CN208942225U - A kind of dilator for the implantation of intervertebral implants - Google Patents

Abstract

The utility model discloses a kind of dilators for the implantation of intervertebral implants, including adjusting rod and two anchoring pieces nailed on for fixing to pedicle of vertebral arch screw, two anchoring pieces are arranged along the length direction of the adjusting rod and are located at the side-lower of adjusting rod, one, which is respectively equipped with, between each anchoring piece and the adjusting rod struts arm, the arm lower end that struts is connected with corresponding anchoring piece, it struts arm upper end to bend to the side where adjusting rod and be connected with adjusting rod, the adjusting rod is equipped with to strut the regulating mechanism of distance between arm described in adjusting two.The utility model have it is easy-to-use, can effectively strut, the stability of operation and safety are good, reduce the way of escape spinal operation difficulty the advantages that.

Description

A kind of dilator for the implantation of intervertebral implants

Technical field

It is main to use the utility model relates to surgical instrument more particularly to a kind of dilator for the implantation of intervertebral implants Implantation channel is established when the implantation of the intervertebrals implants such as titanium net, bone block and Invasive lumbar fusion device.

Background technique

When the backbones destructive disease such as Spondylitis, tuberculosis of spine or tumor of spine involves centrum, centrum is often resulted in Irregular destruction occurs, or even forms vomica, abscess streamer can enable multiple centrums be involved.Due to centrum front pillar, center pillar spongiosa Bone ratio is high and blood fortune is abundant, therefore destroys even more serious, larger cavity easy to form or leads to collapse of vertebra, and centrum rear pillar Involve less, sclerotin is also more fine and close, is the V-shape after being rotated by 90 ° from the focal area overall performance of patient side's view Structure, and the vital tissues structure such as spinal cord, nerve root near centrum rear pillar, therefore operable space is very narrow in art.Through It, safely and effectively will be hard and not how in lesser operating space when way of escape row backbone focal cleaning intervertebral bone graft is performed the operation Titanium net, bone block or the Invasive lumbar fusion device of rule are filled into the huge defect of front pillar, center pillar, this is always to perplex spinal surgery doctor The great difficult problem of teacher.

Traditional way needs while excision periphery sclerotin as far as possible, artificially with nerve root retracto, nerve removing Son pulls open the institutional frameworks such as spinal cord, nerve root as possible, is implanted into channel in the hope of expanding.This generic operation is very laborious and risk is high, It is careless slightly to will result in spinal cord injury, cause patient to paralyse.And only by the implantation channel that nerve root retracto is set up, no Only space is limited, and highly unstable, and patient is slightly slack to be easy for breaking off relations, and not only channel occludes again, also easily causes New damage.Know that there are huge security risks for traditional instrument, it would be highly desirable to improve.

Utility model content

The technical problems to be solved in the utility model be overcome the deficiencies of the prior art and provide it is a kind of easy-to-use, can It effectively struts, the stability of operation and safety are good, and reduce way of escape spinal operation difficulty is used for what intervertebral implants were implanted into Dilator.

In order to solve the above technical problems, the utility model uses following technical scheme:

A kind of dilator for the implantation of intervertebral implants, including adjusting rod and two nail on for fixing to pedicle of vertebral arch screw Anchoring piece, two anchoring pieces along the adjusting rod length direction arrangement and be located at the side-lower of adjusting rod, it is each described It is respectively equipped with one between anchoring piece and the adjusting rod and struts arm, the arm lower end that struts is connected with corresponding anchoring piece, support Open arms upper end bends to the side where adjusting rod and is connected with adjusting rod, and the adjusting rod, which is equipped with, to be used to adjust described in two Strut the regulating mechanism of distance between arm.

As a further improvement of the above technical scheme: the anchoring piece includes locating rod, the pedicle screw upper end Equipped with locating slot, locking nut is equipped in the locating slot, the locating rod is pressed in the positioning by the locking nut In slot, the locating rod is located at the part except locating slot equipped with interconnecting piece, and the arm lower end that struts is hollow structure, the company Socket part struts arm lower end described in being inserted in.

As a further improvement of the above technical scheme: the locating slot, and locating rod two are run through in the locating rod both ends End is equipped with positioning region, and the pedicle screw is located between the positioning region at locating rod both ends, and the interconnecting piece is located therein one Above the positioning region at end.

As a further improvement of the above technical scheme: the interconnecting piece is cone structure, and the positioning region is sheet knot Structure.

