CN110141344A

CN110141344A - A kind of flexible constraint formula pedicle nail of anti-explosion filaments

Info

Publication number: CN110141344A
Application number: CN201910494046.6A
Authority: CN
Inventors: 何静; 何伟义
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-06-08
Filing date: 2019-06-08
Publication date: 2019-08-20

Abstract

The present application relates to a kind of applied to the implantation material arrived used in Orthopeadic Surgery and neurosurgery, particularly as the flexible constraint formula pedicle nail for being a kind of anti-explosion filaments being laid out using side stick；It is this to use the structure type that pitman is placed on to nail seat side, it can fundamentally solve as the pedicle nail of " quick-fried silk " problem for suffering from many years, and there is lower incisura, and during implementing flexible constraint to rivet nut, restraining force is in stepped form, until realizing the switching to " dynamic is followed closely " with " fixing glue " two kinds of forms, to solve in the course of surgery, when strutting or clamping adjacent two pedicle nail, in fact it could happen that deviation, also alleviate the trouble of stock.

Description

A kind of flexible constraint formula pedicle nail of anti-explosion filaments

Technical field

The present application relates to a kind of applied to the implantation material arrived used in Orthopeadic Surgery and neurosurgery, particularly as It is the flexible constraint formula pedicle nail that quick-fried silk can be prevented using one kind of side stick layout.

Background technique

Currently, to the traditional scheme for the treatment of disc herniation and spinal canal stenosis, being in Orthopeadic Surgery and field of neurosurgery Theoretical according to " rigidly fixing fusion " for being referred to as " gold law " and matching used pedicle nail, including uniaxial follow closely and universal Nail, collectively termed as " fixing glue "；And with clinical medical development, derive a new academic school, i.e., it is " non-fused solid It is fixed " it is theoretical, meet this theoretical pedicle nail gradually received by art circle, is then referred to as " dynamic is followed closely "；Both are different The main distinction of the pedicle nail (referred to as following closely below) of type is: after the completion of operation, entirely with " fixing glue " function Pedicle nail is connected to a rigid body together with the lesion centrum being implanted by rivet nut；And there is the vertebral arch of " dynamic is followed closely " function Root nail, the lesion centrum being implanted by rivet nut then still can make micro swing, at energy with respect to nail seat and pitman Enough while backbone is protected in support, the stress for reducing adjacent segment is concentrated, to reduce the generation of Adjacent segment degeneration and overflow Prolong.

Since " fixing glue " and " dynamic is followed closely " are that respectively have its advantage, clinically, in same operation, often to make simultaneously Using the nail of this two type, Ji Shu circle is known as " mashed up ", so, it is necessary to while preparing that these two types of nails are spare at the scene, this is just Clinically add the difficulty of stock.

Moreover, the nail of these two types of types is essentially all to be provided with right above the axial line of nail seat on traditional method U-shaped opening through slot, the opening of this opening through slot, is additionally provided with the internal screw thread matched with plug screw, plug screw is needed by enough Pitman is fixed in opening through slot by oppressive force, but this is simultaneously, and plug screw can also generate certain component, by the two of the through slot that is open It is strutted outside lateral, plug screw is be easy to cause to return pine；Although using new technique in recent years, i.e., the thread form of plug screw is arranged to negative angle, To reduce the cross component force of plug screw generation to the greatest extent, but fail fundamentally to solve this problem, plug screw, which returns pine, causes pitman to fall off The malpractice of the operative failure Deng caused by, happens occasionally.

Again due to the component compositing characteristic of this class formation, incisura, (term in art circle generally can approximatively be thought, just It is the height of nail seat) generally between 16 ~ 19mm, it may be assumed that incisura is higher, increases the pain that implantation material generates muscular irritation Etc. discomforts.

