CN101822572A - Screw holding rod, screw holding rod structure and spine internal fixing auxiliary system - Google Patents
Screw holding rod, screw holding rod structure and spine internal fixing auxiliary system Download PDFInfo
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- CN101822572A CN101822572A CN 201010119969 CN201010119969A CN101822572A CN 101822572 A CN101822572 A CN 101822572A CN 201010119969 CN201010119969 CN 201010119969 CN 201010119969 A CN201010119969 A CN 201010119969A CN 101822572 A CN101822572 A CN 101822572A
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Abstract
The invention relates to a screw holding rod, a screw holding rod structure and a spine internal fixing auxiliary system. The screw holding rod is used for clamping a pedicle screw which is in an internal fixing system and comprises a screw rod and a screw head, and is characterized by comprising a column head having a tubular cavity and two long rod-shaped columns stretching from a tube wall at one end of the column head in the same direction and in parallel, wherein the two columns are symmetrical along the central shaft of the column head; plug screws which can be injected in a channel along the length direction of the columns and the cavity of the column head are arranged on the inner sides of the two columns; connection structures connected with the external side of the screw head along the length direction of the columns into a whole are arranged on the inner sides at the free ends of the two columns; during connecting into a whole, a channel formed by the inner sides of the two columns is communicated with a channel formed by a through U-shaped notch; and the two channels with large diameter for allowing a connection rod to pass through the channel. In the screw holding rod structure, the connection rod can connect more than two injected pedicle screws very easily and a long though groove greatly simplifies rod passing operation.
Description
Technical field
The present invention relates to a kind of minimally invasive spinal surgery and merge the internal fixation operation device, especially relate to and a kind ofly hold the nail bar, hold and follow closely bar structure and spine internal fixing auxiliary system.
Background technology
The human spine is the complicated column structure that is made of vertebra, intervertebral disc and ligament, and the interaction of each several part makes spinal column have the multiple physiological function in the structure.For the patient that spinal column regression unstability, vertebral body distortion, spinal trauma or tumor of spine take place, need by surgical intervention, alleviate pain and the nervous symptoms that nerve compression that these diseases cause or articuli intervertebrales shakiness are brought by removing methods such as pathological tissues, bone-graft fusion.These surgical intervention means need be removed the tissue of some pathological changes, and the stability of spinal column is affected, and cause the spinal column unstability.
Based on above reason, need some inner fixing devices that postoperative stability in a short time is provided.For the fusion of spinal column bone grafting and the recovery of soft-tissue trauma provide stable mechanical environment.Its objective is provides strong fixing and strong supporting role, with the stability of keeping operation vertebral body sections, alleviate intervertebral pressure, promote to merge, increases the active probability of postoperative early rehabilitation.Wherein spinal column way of escape pedicle nail-stick system is a kind of important internal fixation mode, can provide preferably biomechanical stability to promote spinal fusion.Pedicle of vertebral arch is the strongest part of vertebral body, is considered to " the strength core " of vertebral body, and the correct pedicle screw of placing has the dynamic property resistance to the load on all planes, and rotation and the orthopedic fulcrum that provides of sagittal plane for correcting each vertebral body.
Common post way of escape pedicle nail-stick system is made up of pedicle screw, pitman and plug screw usually, taking place to implant pedicle screw on pathological changes or the vertebral body that sustains damage and the contiguous vertebral body, and with pitman the pedicle screw of homonymy is connected the back and fix with plug screw, the fixed form of a three-dimensional stability just can be provided.The pedicle multiple screws obtain many planes orthopedic and stable in, the minimum number of fusion sections does not need complete vertebral plate, and screw need not enter canalis spinalis, can effectively reduce the danger of nerve injury.Through the development of eighties of last century eight, the nineties, extensively approval of the ripe acquisition of this technology.
Traditional open spinal column way of escape pedicle nail-stick system, for example Moss-Miami system, TSRH system, CD Horizon system, Kaneda system etc., all adopt big otch, open surgery, operation process is longer, amount of bleeding is many, especially the muscle ligament structural damage of the spinal column way of escape is serious, post-operative complication is many for local soft tissue, and patient's financial burden heavily waits shortcoming.Wherein the most outstanding shortcoming is operative site muscle peeled off with tractive and causes soft tissue injury, and patient recovers normal muscular strength and biomechanics is stable needs long time, even can't recover, and has a strong impact on the postoperative rehabilitation effect.
Therefore, spinal surgeons attempts to realize the purpose of minimally invasive spine operation always, promptly realizes spinal operation by little otch by special tool(s).For example utilizing biochemical method or laser to melt vertebral pulp shrinks intervertebral disc to reach, alleviates the purpose of nerve compression.Enter the eighties in 20th century, the notion of minimally invasive spine operation reaches its maturity, and its advantage is day by day obvious along with the application of area of computer aided and endoscopic technique.The minimally invasive spine operation is by minimum operative incision, by the auxiliary of special instrument surgical implant accurately is placed in specific part, reduced the damage of surrounding tissue to greatest extent, made patient obtain rehabilitation, alleviated its financial burden with the shortest time.The basic fundamental means of minimally invasive spine operation becoming gradually spinal surgery.