As a further improvement of the above technical scheme: the adjusting rod periphery is arranged with slider case, wherein an institute It states and struts arm and be fixedly connected with the adjusting rod, arm is strutted described in another and is fixedly connected with the slider case on adjusting rod, institute Stating regulating mechanism includes the rotating handle being set on slider case, with the hinged claw of slider case and set on claw and cunning The torsional spring on articulated shaft between dynamic shell, the adjusting rod are equipped with multiple first adjusting tooths, the rotation hand along its length For handle circumferentially arranged with multiple the second adjusting tooths for adjusting tooth engagement with described first, the slider case is equipped with through-hole, described Claw one end is across the through-hole and supports set on two neighboring first adjusting tooth, a torque arm of the torsional spring and institute It states slider case to offset, another torque arm offsets with the claw other end.

As a further improvement of the above technical scheme: along the axial direction of the rotating handle, the two of second adjusting tooth Side is respectively equipped with press head and positioning ring, and the slider case is located at described press between head and the positioning ring.

Compared with the prior art, the advantages of the utility model are: disclosed by the utility model plant for intervertebral implants The dilator entered, using pedicle screw as anchor point, impetus is more reliable, strut the distracted strength of arm by anchoring piece, Pedicle screw can be conducted by vertebra rear pillar to front pillar, center pillar, and order struts more thoroughly, and channel exposure is more abundant, while energy The effect orthopedic to front pillar, center pillar is enough played, is achieved many things at one stroke；Anchoring piece can be installed first as intermediate force transferring part and fix anchor Firmware carries out strutting operation in the state of stabilizing local centrum again, effectively avoids the secondary damage in orthopaedic procedures, and anchor Part is detachably connected with pedicle screw, convenient for according to different patients, (the pedicle screw specification that adult and child uses is not Together), operative incision size is adjusted flexibly, without replacing complete equipment；Adjusting rod is set on the side of pedicle screw Side simultaneously will strut arm and be set as bending structure, so that between two pedicle screws without any blockage, implantation channel sufficiently exposes, Operating space increases considerably, and operates convenient for patient；Using regulating mechanism adjust determine two strut between arm away from From rear, patient no longer needs to firmly maintain, and can be absorbed in surgical procedure, avoids the occurrence of distraction instrument during strutting " accidentally dropping " Or rudimentary fault such as " slipping out of the hand ".

Detailed description of the invention

Fig. 1 is dimensional decomposition structure diagram of the utility model for the dilator of intervertebral implants implantation.

Fig. 2 is the amplified schematic view of the front view of regulating mechanism in the utility model.

Fig. 3 is the schematic perspective view of the rotating handle in the utility model.

Fig. 4 is the schematic perspective view of the anchoring piece another kind embodiment in the utility model.

Each label indicates in figure: 1, pedicle screw；11, locating slot；12, locking nut；2, adjusting rod；21, shell is slided Body；22, the first adjusting tooth；23, through-hole；3, anchoring piece；31, locating rod；32, positioning region；33, interconnecting piece；4, arm is strutted；5, it adjusts Save mechanism；51, rotating handle；511, press head；512, positioning ring；52, claw；53, torsional spring；531, torque arm；54, it second adjusts Tooth.

Specific embodiment

The utility model is described in further detail below in conjunction with Figure of description and specific embodiment.

Fig. 1 to Fig. 3 shows an embodiment of the present invention, the support for the implantation of intervertebral implants of the present embodiment Device is opened, including adjusting rod 2 and two for fixing to the anchoring piece 3 on pedicle screw 1, two anchoring pieces 3 are along adjusting rod 2 Length direction arrangement and the side-lower (being lower left in Fig. 1) for being located at adjusting rod 2, set respectively between each anchoring piece 3 and adjusting rod 2 There is one to strut arm 4, struts 4 lower end of arm and be connected with corresponding anchoring piece 3, strut the lateral bending where 4 upper end of arm to adjusting rod 2 It rolls over and is connected with adjusting rod 2, adjusting rod 2, which is equipped with, to be used to adjust two regulating mechanisms 5 for strutting distance between arm 4.