Further, since one of program is to need to strut adjacent pedicle nail during operation, then fill out Enter CAGE, then clamp, is finally just locked pitman with plug screw；This in the uniaxial nail belonged in " fixing glue ", then be easy into Row, but due to scene operation and the characteristics of human spine, clamping tool can only be acted in nail seat, the nail tail of " dynamic is followed closely " in Nail seat can swing relatively, and in clamping process, be influenced by CAGE, and tail is more difficult accomplishes to keep the plumbness to nail seat for nail, The result is that affecting the performance of the functional characteristics of " dynamic is followed closely ".

How " quick-fried silk " this lead to operative failure an important factor for is inherently eliminated, meanwhile, it reduces " cut as far as possible Mark ", and it is able to achieve the mutual conversion of " fixing glue " with " dynamic is followed closely ", and the conveniently correct locking in art to " dynamic is followed closely ", this It is problem clinically in the urgent need to address.

Summary of the invention

For industry to pedicle nail clinically " anti-explosion filaments " in the urgent need to address, " drop incisura ", " interchangeable " and " Yi Suoding " four problems in the technical solution disclosed in the present patent application, obtain effective solution method: being exactly will be even The rigging position taken over the baton is arranged to " side-mounted ", i.e., the pitman for occupying incisura is set to the side of nail seat, rather than as passing The way of system is set to the centre above the axis of nail seat, this is just to reduce incisura and vacateed comparable space.

Also, since pitman is placed in side, nail seat with plug screw composition screw thread pair then can " U-shaped be opened by traditional Mouth slot " structure, improves to become and encircles shape, this just fundamentally solves the relatively weak opening through slot of structure by the lateral of plug screw Outer component and " strutting outward " is formed by " quick-fried silk " phenomenon.

Since pitman is placed in side, no longer control of the barrier plug screw to rivet nut, this is just to be arranged again among plug screw One control screw is used to control the selectivity of the bulb in rivet nut and becomes possibility, and exactly this possibility just makes this Pedicle nail disclosed in patent application has the function of " interchangeable ", thus only need to be for a nail, being just able to satisfy clinically has Required " mashed up ", also just solves the problems, such as stock.

And " dynamic is followed closely " can be switched to the function of " fixing glue " during surgery as utilizing, it is only necessary to common work Tool, it is possible to adjacent two nail be strutted or be clamped easily and keep rivet nut vertical with nail seat；Like this, the present patent application institute is public The technical solution opened just can be well solved four problems clinically in the urgent need to address.

Further, the nail seat, the upper half, outer surface have the taper matched with the inner wall of hook frame, inner cavity To be machined with the internal screw thread matched with the plug screw；Its lower half, outer surface are the cylinder with rounded corner, and in its outer surface Side, assist the groove of stick of being clamped and connected equipped with one, inner cavity is equipped with hemispherical under shed to lower end.

Still further, the plug screw, there are internal and external threads, the head in rivet nut made to control with acting on respectively Internal screw thread in the inner cavity of control screw and the nail seat matches；The outwardly extending flat upper cover in plug screw top, wherein There is groove for driver in centre, the hook frame being socketed in nail seat can be compressed, plug screw in the following, processing in one Recessed inner cavity.

Still further, it is intracavitary in this, a lens are equipped with, cylindrical flat control block is followed successively by, and Spring and central column of the line-spacing slightly larger than line footpath and the downwardly open briquetting matched with rivet nut bulb.

Still further, the hook frame is the tubular body of an inner wall belt taper, inner wall and the nail seat appearance Face matches；In the side of this tubular body, it is provided with a notch, in the top of this notch, extends outward a pressure bar Arm, pressure bar arm be equipped with a downwardly open U-lag, the superolateral folder stick groove of the nail seat that this notch is exposed, jointly with U-lag on pressure bar arm, common clamping and the fixed pitman.

