapers to a conical tip extending from the bottom of the head to the other end. At least one part of the outer surface of the cross rod is a rough surface. The body is provided with a longitudinal through hole, a cross rod through channel and an internal thread, at least one part of the outer surface of the body is a rough surface, the through hole is arranged at the lower end of the body so that the shaft part of the screw can pass through the through hole, and the head part of the screw can be rotatably retained in the body; the cross rod penetrating channel can be penetrated and arranged by the cross rod; the internal thread is arranged on the inner surface of the upper end of the body; the fixing piece is provided with an external thread which is used for being connected with the internal thread of the body.
Description
Technical field
This utility model has about a kind of pedicle screws system, and is particularly to a kind of pedicle screws system that promotes osteocyte apposition growth.
Background technology
Human spine (vertebral column) includes the main nerve conduction main shaft-spinal nerves of human body (spinal cord), and can support the weight of whole body.In general, the vertebrae (vertebrae) that adult's spinal column comprises 26 separation, these vertebraes can be divided into cervical vertebra, thoracic vertebra, lumbar vertebra, recommend vertebra and caudal vertebra according to its position, place; First three is planted vertebra and comprises respectively the vertebrae that 7,12,5 joints separate, and latter two vertebra is fused into single joint vertebrae by 5 with 4 vertebraes respectively.Between each vertebrae, be connected with facet joint (facet joint) by the intervertebral disc (intervertebral disks) being formed by fibrous cartilage, with head and the trunk of support human body, make that human body can be stood, rotates, twisted, bending or layback.Therefore, when the link of vertebrae goes wrong, as degenerated or pathological changes, will cause patient's severe pain and handicapped, even lose the self-care ability of life.
Common vertebrae disease has vertebra degenerative disorders, wound to cause fractured spinal bones, tumor to cause the aging formation spinal canal stenosis of damage, vertebra, vertebral body compression fracture and the intervertebral slippage congenital or that wound causes of vertebrae.Generally speaking, modal vertebrae disease is intervertebral slippage, i.e. dislocation between vertebrae may be expressed to spinal nerve and cause sciatica when intervertebral slippage is serious, if and motor nerve injury can cause handicappedly, and long-term compressing even may cause amyotrophy.
For the slight intervertebral slippage of symptom; conventionally can adopt expectant treatment; for example can give Drug therapy (as, anti-inflammation drugs, analgesic drug product, muscle relaxant etc.), recovery treating (as hot compress, electrotherapy, infrared ray, vector disturb, slight lumbar traction etc.) or suggestion use backrest.For inapplicable expectant treatment or through the invalid patient of expectant treatment, can use operative treatment, to improve, spinal instability is fixed, spinal nerve is subject to the symptoms such as compressing and intervertebral slippage.For example can adopt laminectomy (laminectomy) by the vertebrae plate resection of narrow vertebra joint, but this kind of method tend to related to ligamenta intervertebralia important on vertebral plate also excision in the lump.Spinal fusion is applicable to the situation of intervertebral slippage especially severe, taking conventional at present pedicle screws fixed system as example, first the relative configurations such as vertebral arch and vertebral plate is excised carry out nerve decompression completely, afterwards again with the vertebra joint of the fixing pathological changes of pedicle screws system or distortion, utilize ligament and intervertebral before and after spinal column the traction action of fibrous ring between the two resetted.Implantable bone graft or apply bone transplanted cells or bone scraps or artificial bone in pedicle screws system ambient surface between these external two joint vertebraes, by the newborn effect of bone, is fused into single bone by the two vertebras joints of being fixed, and avoids the situation of intervertebral slippage.
But above-mentioned sclerotin Newborn Process needs the time of three to four months conventionally, and can be subject to the impact of factors.For instance, newborn bone may be along vertical direction growth, and the bone fusion that this kind grows wild can form pseudarthrosis.Or the contact area of vertebra and bone graft cell or chip or artificial bone is too little, cannot provides enough fusion beds (fusion bed) to supply sclerotin new life, and vertebrae cannot be merged.