Percutaneous cervical arc root screw internal fixing system is a kind of newer minimally invasive spine surgical technic, compares with the excellent fixed system of open nail, and the difficulty of Wicresoft's cervical arc root screw internal fixing system maximum is to implant pitman by little otch, and realizes pressurization and strut function.The most representative is the Sextant system, and this system successfully implants pedicle screw, pitman and plug screw under the condition of percutaneous Wicresoft in order to guarantee, the aid structural design is comparatively complicated.Design, need be sent into pitman in the hole of screw afterbody by sending excellent device in conjunction with forming stereochemical structure later on by adjacent screw rear syndeton, requires aiming accurately.This system's poor operation convenience, pardon is poor, high for doctor's operation technique requirement.Because the instrument complexity involves great expense, and adaptation population's scope is narrower, operating time is long simultaneously.Because the cooperation of sending rod to need implant between two adjacent vertebral bodies, so this system can only realize unisegmental fixing.Need this system can only realize that this system can't realize interpyramidal strutting and pressurization function simultaneously.
U.S. Patent Publication No. is that 2006/0247630 patent application discloses a kind of percutaneous spinal fixed system, comprise by hollow sleeve shape passage and insert first anchor log of vertebral body from first through hole skin, hollow sleeve shape passage comprises a central passage and has determined first longitudinal axis; A fixture location is passed first and is linked to each other with first anchor log through hole skin; A fixture feeder can unclamp rotatably with this fixture and be connected, and this feeder is set up and is positioned in this central passage, makes this feeder and this fixture can move longitudinally to the position of close first anchor log along the longitudinal axis; This fixture is admitted to this first direction of the longitudinal axis that is basically parallel to this sleeve shape passage in this sleeve shape passage; Along the self-movement of this longitudinal axis, this fixture with the second direction rotatable extension angled with first direction, is positioned on first anchor log this fixture by this feeder.Also comprise by second hollow sleeve shape passage from second second anchor log of inserting vertebral body through hole skin; And feeder can be sent into fixture in first and second anchor logs with a predetermined position.The disclosed fixed system of this application is owing to need send into fixture (being pitman) in the sleeve shape passage (being sleeve) of sending into anchor log (being pedicle screw), and feeder (being rod feeder) also will enter sleeve, and because telescopic diameter and limited length, therefore allow the length of the leeway of feeder operation and pitman and rotate leeway also limited, therefore, from the application, pitman can only be fixed two pedicle screws, and the structure of feeder is also very complicated simultaneously.Prior art has had by other percutaneous mouths carries out the device that multi-segmental send rod by rod feeder and the excellent localizer of nail, but, at present because the aid structure is still unreasonable, make that required precision is very high when wearing rod, cause sending the rod failure during operation easily and repeatable operation, the while complicated operation, and still can only be to two pedicle screws location of inserting.
Chinese patent application number is that 200810070062.4 patent application discloses a kind of fixed system, the double flute interface channel two parts that comprise pedicle screw and removably connect with it, the double flute interface channel is a hollow tubular, tube wall one side has full notch, 2/3 tube wall inboard, offside top has groove, and below 1/3 tube wall has down " U " shape half notch.The double flute mouth of this application double flute interface channel can adapt to the multi-segmental of pitman preferably and send into, a plurality of pedicle screws of inserting for connection provide possibility, but, the double flute interface channel is that notch and the groove of opening different length on hollow pipe are made, difficulty of processing is big, and the full notch of tube wall one side is unfavorable for and being connected of other accessories, cause unmanageable phenomenon is appearred in the operation of pedicle screw and pitman, in addition the inconsistent length of notch still the multi-segmental of pitman send into and cause certain obstacle.
Summary of the invention
In order to solve the aforementioned problems in the prior, the invention provides a kind of be convenient to that minimally invasive spine way of escape pedicle nail-stick system inserts hold the nail bar, also provide adopt that this holds the nail bar hold nail bar structure, and adopt this to hold the spine internal fixing auxiliary system of nail bar structure, it is simple in structure that this holds the nail bar, by with firm being connected of pedicle screw, can realize easily that pitman is to inserting the connection of pedicle screw more than two; This holds firm connection that nail bar structure can have no to relax with pedicle screw, afterwards pedicle screw and pitman can be easily with hold nail bar and other devices and separate, for the operation to pedicle screw and pitman provides reliable support; This spine internal fixing auxiliary system is simple in structure, a plurality of pedicle screws can be connected by pitman, can realize sending automatically rod and the switching of manually sending rod with sending excellent device and the excellent localizer of nail to be separated in case of necessity, and simple to operation, shortened operating time.