Still further, the pitman continues to use the general part that conventional vertebral pedicle nails on as soon as being cylindrical bar, with Save R & D Cost；And rivet nut, also substantially continue to use general part, the lower semisection of the rivet nut, i.e. tail portion, for externally threaded Spike body, out of, the under shed of the nail seat stretches out and be implanted into patient centrum；And the upper semisection of rivet nut, i.e. head, it is in one Orbicule, and it is equipped with a plane perpendicular to tail portion axis, plane central has the blind hole matched with driver, this blind hole Interior, there are one half round pools.

Still further, the control screw, is a standard component, is placed in the internal screw thread in the plug screw center, for controlling System control block, spring and the briquetting, to reach by the gradual increase of flexible constraint power of pedicle nail presented, directly " fixing glue " is switched to from " dynamic is followed closely ".

Beneficial effect

The beneficial effect of the present patent application is exactly fundamentally to solve " quick-fried silk " problem for perplexing clinical many years；Also it is simultaneously It reduces " incisura " and provides enough spaces；In addition, the switching of two states can be also realized, so that clinically, it is only necessary to match Standby a nail, can meet the stock problem of clinically " mashed up "；And since such switching can be carried out at any time, it is more advantageous to In operation, nail is carried out the operation of " clamping " and " loosening " by adjustment, to fill the inherent advantages that part plays dynamic nail.

In conclusion the present patent application has novelty and creativeness, further, it is possible to four clinically faced solved Therefore a problem has stronger practicability, and can generate great social benefit.

Detailed description of the invention

Hereinafter, in conjunction with attached drawing and specific embodiment, further explanation explanation is made to the present patent application；

Fig. 1 is the X-Y scheme and effect picture of the present patent application；

Fig. 2 is the perspective view of the explosion of the major part of the present patent application；

Fig. 3 is the perspective view of the explosion of the part of the present patent application；

Fig. 4 is the switching schematic diagram of the two states of the present patent application；

Fig. 5 is the schematic illustration that the present patent application can solve " quick-fried silk " Yu " incisura "；

Fig. 6 is the schematic illustration that the present patent application can solve " locking " Yu " exchange "；

Wherein:

Plug screw 1；Hook frame 2；Pitman 3；Rivet nut 4；Nail seat 5；Control screw 6；Spring 7；

Control block 8；Briquetting 9；(tool -- clamper G；)

Plug screw external screw thread 11；Plug screw inner bolt hole 12；Plug screw upper cover 13；Plug screw cavity 14；

Hook frame inner wall 21；Hook frame notch 22；Hook frame pressure bar arm 23；Pressure bar slot 24；

Rivet nut head 41；Rivet nut tail portion 42；

Nail seat male cone (strobilus masculinus) 51；Nail seat internal screw thread 52；Nail seat presss from both sides stick groove 53；Nail seat under shed 54；

Briquetting Internal Spherical Surface 91；Briquetting end face 92.

Specific embodiment

In order to be easier to understand the practicability of the present patent application, attached drawing is first passed through, brief introduction is clinically required at present to be solved Four problems certainly: as shown in 5 right side effect picture of attached drawing, traditional pedicle nail is essentially all logical using opening by plug screw Screw thread on slot oppresses downwards pitman in the U-shaped opening through slot of nail seat, to reach the connection of adjacent nail；Plug screw to Under it is bigger to the active force of pitman while generated also bigger to the cross component force F of nail seat, in weaker nail seat Opening through slot upper end is deformed, and when being flared out increase to a certain extent, the cooperation of screw thread pair weakens, or even failure, this is just It is referred to as " quick-fried silk " phenomenon for perplexing Liao Shu circle many years；In addition, among Fig. 5, shown in be traditional pedicle nail two dimension Figure, pitman 3 and plug screw 1 be it is placed in the middle, necessarily occupy certain height, and the two dimension of the present patent application shown in left side Figure, the pitman 3 is moved to side, effectively vacates the space in short transverse, reduction incisura height h, up to 6 ~ 9mm。