In view of this, a kind of radix of vertebra screw fixed system of improvement is needed in this field badly, can improve this fixed system in current clinical practice, the issuable shortcoming of intervertebral fusion process.
Utility model content
This utility model aims to provide the simplification summary of this disclosure, so that reader possesses basic understanding to this disclosure.This utility model content is not the complete overview of this disclosure, and its purpose is not being pointed out the key/critical element of this utility model embodiment or defining scope of the present utility model.
This utility model has on the one hand about a kind of pedicle screws system, and this system provides a kind of fixture of adhering to for bone cell growth, uses and promotes the efficiency that vertebrae merges.
For reaching above-mentioned purpose, pedicle screws system of the present utility model has at least one screw, a cross bar, a body and a fixture.Described screw has a head and an axial region, on the outer surface of its middle shaft part, has screw thread, and one end of axial region and the bottom of head be connected, and the other end is apered to taper end.Outer surface at least a portion of described cross bar is rough surface.Described body has a longitudinal perforating, a cross bar penetrating via and a female thread; Outer surface at least a portion of body is rough surface.Described longitudinal perforating is located at the lower end of body, wear and pass through, and the head of screw is retained in described body rotationally for the axial region of screw; Described cross bar penetrating via can wear and pass through for cross bar; And described female thread is located on the inner surface of body upper end.Described fixture, has an external screw thread, in order to engage with the female thread of body.
According to an embodiment of the present utility model, pedicle screws system described herein can also comprise a supporting part, it is lower can couple to form a pivot with the head of described screw, and screw can be rotated with respect to described body, and the top of supporting part is used for accommodating cross bar.
According to another embodiment of the present utility model, described pedicle screws system can also comprise a holddown groove, its top and the below of described fixture couple to form a pivot, and fixture can be rotated with respect to described body, and the below of holddown groove is used for accommodating cross bar.
In optional embodiment, the material of pedicle screws system of the present utility model, can be titanium alloy, cochrome or rustless steel.
In other optional embodiments, the outer surface of described body and/or cross bar can be via mode processing such as sandblast, acid etching or sharp etchings, to form described rough surface.
According to an embodiment of the present utility model, the outer surface of described body and/or this cross bar has an artificial aggregate coat to be coated on outer surface, to form described rough surface.In optional embodiment, the material of described artificial aggregate coat is made up of phosphoric acid lime stone, calcium phosphate and calcium sulfate or its combination.
According to an embodiment of the present utility model, the outer surface of the middle section of this utility model cross bar is rough surface.For instance, the length of described middle section is about 3-30 centimetre, is preferably about 4-14 centimetre.According to another embodiment of this disclosure, its whole section of described cross bar is rough surface.
Consult below after embodiment, under this utility model, in technical field, have and conventionally know that the knowledgeable is when understanding easily essence spirit of the present utility model and other utility model objects, and this utility model technological means and the performance that adopt.
Brief description of the drawings
For above-mentioned and other objects of the present utility model, feature, advantage and embodiment can be become apparent, the description of the drawings is as follows:
Figure 1A is the schematic diagram of disassembling of the pedicle screws system 100 that arranges according to this utility model one embodiment;
Figure 1B is the combination schematic diagram of the pedicle screws system 100 of Figure 1A;
Fig. 2 is the schematic diagram of the body 200 that arranges according to another embodiment of this utility model;
Fig. 3 A is the schematic diagram of the cross bar 320A that arranges according to this utility model one embodiment;
Fig. 3 B is the schematic diagram of the cross bar 320B that arranges according to another embodiment of this utility model;
Fig. 4 A is the schematic diagram of the body 440A that arranges according to this utility model one embodiment;
Fig. 4 B is the schematic diagram of the body 440B that arranges according to another embodiment of this utility model;
Fig. 5 A is side view, illustrates the model of action of the pedicle screws system 100 arranging according to this utility model one embodiment; And
Fig. 5 B is the top view of model of action shown in Fig. 5 A.