Technical scheme of the present invention is as follows:
A kind of be convenient to that internal fixation system inserts hold the nail bar, the pedicle screw that is used for the clamping internal fixation system, described pedicle screw comprises shank of screw and head of screw, the first end of described screw has the cavity volume that makes the universal rotation within it of shank of screw head, the other end is a hollow circuit cylinder, have the U-lag mouth of two perforations of allowing that pitman passes on it, described two U-lag mouths are separated into two centrosymmetric circumferential arcual pillars that are with hollow circuit cylinder, two pillar inboards have the female thread that is used for the plug screw screw-in, it is characterized in that, comprise that one has the stigma of tubular cavity, and from the parallel in the same way two elongated rod shape masts that stretch out of the tube wall of an end of described stigma, two masts are along the central shaft symmetry of described stigma, what described two masts inboard constituted can insert plug screw along the passage of bar length direction and the cavity of stigma, the free end medial surface of described two masts has to be connected along the bar length direction with the head of screw lateral surface and is the syndeton of one, and the channel connection that the U-lag mouth that makes inboard described passage that constitutes of described two masts and perforation when connecting as one constitutes, and the diameter of two passages allows that all pitman passes.
The radial position of the other end of described stigma is provided with two pin-and-holes symmetrically.
The lateral surface of described two masts is overhanging slightly along described mast free end direction respectively, forms the lateral surface with tapering.
The lateral surface of described two masts is along circumferential arc surface.
Described two masts have one section along the long female that extends of bar, and described lateral surface with tapering is the lateral surface of female.
Described female lays respectively at the middle part or the middle and upper part of two masts.
Described syndeton is the snap-in structure that matches with two column outer walls of described head of screw link of the free end inside side walls setting of two masts.
Described snap-in structure is included in the free end tangent plane that two mast free end inboards are provided with respectively, and the shape of described free end tangent plane and the distance between the surface make described two masts be suitable for clamp screws two a pillar lateral surface; Described free end tangent plane and described head of screw two pillar lateral surface are provided with the convex-concave fit structure.
Described convex-concave fit structure is that described head of screw two pillar lateral surface are symmetrically arranged with one respectively along circumferential groove near port section, accordingly, the engaging pit that is provided with away from the position of termination in the described free end tangent plane, the width of engaging pit is consistent to the length of strut end head with described groove, and the distance of described engaging pit distance two mast free end terminations is consistent with the width of a column outer wall upper groove.
The axial edge place of the coupling part that the free end of described two masts is connected with head of screw is provided with the tabs towards axis direction respectively, and the bending degree of this tabs fits tightly the section at the axial edge place of head of screw corresponding connection parts branch for its inboard.
The axial edge place of the coupling part that the free end of described two masts is connected with head of screw is provided with the tabs towards axis direction respectively, and the bending degree of this tabs is to make this tabs inboard can fit tightly the section at the axial edge place of head of screw corresponding connection parts branch.
A kind of nail bar structure of holding, it is characterized in that comprising described hold the nail bar and described hold nail bar two mast lateral surface fits can be at the described fastening sleeve of screw that slides on the nail roofbolt bar of holding.
A kind of nail bar structure of holding is characterized in that comprising and describedly holds the nail bar and at the fastening sleeve of screw that can slide at described female of the described lateral surface fit of holding nail bar two mast females.
A kind of spine internal fixing auxiliary system, it is characterized in that comprising the described nail bar structure of holding, comprise that also an arc send excellent bar, the described tail end of excellent bar that send is for holding the hollow structure of pitman, described hollow structure inboard is provided with the locking piece of fixedly connected rod, described locking piece links to each other with the excellent bolt of lock, and the excellent bolt of described lock passes and send excellent bar to arrive and pass the head end that send excellent bar, with the head end control locking piece that send excellent bar fixing and unclamp pitman.
Also comprise the excellent localizer of a shaft-like nail, one end and stigma are rotatably connected, and the excellent localizer of nail can rotated by the junction point center and in perpendicular to the collinear plane between junction point; The described head end of excellent bar that send is connected by quick change construction with the other end of the excellent localizer of described nail, and the excellent localizer of described nail is equal with the distance of passing from this axis to the head of screw pitman after described mast is connected the screwing head around the radius of the straight line between junction point rotation.
Described quick change construction is the magic chuck device for clamping.
The excellent localizer of described nail is that a vertical section is the opening support arm structure spare of U-shaped, the terminal inboard of two support arm is symmetrically arranged with two backing pins, described stigma be symmetrically arranged with at the position of the plane of symmetry that is symmetrical in two masts two with the suitable pin-and-hole of described backing pin, described U-shaped support arm is provided with the locking bolt near the position of described backing pin.