This is used for the dilator of intervertebral implants implantation, and using pedicle screw 1 as anchor point, impetus is more reliable, Strutting the distracted strength of arm 4 and passing sequentially through anchoring piece 3, pedicle screw 1 can be conducted by vertebra rear pillar to front pillar, center pillar, enable support It opens more thoroughly, the exposure of implantation channel is more abundant, while can play the effect orthopedic to front pillar, center pillar, achieves many things at one stroke；Anchor Firmware 3 is used as intermediate force transferring part, can first install on two pedicle screws 1 correspondingly and fix anchoring piece 3, steady In the state of foregone conclusion portion centrum, then carries out strutting operation again, effectively avoid the secondary damage in orthopaedic procedures, and pass through anchoring The setting of part 3, convenient for according to different patients (adult different with 1 specification of pedicle screw that child uses), operative incision size Etc. being adjusted flexibly, without replacing instrumentarium；It (is left in Fig. 1 by the upper side that adjusting rod 2 is set to pedicle screw 1 Lower section) and arm 4 will be strutted be set as bending structure, so that between two pedicle screws 1 without any blockage, implantation channel is abundant Exposure, operating space increases considerably, operates convenient for patient；Using regulating mechanism 5 adjusting determine two strut arm 4 it Between distance after, patient no longer needs to firmly maintain, and can be absorbed in surgical procedure, avoids the occurrence of distraction instrument during strutting The rudimentary fault such as " accidentally dropping " or " slipping out of the hand ".

Fig. 4, the first embodiment of anchoring piece 3, including locating rod 31 specifically are referred to, 1 upper end of pedicle screw is equipped with Locating slot 11, locating slot 11 is interior to be equipped with locking nut 12, and locating rod 31 is pressed in locating slot 11 by locking nut 12, is positioned Bar 31 is located at the part except locating slot 11 equipped with interconnecting piece 33, and strutting 4 lower end of arm is hollow structure, and interconnecting piece 33 is inserted in support 4 lower end of open arms.The anchoring piece 3 of this kind of structure is conducive to the fast assembling-disassembling on pedicle screw 1, when shortening the preparation of instrument Between；Anchoring piece 3 is connect reliably with arm 4 is strutted, not easily to fall off.It is particularly suitable for that spinal injury region is longer, needs multiple segments Whole distracted patient, the length of locating rod 31 will be grown compared with second of embodiment simultaneously, may span across two o'clock pedicle screw 1.

Specifically referring to Figure 1, second of embodiment of anchoring piece 3, on the basis of the first embodiment, locating rod 31 is passed through Locating slot 11 is worn, and 31 both ends of locating rod are equipped with positioning region 32, pedicle screw 1 is located at the positioning region 32 at 31 both ends of locating rod Between, interconnecting piece 33 is located therein 32 top of positioning region of one end.The anchoring piece 3 of this kind of structure is for single pedicle screw 1 Anchoring effect it is more preferable, realization accurately strut, and can by anchoring piece 3 drive two pedicle screws 1 be located remotely from each other (correspondence Strut process) or draw close (retraction process after corresponding implantation).Preferably, positioning region 32 is using the piece for extending vertically through locating rod 31 Shape structure or ring structure set on 31 periphery of locating rod, while the size of locating plate or positioning ring is preferably greater than locating slot 11 Width and the diameter for being less than 1 upper end of pedicle screw, while improving the reliability of anchoring, occupied space is few, is conducive to hand Art operation；Interconnecting piece 33 preferably uses cone-shaped structure, convenient for strut arm 4 and connect, while also can preferably transmit and strut work Firmly.

Further, 2 periphery of adjusting rod is arranged with slider case 21, wherein one struts arm 4 and the fixed company of adjusting rod 2 It connects, another struts arm 4 and be fixedly connected with the slider case 21 on adjusting rod 2, and regulating mechanism 5 includes being set on slider case 21 Rotating handle 51 and the hinged claw 52 and the articulated shaft between claw 52 and slider case 21 of slider case 21 On torsional spring 53, adjusting rod 2 is equipped with multiple first adjusting tooths 22 along its length, and rotating handle 51 is circumferentially arranged with multiple with the Second adjusting tooth 54 of one adjusting tooth 22 engagement, slider case 21 are equipped with through-hole 23, and 52 one end of claw passes through through-hole 23 and supports Between two neighboring first adjusting tooth 22, a torque arm 531 and the slider case 21 of torsional spring 53 offset, another torque arm 531 offset with 52 other end of claw.In the present embodiment, 2 cross section of adjusting rod is rectangular configuration, and the first adjusting tooth 22, which is set to, to be adjusted 2 upper surface of bar.When needing to adjust two and strutting the distance between arm 4, rotate rotating handle 51, due to the second adjusting tooth 54 with The intermeshing of first adjusting tooth 22 so that rotating handle 51, slider case 21, be connected with slider case 21 to strut arm 4 etc. whole Body moves on adjusting rod 2, after movement in place, decontrols claw 52,52 one end of claw is revolved under the action of torsional spring 53 around articulated shaft Turning, the other end is caught between two adjacent the first adjusting tooths 22, and it limits the arm 4 that struts being connected with slider case 21 and retracts, knot Structure is simple, reliable, easy to operate.