According to usual operating type, in figure, various features and element are not drawn to scale, and its drafting mode is in order to present the specific features relevant to this utility model and element in best mode.In addition,, between different accompanying drawings, censure similar elements/components with same or analogous component symbol.
[symbol description]
Pedicle screws system 100,200
Fixture 110,210
External screw thread 112,212
Cross bar 120,220,320A, 320B
Screw 130,230
Head 132,232
Axial region 134,234
Screw thread 136,236
Body 140,240,440A, 440B
Longitudinally perforating 142,242
Cross bar penetrating via 144,244
Female thread 146,246
Holddown groove 214
Supporting part 238
Rough surface 120S, 140S, 220S, 240S, 320S, 340S, 440S
Vertebrae B
Detailed description of the invention
In order to make narration of the present utility model more detailed and complete, below for enforcement of the present utility model aspect and specific embodiment illustrative description has been proposed; But this not implements or uses unique form of this utility model specific embodiment.In embodiment, contain the feature of multiple specific embodiments and method step and its order with these specific embodiments of operation in order to construction.But, also can utilize other specific embodiments to reach identical or impartial function and sequence of steps.
Although be rough numerical value in order to define the numerical range of this utility model wider range and parameter circle, as far as possible accurately present the correlation values in specific embodiment herein.But any numerical value inevitably contains in essence because of the standard deviation due to indivedual method of testings.Herein, " approximately " be often referred to actual numerical value a special value or scope positive and negative 10%, 5%, 1% or 0.5% within.Or, within " approximately " word represents that actual numerical value drops on the acceptable standard error of meansigma methods, depending on having and conventionally know considering of the knowledgeable in technical field under this utility model.Except experimental example, unless or separately have a clear and definite explanation, all pass through the modification of " approximately " when understanding all scopes used herein, quantity, numerical value to percentage ratio (for example, in order to describe material usage, time length, temperature, operating condition, quantitative proportion and other similar persons).Therefore, unless separately there is contrary explanation, the numerical parameter that this description and appended claims disclose is all rough numerical value, and visual demand and changing.At least these numerical parameters should be interpreted as to pointed number of significant digit and apply mechanically the numerical value that general transfer method obtains.
Unless this description separately has definition, in technical field, have under the implication of science and technology vocabulary used herein and this utility model and conventionally know the knowledgeable's understanding and usual same meaning.In addition,, under the situation of discord context conflict, this description singular noun used contains several types of this noun; And also contain the odd number type of this noun when several noun used.
The purpose of this utility model is to provide a kind of pedicle screws system, and a kind of pedicle screws system that is conducive to osteocyte apposition growth particularly.Pedicle screws system of the present utility model can be applicable to the patient that vertebrae is degenerated or vertebrae is out of shape, the affected area of degenerating or being out of shape in order to fixed support vertebrae.Compared to the pedicle screws system of prior art, pedicle screws system of the present utility model through surface roughening processing, provides preferably environment to supply osteocyte apposition growth in specific part; Specifically, the roughened surface herein proposing not only provides better fusion bed environment, also bootable sclerotin new life's the direction of growth, and then make adjacent and merge through fixing vertebrae, the efficiency merging to promote vertebrae.
Referring to Figure 1A and Figure 1B, what it had summarily illustrated respectively the pedicle screws system 100 that arranges according to this utility model one embodiment disassembles schematic diagram and combination schematic diagram.
As shown in the figure, pedicle screws system 100 of the present utility model comprises at least one screw 130, a cross bar 120, a body 140 and a fixture 110, is hereby described below.
Refer to Figure 1A, screw 130 has a head 132 and an axial region 134, the wherein rounded platform-like of head 132, and diameter is greater than the diameter of axial region 134, and one end of axial region 134 is connected with the bottom of head 132, the other end is apered to taper end along a longitudinally toward downward-extension.In addition, on the outer surface of axial region 134, there is screw thread 136, in order to piercing and being fixed in bone tissue.