Technique effect:
Spine internal fixing auxiliary system of the present invention mainly comprises by what hold the nail bar and send that excellent bar forms holds nail bar structure, pitman and the excellent localizer of nail.Connect by quick change construction owing to follow closely excellent localizer and send between the excellent bar, send rod to take place at need when carrying out the machinery location by connected nail rod localizer, the operation doctor can separate pitman rapidly with the excellent localizer of nail, realize estimating and manually send pitman, has improved the motility of operating theater instruments; Handover operation only needs to implement by pressing button, and is easy and simple to handle fast.One of the inboard formation of two masts of holding the nail bar that the present invention holds in the nail bar structure connects elongated slot, and this elongated slot is connected with the U-lag of head of screw, send excellent bar only need with the U-lag of each pedicle screw of inserting vertebral body in same plane, just can send into by sections from other percutaneous positions with pitman easily; After passing the elongated slot of holding the nail bar at pitman, the band plug screw is passed the elongated slot of holding the nail bar be pressed into the U-lag of head of screw, pitman and LOCATION OF PEDICLE SCREW FIXATION is firm; Therefore the nail bar structure of holding of the present invention can realize the connection of pitman to the pedicle screw of inserting more than two easily, connect elongated slot and make that wearing clubs does to simplify greatly, pitman can pass in connecting the longer scope of elongated slot and hold the nail bar, avoided traditional instruments to wearing the Operating Complexity that excellent required precision height brings, reduced operation time, the nail bar of holding that has the strip mast simultaneously has certain elasticity, makes things convenient for its free end clamp screws head.
Hold the overhanging phenomenon of nail bar free end appearance in order to solve, the present invention is the little fastening sleeve of screw of distance between its its internal diameter of outside fit is than two mast free end outer surfaces, just the head of screw held of locking column bar cramp is easily realized and firm being connected of pedicle screw; The fastening sleeve of screw that can slide out fast, like a cork after operation is finished is simultaneously finished apparatus and is inserted separating of thing, has improved surgical facilitation, has shortened operating time.Particularly when directly mast being designed to have under the situation of tapering, thereby the distance that the fastening sleeve of screw that more can guarantee its outside fit tightened between two masts when sliding downwards clamps head of screw securely.
The present invention's two mast free ends are provided with snap-in structure, can easily mast and head of screw cover be connected, and head of screw is radially being limited by appropriateness; The width of the inboard engaging of mast free end pit is consistent to the length of strut end head with a column outer wall upper groove, and the distance of engaging pit distance two mast free end terminations is consistent with the width of a column outer wall upper groove, after both covers connect, brace groove is with in relative jut between the strut end head is stuck in the engaging pit, the tangent plane termination of the relative projection between engaging pit and the two mast free end terminations then is stuck in props up in the column outer wall groove, the termination of pillar just in time is stuck on the step of engaging pit and the formation of mast inwall simultaneously, moving axially of head of screw is limited, when the downward slip of the fastening sleeve of screw reduces the free-ended distance of two masts, just head of screw can limited firmly radially.Tabs towards axis direction is set on the free end of two masts, can further limits the circumferential rotation of head of screw.
Description of drawings
Fig. 1 is that spine internal fixing auxiliary system of the present invention is held nail bar, nail excellent localizer and the structural representation that send excellent bar to be connected;
Fig. 2 is the sketch map that the present invention holds a kind of embodiment of nail bar;
Fig. 3 is that holding of Fig. 2 followed closely bar sketch map in axial direction;
Fig. 4 is the sketch map that the present invention holds the another kind of embodiment of nail bar;
Fig. 5 be free end of the present invention have a convex-concave fit structure hold nail bar structural representation;
Fig. 6 has holding of groove to follow closely the bar structural representation in the middle part of the present invention;
Fig. 7 be free end of the present invention have a tabs hold nail bar structural representation;
Fig. 8 is that the present invention send excellent bar structural representation.
Fig. 9 is that the present invention follows closely the structural representation that backing pin is set on excellent localizer two support arms
Figure 10 is the structural representation that the present invention follows closely quick change construction on the excellent localizer other end
Wherein, 1-holds the nail bar; The 11-stigma; The 111-pin-and-hole; The 12-mast; 121-free end tangent plane; 122-engages pit; The 123-lateral surface; The 124-female; The 125-tabs; The 13-passage; The 14-cavity; The fastening sleeve of 2-screw; 3-send excellent bar; The 31-locking piece; 32-locks excellent bolt; The 33-quick change construction; The 331-vestibule; The hollow chuck of 332-; The 333-spring; The 334-bulge loop; The 4-pitman; 5-follows closely excellent localizer; 51-support arm end; The 52-backing pin; 53-locks bolt; The 6-pedicle screw; The 61-head of screw; The 62-shank of screw.