In addition, as shown in fig. 6, why dynamic nail generates the function of " On Fluctuations promote fusion ", it is necessary to be completed in operation Afterwards, rivet nut tail portion 42, together with the centrum being implanted into, still can relative to the pitman 3 that has been integrally fixed and nail seat 5, The swing for making certain positive negative direction, shown in the nail on the left of Fig. 6；And due in the course of surgery, described in not yet locking When plug screw 1, it is necessary to clamping device G to be used, first struts adjacent nail, merging is referred to as the supporter (shown among Fig. 6) of CAGE, Since the position of clamping device G is in nail seat 5, and rivet nut 4 can be swung with respect to nail seat 5, when again by adjacent nail It clamps, and after locking plug screw 1, often will form as shown on the right, why dynamic nail can be presented the angle of oscillation of dynamic function Degree has lost half, what is more, has arrived extreme angles, this just affects the performance of the effective efficiency of dynamic nail；So if can be Strut or clamping process in so that the rivet nut 4 of the pedicle nail and nail seat 5 keep coaxial line, in the state of single shaft nail, then Situation shown in being effectively prevented from the right side of Fig. 6 occurs.

The present patent application the technical solution adopted is that: pitman 3 is arranged to " side-mounted ", to fundamentally cancel pole It is also easy to produce the structure type equipped with U-shaped opening slot of the nail seat 5 of " quick-fried silk ", main points is specifically improved and explains solution below It releases.

It can be seen that the upper of the nail seat 5 from Fig. 1 and the X-Y scheme and explosive view of the present patent application shown in Fig. 2 Half section of nail seat male cone (strobilus masculinus) 51 is matched with the inner wall 21 of the hook frame 2 with tapered；Inner cavity is to be provided with internal screw thread 52 Cavity, matched with the external screw thread 11 of the plug screw 1, thus realize the hook frame 2 being placed in nail seat 5 is locked And it is fixed；Then, the screw thread pair since the structure type of U-shaped opening slot is cancelled, with the cooperation of plug screw 1, so that it may be made into and encircle Shape, rather than traditional opening U-lag formula, this just fundamentally solves " quick-fried silk " phenomenon；Moreover, in external screw thread 11 and nail seat Screw thread pair composed by screw thread 52 need not also use the biggish negative reverse angle threads of difficulty of processing, and can be easy to using processing It is common triangular tooth-shaped, significantly reduce processing charges, in this R&D process, use general M8 ~ M10 triangular tooth Regular screw threads can reach ideal locking effect.

The hook frame 2 is a hollow cylindrical body, to be provided with one convenient for carrying out the fixation to pitman 4 jointly A notch 22, this notch precisely exposes the nail seat folder stick groove 53 in the nail seat 5, above hook frame notch 22 is corresponding, A pressure bar arm 23 is extended outward, the inner wall 21 with taper can be accurately overlapped with the axis of nail seat 5 joined together, To be accurately positioned and combine downwardly open pressure bar slot 24 and the nail seat of pressure bar arm 23 to press from both sides stick slot 53, common implementing is to connection The locking of stick 3；In this R&D process, set taper is 10 degree, can achieve the purpose that intrinsic precise positioning.

The plug screw 1 is a screw, and center is equipped with one and the inner bolt hole 12 for being referred to as control screw 6 and matching, On the top of plug screw 1, it is equipped with a plug screw upper cover 13, center is equipped with a slot for driver and utilizes spiral shell using tool Lid 13 beyond the Great Wall compress hook frame 2, to lock pitman 3；And the control screw 6, in this R&D process, it, which is arranged, is The flat screw of M4.

The rivet nut bulb 41 is constrained on the lower end of the nail seat inner cavity, and swingable angle is limited by the nail seat 5 The lower diameter to opening 54, and can be according to the requirement of different academic schools clinically and the tool of the rivet nut 4 joined together used Body specification is different, is set as 6.3 ~ 6.8mm, and the swing angle of ± (2 ~ 10 °) can be realized.