Body 140 is a hollow cylindrical or tubular structure.In an embodiment, body 140 outer surface middles cave inward slightly.In addition, body 140 has a longitudinal perforating 142, a cross bar penetrating via 144 and a female thread 146(Figure 1A).Longitudinally perforating 142 is located at the lower end of body 140, and its diameter is between the head 132 and axial region 134 of this screw 130; In practical application, the axial region of screw 130 134 can be through longitudinal perforating 142, and because the diameter dimension of head 132 is greater than the diameter of this longitudinal perforating 142, makes head 132 indwelling rotationally of screw 130 in this body 140 (Figure 1B).Thus, screw 130 can rotate with respect to this body 140, operates in order to user.Cross bar penetrating via 144 is that the groove (Figure 1A) that is horizontally through body 140 can wear Figure 1B by 140(for this cross bar 120).Particularly, this groove can be U-shaped or ㄩ type.Female thread 146 is located on the inner surface of these body 140 upper ends.
Fixture 110, has an external screw thread 112, and its external form, corresponding to the female thread 146 of body 140, can be threadably engaged two element.In using, after fixture 110 engages with body 140, cross bar 120 can be fixed in the cross bar penetrating via 144 of this body 140.
In this embodiment, surperficial at least a portion of cross bar 120 and body 140 is rough surface (120S, 140S), so that the environment of osteocyte apposition growth to be provided, and osteocyte can be grown along this rough surface.
In the various embodiments of this utility model, the rough surface of described body 140 and/or cross bar 120 (120S, 140S) can form via following processing mode, including but not limited to, sandblast, acid etching or sharp etching etc.In addition, those skilled in the art also can utilize known or impartial technology to carry out surface roughening processing.
Or, according to other embodiments of this disclosure, the rough surface (120S, 140S) of described body 140 and/or this cross bar 120 can be an artificial aggregate coat, and the material of described artificial aggregate coat can be phosphoric acid lime stone, calcium phosphate and calcium sulfate, or the combination of above-mentioned material.
In optional embodiment, the material of pedicle screws system 100 of the present utility model is bio-compatible material, including but not limited to, titanium alloy, cochrome or rustless steel.
Fig. 2 is the schematic diagram of disassembling of the pedicle screws system 200 that arranges according to another embodiment of this utility model.
Pedicle screws system 200 of the present utility model is similar haply to the pedicle screws system 100 shown in 1A, and difference is also to comprise a supporting part and a holddown groove.Please refer to Fig. 2, pedicle screws system 200 of the present utility model, comprises at least one screw 230, a cross bar 220, a body 240, a fixture 210, a supporting part 238 and a holddown groove 214.Wherein screw 230 has a head 232 and an axial region 234, and on the outer surface of axial region 234, has screw thread 236; Body 240 have a longitudinal perforating 242, a cross bar penetrating via 244, with a female thread 246, and fixture 210, it has an external screw thread 212.
Screw 230 described herein, cross bar 220, body 240 and fixture 210, its structure, configuration mode and material are identical with the pedicle screws system 100 shown in Figure 1A, for the sake of clarity, repeat no more herein.Described supporting part 238 and holddown groove 214 are located at respectively top and the below of cross bar 220, with this structure by the cross bar penetrating via 244 that is fixed on body 240 more firm cross bar 220.
Particularly, described supporting part 238 is used for accommodating this cross bar 220, be a groove shape and have one with the corresponding radian of this cross bar 220, make cross bar 220 can comply with this radian and fit tightly, and the lower recess of the groove of this supporting part 238 and described cross bar penetrating via 244 overlaps and arranges towards the same side.In addition, the below of supporting part 238 couples mutually and forms a pivot with the head 232 of this screw 230, and this screw 230 can be rotated with respect to body 240.Holddown groove 214 is located at the top of cross bar 220, and being used for fixing these cross bar 220 its structures and supporting part 238 similar is a groove shape, and have one with the corresponding radian of this cross bar 220, the two can be fitted tightly; Moreover the groove of holddown groove 214 and cross bar penetrating via 244 top places overlap and arrange towards the same side.In addition, described holddown groove 214 tops and fixture 210 belows couple and form a pivot, and this fixture 210 can be rotated with respect to this body 240.The design of the above pivot can make pedicle screws system 200 of the present utility model more convenient in the use, particularly makes to be fixed on the cross bar 220 in body 240, can 360 degree rotate, allow the angle that user can elastic its rotation of adjustment in the time of installing fixture.