The specific embodiment
The present invention is described further below in conjunction with accompanying drawing:
The spine internal fixing auxiliary system of Fig. 1 comprises and holds pin structure, wherein holds pin structure and comprises that holding nail bar 1, the fastening sleeve 2 of screw and arc send excellent bar 3, also comprises a pitman 4 and the excellent localizer 5 of a shaft-like nail.Hold nail bar 1 and comprise that stigma 11 and two masts, 12, two masts, 12 ends fixedly connected with the head of screw 61 of pedicle screw 6 by syndeton, the fastening sleeve 2 of screw is enclosed within the outside of two masts 12, and can slide relatively along the bar length direction.The plug screw that is used for fixing pitman 4 and pedicle screw 6 begins from stigma 11, sends in the head of screw 61 by the passage 13 of holding 12 of 1 liang of masts of nail bar and tightens, and pitman 4 is clamped between plug screw and the shank of screw 62 immediately.Stigma 11 is rotatably connected with an end of the excellent localizer 5 of nail, and the excellent localizer 5 of nail can freely be rotated in a plane, and this plane is to pass through the mid point of axis between two junction points and perpendicular to the plane of axis between junction point.Wherein follow closely excellent localizer 5 around the radius that connects the axis rotation between two contacts with after mast 12 is connected screwing head 61, the distance that 61 pitmans pass from this axis to head of screw is equal.Send the head end of excellent bar 3 to be connected, send the tail end of excellent bar 3 fixing with pitman 4 by locking piece 31 by the other end of a quick change construction 33 with the excellent localizer 5 of nail.In order to guarantee safety, reliability and the stability of apparatus of the present invention in operation process, each parts that relates in the spine internal fixing auxiliary system can be used titanium alloy, medical stainless steel or other medical alloy material manufacture.
Bar 1 is followed closely in holding of Fig. 2, Fig. 3, comprise that one has the stigma 11 of tubular cavity 14, and from the tube wall of stigma 11 1 ends in the same way mast 12, two masts 12 of parallel two elongated rod shape of stretching out be provided for fixedly holding the female thread of following closely bar in the tube wall of stigma 11 along the central shaft symmetry of stigma 11.Have two U-lags on the tube wall of stigma 11 other ends, the bottom of two U-lags is provided for and follows closely the pin-and-hole 111 that excellent localizer 5 is rotationally connected.In order not influence the mechanical strength of stigma 11 parts, U-lag and pin-and-hole 111 need be arranged on the position relative with two masts 12.Two masts, the 12 inboard cylindrical channels 13 that constitute along the bar length direction, the cavity 14 of passage 13 and stigma 11 constitutes the inner chamber that is communicated with, and can insert the plug screw that is used for fixing pitman 4 and pedicle screw 6 by the inner chamber of this connection in use.The free end medial surface of two masts 12 has the syndeton with head of screw 61 lateral surface of pedicle screw 6 coupling, makes two masts 12 be connected along the bar length direction with head of screw 61 and is one.
Normally make owing to hold nail bar 1 by metal materials such as steel alloys, when two masts 12 have certain-length, inevitable in the overhanging phenomenon of free end generation.As shown in Figure 4, in order to address this problem among another embodiment that holds nail bar 1, the fastening sleeve 2 of outside fit screw at two masts 12, by the fastening sleeve 2 of screw sliding up and down in two mast 12 outsides, just can lock head of screw 61 easily, realize and pedicle screw 6 firm being connected by the 12 free end clampings of two masts.After two masts 12 connect by syndeton and head of screw 61, the more fastening sleeve of screw is slided into restraint location to mast 12 free end directions, block head of screw 61 firmly thereby make overhanging free end tighten up free end tangent plane 121.Can be fast after operation is finished, like a cork the fastening sleeve 2 of screw is skidded off restraint location in the other direction, finish separating of two masts 12 and head of screw 61, improved surgical facilitation, shortened operating time.
The lateral surface preferred embodiment of two masts 12 is, manufactures along mast 12 free end directions overhangingly slightly respectively at the lateral surface of two masts 12, forms the lateral surface 123 with tapering, can be convenient to the fastening sleeve 2 of screw and slide into and snap into restraint location.More preferably, the lateral surface of two masts 12 is along circumferential arc surface, forms the lateral surface 123 with circumferential radian, can be convenient to the slip that the fastening sleeve 2 of screw carries out with respect to two masts 12.
The syndeton of two masts, 12 free end medial surface shown in Figure 5 can be helicitic texture, also can be snap-in structure, is used for the lateral surface of 61 liang of pillars of free end and head of screw of two masts 12 closely is connected.The cavity 14 of passage 13 and stigma 11 constitutes the inner chamber that is communicated with, and the minimum diameter of passage 13 and cavity 14 is all greater than the diameter of pitman 4, allows that pitman 4 can freely come in and go out in the inner chamber of this connection.It among Fig. 1 and Fig. 5 the preferred snap-in structure of syndeton in the present embodiment, shape and the distance between two tangent planes 121 that snap-in structure is included in 121, two tangent planes 121 of tangent plane that two masts, 12 free end inboards are provided with in opposite directions all need satisfy the lateral surface that makes two masts 12 can closely clamp 61 liang of pillars of head of screw.In order to prevent that engaging back two masts, 12 free ends and 61 liang of pillars of head of screw from becoming flexible, can on the lateral surface of 61 liang of pillars of head of screw and two masts, 12 free end tangent planes 121, the convex-concave fit structure be set.For example, lateral surface at 61 liang of pillars of head of screw also is symmetrically arranged with one respectively along circumferential groove near port section, so accordingly, the engaging pit 122 that is provided with away from the position of termination in two masts, the 12 free end tangent planes 121, the width of engaging pit 122 is consistent to the length of strut end head with a column outer wall upper groove, and the distance of engaging pit 122 distances two masts 12 free end terminations is consistent with the width of a column outer wall upper groove.During being convenient to realize performing the operation very much, holds this snap-in structure with convex-concave fit structure nail bar 1 and quick the connection and dismounting of boring nut screw 6.