Further, in the present embodiment, along the axial direction of rotating handle 51, the two sides of the second adjusting tooth 54 are respectively equipped with pressure Riveter 511 and positioning ring 512, slider case 21, which is located at, to press between first 511 and positioning ring 512.Wherein, pressing first 511 can be When assembly, rotating handle 51 is first passed through into slider case 21, is then pressed.In the effect of first 511 and positioning ring 512 that presses Under rotating handle 51 can be prevented to be axially moveable, the reliability of lifting means.

Although the utility model has been disclosed with preferred embodiment as above, it is not intended to limit the utility model.It is any Those skilled in the art, in the case where not departing from technical solutions of the utility model range, all using the disclosure above Technology contents many possible changes and modifications are made to technical solutions of the utility model, or be revised as the equivalent of equivalent variations Embodiment.Therefore, all contents without departing from technical solutions of the utility model, according to the utility model technical spirit to the above reality Any simple modifications, equivalents, and modifications that example is done are applied, should all be fallen in the range of technical solutions of the utility model protection.

Claims (6)

1. a kind of dilator for the implantation of intervertebral implants, it is characterised in that: including adjusting rod (2) and two for fixing to Anchoring piece (3) on pedicle screw (1), length direction arrangement and position of two anchoring pieces (3) along the adjusting rod (2) Side-lower in adjusting rod (2) is respectively equipped with one and struts arm (4) between each anchoring piece (3) and the adjusting rod (2), Arm (4) lower end that struts is connected with corresponding anchoring piece (3), struts the side bending where arm (4) upper end to adjusting rod (2) And be connected with adjusting rod (2), the adjusting rod (2) be equipped be used to adjust two described in strut the adjusting of distance between arm (4) Mechanism (5).

2. the dilator according to claim 1 for the implantation of intervertebral implants, it is characterised in that: the anchoring piece (3) Including locating rod (31), pedicle screw (1) upper end is equipped with locating slot (11), and locking screw is equipped in the locating slot (11) Female (12), the locating rod (31) are pressed in the locating slot (11) by the locking nut (12), the locating rod (31) it is located at the part except locating slot (11) and is equipped with interconnecting piece (33), arm (4) lower end that struts is hollow structure, the company Socket part (33) struts arm (4) lower end described in being inserted in.

3. the dilator according to claim 2 for the implantation of intervertebral implants, it is characterised in that: the locating rod (31) The locating slot (11) are run through at both ends, and locating rod (31) both ends are equipped with positioning region (32), and the pedicle screw (1) is located at Between the positioning region (32) at locating rod (31) both ends, the interconnecting piece (33) is located therein on the positioning region (32) of one end Side.

4. the dilator according to claim 3 for the implantation of intervertebral implants, it is characterised in that: the interconnecting piece (33) For cone structure, the positioning region (32) is laminated structure.

5. the dilator according to claim 1 or 2 or 3 or 4 for the implantation of intervertebral implants, it is characterised in that: described Adjusting rod (2) periphery is arranged with slider case (21), is fixedly connected wherein strutting arm (4) described in one with the adjusting rod (2), It struts arm (4) described in another to be fixedly connected with the slider case (21) on adjusting rod (2), the regulating mechanism (5) includes setting In the rotating handle (51) and slider case (21) hinged claw (52) on slider case (21) and it is set to claw (52) Torsional spring (53) on articulated shaft between slider case (21), the adjusting rod (2) are equipped with multiple first along its length and adjust It saves tooth (22), the rotating handle (51) is circumferentially arranged with multiple the second adjusting tooths engaged with first adjusting tooth (22) (54), the slider case (21) is equipped with through-hole (23), and described claw (52) one end passes through the through-hole (23) and supports and is set to Between two neighboring first adjusting tooth (22), a torque arm (531) of the torsional spring (53) and the slider case (21) It offsets, another torque arm (531) offsets with the claw (52) other end.

6. the dilator according to claim 5 for the implantation of intervertebral implants, it is characterised in that: along the rotating handle (51) two sides of axial direction, second adjusting tooth (54) are respectively equipped with the head that presses (511) and positioning ring (512), the sliding Shell (21) is located at described press between head (511) and the positioning ring (512).