In order to promote the efficiency of intervertebral fusion, the outer surface of the body 140,240 to pedicle screws system 100,200 of the present utility model and cross bar 120,220 carries out surface roughening processing respectively, make osteocyte can be attached to pedicle screws system 100,200 of the present utility model, and along this specific rough surface (120S, 140S, 220S, 240S) growth, make bone fusion process more completely and there is efficiency.Need know, the setting of rough surface (120S, 140S, 220S, 240S), can be according to actual behaviour in service, and the region of its distribution can be different.
Fig. 3 A is the schematic diagram of the cross bar 320A that arranges according to this utility model one embodiment.With reference to diagram, the middle section surface of this cross bar 320A is through roughening processing, to provide a rough surface 320S for osteocyte apposition growth.
Particularly, the length of this middle section is about two screws and is fixed on the spacing distance (not illustrating in figure) on cross bar 120.In one embodiment, the length of this middle section is 3-30 centimetre.For example, this length is 3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29 or 30 centimeters.One, preferably in embodiment, this length is 4-14 centimetre, includes but not limited to 4,5,6,7,8,9,10,11,12,13 or 14 centimeters.In addition, this rough surface 320S, all can by aforesaid mode process or any known or impartial technology made.In addition,, according to another embodiment, this rough surface 320S can be an artificial aggregate coat.In embodiment preferably, the material of artificial aggregate coat is calcium phosphate or calcium sulfate.
In each embodiment of the present utility model, the mean roughness (Ra) of described rough surface 320S is 20-2000 μ m.For example, this mean roughness (Ra) is 20, 40, 60, 80, 100, 120, 140, 160, 180, 200, 220, 240, 260, 280, 300, 320, 340, 360, 380, 400, 420, 440, 460, 480, 500, 520, 540, 560, 580, 600, 620, 640, 660, 680, 700, 720, 740, 760, 780, 800, 820, 840, 860, 880, 900, 920, 940, 960, 980, 1000, 1020, 1040, 1060, 1080, 1100, 1120, 1140, 1160, 1180, 1200, 1220, 1240, 1260, 1280, 1300, 1320, 1340, 1360, 1380, 1400, 1420, 1440, 1460, 1480, 1500, 1520, 1540, 1560, 1580, 1600, 1620, 1640, 1660, 1680, 1700, 1720, 1740, 1760, 1780, 1800, 1820, 1840, 1860, 1880, 1900, 1920, 1940, 1960, 1980 or 2000 μ m, one preferably in embodiment, this mean roughness (Ra) is 100-150 μ m, including but not limited to 100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149 or 150 μ m.Or mean roughness (Ra) can be other positive integers between 20-2000 μ m.
Fig. 3 B is the schematic diagram of the cross bar 320B that arranges according to another embodiment of this utility model.
In this embodiment, the outer surface of whole cross bar 320B is implemented to roughening processing, can carry out above-mentioned roughening processing via aforementioned manner or other known or impartial modes.According to another embodiment, this rough surface 320S can also be an artificial aggregate coat.In embodiment preferably, this artificial aggregate coat is calcium sulfate or calcium phosphate.In addition, the mean roughness of described rough surface 320S (Ra) as hereinbefore, one preferably this mean roughness of embodiment (Ra) be 100-150 μ m.
Fig. 4 A is the schematic diagram of the body 440A that arranges according to another embodiment of this utility model.