Fig. 6 is a preferred embodiment of holding two masts, 12 lateral surface of nail bar 1, has one section female 124 that extends along the pole length direction on two masts, 12 lateral surface.Aforesaid lateral surface 123 with tapering is the outer of female 124, and two females 124 among the figure lay respectively at the middle and upper part of two masts 12, also can be arranged on the middle part.Because the fastening sleeve 2 of screw can only be limited in sliding up and down in the zone of female 124, and carry out screens by lateral surface 123 with tapering, female 124 is set is convenient to limit movably distance of the fastening sleeve 2 of screw, it can effectively be located in operation process, avoided the operational risk that causes because of dropout.
For the fastening sleeve 2 of screw of the present invention, no matter be that two masts 12 form tapered configuration naturally because the longer free end of length is overhanging, still be made into lateral surface 123 specially with tapering, the fastening sleeve 2 of screw all requires in the part bar length section near stigma 11 in the part of the lateral surface of socket two masts 12, and fastening sleeve 2 interior diameters of screw are greater than the spacing of the outer surface of two masts 12 in the sliding scale; In the long section of close free-ended part bar, when fastening sleeve 2 interior diameters of screw are in free state less than this section of free end, the spacing of two masts, 12 outer surfaces, but the channel space of the fastening sleeve 2 of screw should design to such an extent that allow it from skidding off or slip into from this free end when two masts, 12 free ends being forced to close up.Preferably, two masts, the 12 outer parts that are with the fastening sleeve 2 of screw are respectively the slightly flat surface of radian, and the fastening sleeve 2 corresponding inner surfacies of screw also need to adapt with the surface of two masts 2.The cross section of fastening sleeve 2 inner surfacies of screw can be to be provided with has the playground runway shape of two relative inner groovies, two flat sidewall of such two relative inner groovies can fit with two masts, 12 edge sections respectively, increase the contact surface of fastening sleeve 2 of screw and two masts 12, thereby increase application of force effect.During for two masts, 12 middle and upper parts or middle part arranged outside female 124, the fastening sleeve 2 of screw should be positioned at female 124 near the restraint location on the free-ended edge with tapering of mast 12 under the duty.
Fig. 7 is a preferred embodiment of the free end medial surface syndeton of two masts 12, be provided with tabs 125 respectively towards axis direction at place, the both sides of the edge of free end medial surface, the bending angle of tabs 125 is right angle or obtuse angle, so that the section at the axial edge place that head of screw 61 corresponding connection parts that make tabs 125 inboards can fit tightly pedicle screw 6 are divided is avoided free end and head of screw 61 generation relative displacements when stressed simultaneously.
The arc that Fig. 8 is send excellent bar 3, and the tail end that send excellent bar 3 is provided with fixedly connected excellent 4 locking piece 31 for holding the hollow structure of pitman 4 in the hollow structure, locking piece 31 be arranged on the lock rod bolt 32 that send excellent bar 3 inside and link to each other.Lock excellent bolt 32 and pass and send excellent bar 3 to arrive to send the head end of excellent bar 3 and pass the head end that send excellent bar 3, with at the fixing of the 31 pairs of pitmans 4 of head end control locking piece that send excellent bar 3 with unclamp.Send the head end of excellent bar 3 to be connected by quick change construction 33 with the other end of the excellent localizer 5 of nail, quick change construction 33 in the present embodiment can be with existing magic chuck device for clamping, the head end that can realize sending excellent bar 3 and the sharp separation of the other end of the excellent localizer 5 of nail be connected.After two or three awl nut screws 6 hammered in cone, if spacing is too small, machinery sent rod to be difficult to carry out, and then can directly will send excellent bar 3 to separate with the excellent localizer 5 of nail, and will follow closely excellent localizer 5 and follow closely bar 1 and separate with holding.After will holding nail bar 1 and sending excellent bar 3 to disassemble, at the head end that send excellent bar 3 pitman 4 realization range estimations are installed and manually send rod.Manually send rod for convenience, can pass at the excellent bolt 32 of lock and send the part of excellent bar 3 head ends that external screw thread is set, a wood handle with the female thread that mates with this external screw thread is installed on the excellent bolt 32 of lock.Only need tighten or unclamp wood handle during operation, can be by locking the fixing of 31 pairs of pitmans 4 of excellent bolt 32 adjustment locking pieces and unclamping.
Fig. 9 is the preferred structure of the excellent localizer 5 of shaft-like nail, the opening support arm structure spare that to follow closely excellent localizer 5 be a U-shaped, terminal 51 inboards of two support arm are symmetrically arranged with two backing pins 52, the stigma 11 of holding nail bar 1 be provided with in the bottom of two U-lags 13 two with the suitable pin-and-hole 111 of backing pin.Follow closely that the position near backing pin 52 is provided with locking bolt 53 on two support arms of excellent localizer 5, be used for two backing pins 52 behind the pin-and-hole 111 that inserts stigma 11, tighten locking bolt 53 locking nails rod localizer 5 and stigma 11, both are firmly connected.Certainly, follow closely excellent localizer 5 with hold the nail being connected of bar 1 be not limited to aforesaid way, as long as nail excellent localizer 5 one ends and stigma 11 can be realized being rotationally connected, make follow closely excellent localizer 5 can pass through between two junction points mid point and perpendicular to junction point between freely rotate in the plane of axis.The other end of following closely excellent localizer 5 is fixedlyed connected with sending excellent bar 3 head ends, follows closely excellent localizer 5 after the radius of the rotation of the axis between junction point is connected the head of screw 61 of pedicle screw 6 with mast 12, and the distance that 61 pitmans pass from this axis to head of screw equates.
As shown in figure 10, the quick change construction 33 on excellent localizer 5 other ends of nail comprises vestibule 331, hollow chuck 332, the spring 333 that is arranged on excellent localizer 5 other ends of nail in the present embodiment.Wherein chuck 332 is arranged in the vestibule 331, and chuck 332 inner chambers are provided with bulge loop 334, and the size of bulge loop 334 matches with the groove that send excellent bar 3 head ends.End in vestibule 331 of chuck 332 outsides is provided with spring 333, and the other end stretches out the surface of the excellent localizer 5 of nail, forms button.Work as release button, when spring 333 was naturalness, bulge loop 334 rose and groove fit, will send excellent bar 3 head ends and excellent localizer 5 other ends of nail to fix.When compressing button, when spring 333 was tense situation, bulge loop 334 sank to decontroling groove, send excellent bar 3 head ends can free in and out the middle part of vestibule 331 and hollow chuck 332, thereby realizes sending the dismounting and the installation of excellent bar 3 head ends.In order not allow the head end and the vestibule 331 that send excellent bar 3 relatively rotate, latch also is set sending on the excellent bar 3, the pin-and-hole that is complementary in the outer surface setting of the excellent localizer 5 of nail.
Should be pointed out that the above specific embodiment can make those skilled in the art more fully understand the invention, but do not limit the present invention in any way creation.Therefore; although this description has been described in detail the invention with reference to drawings and Examples; but; those skilled in the art are to be understood that; still can make amendment or be equal to replacement the invention; in a word, all do not break away from the technical scheme and the improvement thereof of the spirit and scope of the invention, and it all should be encompassed in the middle of the protection domain of the invention patent.
Claims (17)
- One kind be convenient to that internal fixation system inserts hold the nail bar, the pedicle screw that is used for the clamping internal fixation system, described pedicle screw comprises shank of screw and head of screw, the first end of described screw has the cavity volume that makes the universal rotation within it of shank of screw head, the other end is a hollow circuit cylinder, have the U-lag mouth of two perforations of allowing that pitman passes on it, described two U-lag mouths are separated into two centrosymmetric circumferential arcual pillars that are with hollow circuit cylinder, two pillar inboards have the female thread that is used for the plug screw screw-in, it is characterized in that, comprise that one has the stigma of tubular cavity, and from the parallel in the same way two elongated rod shape masts that stretch out of the tube wall of an end of described stigma, two masts are along the central shaft symmetry of described stigma, what described two masts inboard constituted can insert plug screw along the passage of bar length direction and the cavity of stigma, the free end medial surface of described two masts has to be connected along the bar length direction with the head of screw lateral surface and is the syndeton of one, and the channel connection that the U-lag mouth that makes inboard described passage that constitutes of described two masts and perforation when connecting as one constitutes, and the diameter of two passages allows that all pitman passes.
- 2. the described nail bar of holding of claim 1 is characterized in that the radial position of the other end of described stigma is provided with two pin-and-holes symmetrically.
- 3. the described nail bar of holding of claim 1 is characterized in that the lateral surface of described two masts is overhanging slightly along described mast free end direction respectively, forms the lateral surface with tapering.
- 4. the described nail bar of holding of claim 3 is characterized in that the lateral surface of described two masts is along circumferential arc surface.
- 5. the described nail bar of holding of claim 4 is characterized in that described two masts have one section along the long female that extends of bar, and described lateral surface with tapering is the lateral surface of female.