In this embodiment, process and formation one rough surface 440S through complete roughening on the surface of this body 440A.The surface roughening processing of described body 440A can form via aforesaid relevant treatment mode.In addition, in another embodiment, described rough surface 440S can be an artificial aggregate coat.In preferred embodiments, wherein this artificial aggregate coat is calcium sulfate or calcium phosphate.
In one embodiment, the mean roughness of described rough surface 440S (Ra) is 20-2000 μ m.For example, this mean roughness (Ra) is 20, 40, 60, 80, 100, 120, 140, 160, 180, 200, 220, 240, 260, 280, 300, 320, 340, 360, 380, 400, 420, 440, 460, 480, 500, 520, 540, 560, 580, 600, 620, 640, 660, 680, 700, 720, 740, 760, 780, 800, 820, 840, 860, 880, 900, 920, 940, 960, 980, 1000, 1020, 1040, 1060, 1080, 1100, 1120, 1140, 1160, 1180, 1200, 1220, 1240, 1260, 1280, 1300, 1320, 1340, 1360, 1380, 1400, 1420, 1440, 1460, 1480, 1500, 1520, 1540, 1560, 1580, 1600, 1620, 1640, 1660, 1680, 1700, 1720, 1740, 1760, 1780, 1800, 1820, 1840, 1860, 1880, 1900, 1920, 1940, 1960, 1980 or 2000 μ m, one preferably in embodiment, this mean roughness (Ra) is 100-150 μ m, including but not limited to 100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149 or 150 μ m.Or mean roughness (Ra) can be other positive integers between 20-2000 μ m.
Fig. 4 B is the schematic diagram of the body 440B that arranges according to another embodiment of this utility model.
In this embodiment, the surface element of this body 440B divides through roughening to be processed and formation one rough surface 440S.This rough surface S is located at body 440B mono-side, and the region of merging towards bone cell growth.Can come rough surface 440S to implement coarse surface treatment via aforementioned same procedure.In addition, described rough surface can also be an artificial aggregate coat, is preferably calcium sulfate or calcium phosphate.
In addition, the mean roughness of described rough surface 440S (Ra) as hereinbefore, one preferably this mean roughness of embodiment (Ra) be 100-150 μ m.
Referring to 5A and 5B figure.Fig. 5 A is the schematic diagram of the model of action of the pedicle screws system 100 that arranges according to this utility model one embodiment; And Fig. 5 B is the top view of model of action shown in Fig. 5 A.
In this embodiment, connect two pairs of screws 130 with cross bar 120, and respectively these two pairs of screws 130 are pierced and are fixed on the fixing vertebrae B of wish.In the time of practical operation, first, the axial region of two screws 130 134 is individually fixed in the tissue of vertebrae B, then cross bar 120 being inserted to wearing in passage of body 140 (does not illustrate in figure), again fixture 110 be installed up on body 140 accordingly and be locked, making the structure of this pedicle screws system 100 can support two vertebrae B.The body 140 of the pedicle screws system 100 after fixing and cross bar 120 can be positioned at the outside of bone tissue, the rough surface (120S, 140S) that finally osteocyte or bone scraps is coated on to pedicle screws system 100 of the present utility model is upper, makes the osteocyte can be along this rough surface (120S, 140S) apposition growth to carry out bone fusion.In addition, in other embodiments, this pedicle screws system 100 can also comprise a lateral connector (not illustrating in figure), links the cross bar 120 of parallel arranged, promotes stability and the support force of this pedicle screws system 100.
Need know, in optional embodiment, user can be wanted according to vertebrae the difference of fixed-area size and vertebrae number, can additionally increase the number of screw 130, visual user demand is adjusted the length of described cross bar 120, to be applicable to fixed-area in a big way.
Although disclosed specific embodiment of the utility model in embodiment above; so it is not in order to limit this utility model; under this utility model, in technical field, have and conventionally know the knowledgeable; under the situation departing from principle of the present utility model and spirit not; when carrying out various changes and modification to it, therefore protection domain of the present utility model is worked as with being as the criterion that appending claims was defined.