- 6. the described nail bar of holding of claim 5 is characterized in that described female lays respectively at the middle part or the middle and upper part of two masts.
- 7. the described nail bar of holding of one of claim 1-6 is characterized in that described syndeton is the snap-in structure that matches with two column outer walls of described head of screw link of the free end inside side walls setting of two masts.
- 8. the described nail bar of holding of claim 7, it is characterized in that described snap-in structure is included in the free end tangent plane that two mast free end inboards are provided with respectively, the shape of described free end tangent plane and the distance between the surface make described two masts be suitable for clamp screws two a pillar lateral surface; Described free end tangent plane and described head of screw two pillar lateral surface are provided with the convex-concave fit structure.
- 9. the described nail bar of holding of claim 8, it is characterized in that described convex-concave fit structure is that described head of screw two pillar lateral surface are symmetrically arranged with one respectively along circumferential groove near port section, accordingly, the engaging pit that is provided with away from the position of termination in the described free end tangent plane, the width of engaging pit is consistent to the length of strut end head with described groove, and the distance of described engaging pit distance two mast free end terminations is consistent with the width of a column outer wall upper groove.
- 10. the described nail bar of holding of one of claim 1-6, the axial edge place that it is characterized in that the coupling part that the free end of described two masts is connected with head of screw is provided with the tabs towards axis direction respectively, and the bending degree of this tabs fits tightly the section at the axial edge place that the head of screw corresponding connection parts divides for its inboard.
- 11. claim 8 or the 9 described nail bars of holding, the axial edge place that it is characterized in that the coupling part that the free end of described two masts is connected with head of screw is provided with the tabs towards axis direction respectively, and the bending degree of this tabs is to make this tabs inboard can fit tightly the section at the axial edge place that the head of screw corresponding connection parts divides.
- 12. hold nail bar structure for one kind, it is characterized in that comprising one of claim 1-4 or claim 10 described hold the nail bar and described hold nail bar two mast lateral surface fits can be at the described fastening sleeve of screw that slides on the nail roofbolt bar of holding.
- 13. hold nail bar structure for one kind, it is characterized in that comprising that one of claim 5-9 or claim 11 are described holds the nail bar and at the fastening sleeve of screw that can slide at described female of the described lateral surface fit of holding nail bar two mast females.
- 14. spine internal fixing auxiliary system, it is characterized in that comprising claim 12 or the 13 described nail bar structures of holding, comprise that also an arc send excellent bar, the described tail end of excellent bar that send is for holding the hollow structure of pitman, described hollow structure inboard is provided with the locking piece of fixedly connected rod, described locking piece links to each other with the excellent bolt of lock, and the excellent bolt of described lock passes and send excellent bar to arrive and pass the head end that send excellent bar, with the head end control locking piece that send excellent bar fixing and unclamp pitman.
- 15. the described spine internal fixing auxiliary system of claim 14, it is characterized in that also comprising the excellent localizer of a shaft-like nail, one end and stigma are rotatably connected, and the excellent localizer of nail can rotated by the junction point center and in perpendicular to the collinear plane between junction point; The described head end of excellent bar that send is connected by quick change construction with the other end of the excellent localizer of described nail, and the excellent localizer of described nail is equal with the distance of passing from this axis to the head of screw pitman after described mast is connected the screwing head around the radius of the straight line between junction point rotation.
- 16. the described spine internal fixing auxiliary system of claim 15 is characterized in that described quick change construction is the magic chuck device for clamping.
- 17. the described spine internal fixing auxiliary system of claim 14, it is characterized in that the excellent localizer of described nail is that a vertical section is the opening support arm structure spare of U-shaped, the terminal inboard of two support arm is symmetrically arranged with two backing pins, described stigma be symmetrically arranged with at the position of the plane of symmetry that is symmetrical in two masts two with the suitable pin-and-hole of described backing pin, described U-shaped support arm is provided with the locking bolt near the position of described backing pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010101199692A CN101822572B (en) | 2010-03-08 | 2010-03-08 | Screw holding rod, screw holding rod structure and spine internal fixing auxiliary system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101199692A CN101822572B (en) | 2010-03-08 | 2010-03-08 | Screw holding rod, screw holding rod structure and spine internal fixing auxiliary system |
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| CN101822572A true CN101822572A (en) | 2010-09-08 |
| CN101822572B CN101822572B (en) | 2012-08-01 |
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| CN2010101199692A Active CN101822572B (en) | 2010-03-08 | 2010-03-08 | Screw holding rod, screw holding rod structure and spine internal fixing auxiliary system |
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Also Published As
| Publication number | Publication date |
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| CN101822572B (en) | 2012-08-01 |
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Assignee: Nathon Biotechnology (Beijing) Co.,Ltd. Assignor: Beijing Natong Investment Co.,Ltd. Contract record no.: 2011110000177 Denomination of invention: Screw holding rod, screw holding rod structure and spine internal fixing auxiliary system License type: Common License Open date: 20100908 Record date: 20111013 |
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