Claims (9)
1. a pedicle screws system, comprises:
At least one screw, it has a head and an axial region, wherein on the outer surface of this axial region, has screw thread, and one end of this axial region and the bottom connection of head, and the other end is apered to taper end;
One cross bar, at least a portion of its outer surface is rough surface;
One body, have a longitudinal perforating, a cross bar penetrating via and a female thread, at least a portion of its outer surface is rough surface, and wherein this longitudinal perforating is located at the lower end of body, wear and pass through for the axial region of this screw, and the head of this screw indwelling rotationally in this body; This cross bar penetrating via can wear and pass through for this cross bar; And this female thread is located on the inner surface of this body upper end; And
One fixture, has an external screw thread, in order to engage with the female thread of this body.
2. pedicle screws system as claimed in claim 1, is characterized in that, also comprises a supporting part, and its below couples to form a pivot with the head of this screw, and this screw can be rotated with respect to this body; And the top of this supporting part is in order to accommodating this cross bar.
3. pedicle screws system as claimed in claim 1, it is characterized in that, also comprise a holddown groove, its top couples to form a pivot with the below of this fixture, this fixture can be rotated with respect to this body, and the below of this holddown groove is in order to accommodating this cross bar.
4. pedicle screws system as claimed in claim 1, is characterized in that, the material of this pedicle screws system is titanium alloy, cochrome or rustless steel.
5. pedicle screws system as claimed in claim 1, is characterized in that, the outer surface of this body and/or this cross bar is through sandblast, acid etching or laser-induced thermal etching processing, to form described rough surface.
6. pedicle screws system as claimed in claim 1, is characterized in that, the outer surface of this body and/or this cross bar has an artificial aggregate coat to apply thereon, to form described rough surface.
7. pedicle screws system as claimed in claim 1, is characterized in that, the outer surface of the middle section of this cross bar is rough surface.
8. pedicle screws system as claimed in claim 7, is characterized in that, the length of the middle section of this cross bar is 3-30 centimetre.
9. pedicle screws system as claimed in claim 1, is characterized in that, whole section of this cross bar is rough surface.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW102110830A TWI572319B (en) | 2013-03-27 | 2013-03-27 | Pedicle screw system |
| TW102110830 | 2013-03-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203885595U true CN203885595U (en) | 2014-10-22 |
Family
ID=50778654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420138101.0U Expired - Fee Related CN203885595U (en) | 2013-03-27 | 2014-03-25 | Vertebral arch screw system |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP3191057U (en) |
| CN (1) | CN203885595U (en) |
| DE (1) | DE202014101403U1 (en) |
| TW (1) | TWI572319B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5542946A (en) * | 1994-05-27 | 1996-08-06 | Sofamor S.N.C. | Hook for an occipito-cervical rod or plate of an occipito-cervical osteosynthesis instrumentation |
| US7806911B2 (en) * | 2006-04-14 | 2010-10-05 | Warsaw Orthopedic, Inc. | Fixation plate and method of use |
| EP1891904B1 (en) * | 2006-08-24 | 2013-12-25 | Biedermann Technologies GmbH & Co. KG | Bone anchoring device |
| EP2221013B1 (en) * | 2009-02-20 | 2015-08-05 | Biedermann Technologies GmbH & Co. KG | Receiving part for receiving a rod for coupling the rod to a bone anchoring element and a bone anchoring device with such a receiving part |
-
2013
- 2013-03-27 TW TW102110830A patent/TWI572319B/en not_active IP Right Cessation
-
2014
- 2014-03-25 CN CN201420138101.0U patent/CN203885595U/en not_active Expired - Fee Related
- 2014-03-25 DE DE202014101403.9U patent/DE202014101403U1/en not_active Expired - Lifetime
- 2014-03-26 JP JP2014001523U patent/JP3191057U/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE202014101403U1 (en) | 2014-04-02 |
| TWI572319B (en) | 2017-03-01 |
| JP3191057U (en) | 2014-06-05 |
| TW201436758A (en) | 2014-10-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141022 Termination date: 20210325 |