Before clinical application, the rivet nut 4 has been assemblied in the nail seat 5, and has been arranged to not deviate from, When clinical application, it is only necessary to use driver, rivet nut 4 can be implanted into the centrum of lesion, then be placed in the hook frame 2, then will Pitman 3 is placed in the pressure bar slot 24 of the hook frame 2 of adjacent nail, realizes connection；Due to hook frame inner wall 21 and nail seat male cone (strobilus masculinus) 51 are tapered in cooperation, so that the pressure bar slot 24 on hook frame 2 is in the cambered surface of half of circumference, adjust automatically or slightly Cambered surface on the folder stick groove 53 in nail seat, is formed by axial line coincidence each other, screws in nail seat when by the plug screw 1 After wall 21 and locking, plug screw upper cover 13 oppresses hook frame 2, so that folder stick groove 53 and the two cambered surfaces of pressure bar slot 24 are jointly to connection The circumference of stick 3 makees about 250 ° of containing, it is sufficient to be constrained and be locked, so that plug screw 1, hook frame 2, pitman 3 and nail seat 5 connect As an entirety, and rivet nut bulb 41, then it can make the swing of certain angle in the inner cavity of nail seat 5, around its centre of sphere, this state Under, it is presented, is exactly the function of " dynamic is followed closely ".

To meet clinically high-end clinical effectiveness, the present patent application can produce micro- play along rivet nut axial (Z axis), from And the function of dynamic nail " On Fluctuations promote fusion " theory is adequately applied；As shown in Fig. 3；The plug screw 1 To the following cylindrical cavity 14 for being arranged to an indent, the flat control block 8 is slightly larger than the spring 7 of line footpath with line-spacing (being commonly called as dredging spring) is placed in cavity 14, and the briquetting 9 is then placed in the top of rivet nut bulb 41；When locking plug screw 1, by The active force of spring 7 pushes up control block 8 to the inner cavity top surface for being close to plug screw 1 upwards, is pressing against the end face 92 of briquetting 9 downwards, and its Briquetting Internal Spherical Surface 91 then bears against rivet nut bulb 41, is in flexible constraint；And this restraining force, then depending on production spring 7 is made Line footpath and the elastic force presented；Under this state, such as the effect in the center line left side of the X-Y scheme of attached drawing 1 and the left side of attached drawing 4 It is entire to follow closely shown in figure, be in the function of " dynamic is followed closely ", and when by impact along rivet nut axis direction (Z-direction), spring 7 Cushioning effect can be played, so that rivet nut 4 can be in the play of micro Z-direction together with the centrum being implanted into, to make " dynamic The function of nail " is adequately embodied.

If the control screw 6 is oppressed downwards control block 8, the height of spring 7 by the plug screw inner bolt hole 12 Variation is generated, presented elastic force must be caused to generate variation, results then in generated briquetting Internal Spherical Surface 91 to rivet nut bulb 41 Flexible constraint power also generate variation, from this as can be seen that by be placed in and adjust control screw 6, it is clinically right to can satisfy The demand of the different rocking couples realized of " dynamic is followed closely "；And be once adjusted to extreme degree for such, i.e., described Screw 6 is controlled by control block 8, each coil of spring 7 is urged to extreme degree, is deformed into and is commonly called as " close spring " state, i.e., Each coil is mutually urgent close to and then pressing to and move down by briquetting 9, the bulb in rivet nut is finally compressed using its downward cambered surface 41, it realizes and switches to " fixing glue ", this state, such as the effect picture of the right side of the X-Y scheme center line of attached drawing 1 and attached drawing 4 Shown in right side.

In conclusion the technical solution that the present patent application is proposed, is able to solve and perplexs the " explosive of clinical boundary's many years at present The technical problems such as silk ", " incisura high ", " stock is tired " and " hardly possible locking ", and the crucial core technology measure used, i.e. " side Stick ", it is creative；It is conceived, great novelty；In clinical effectiveness, more high practicability；Moreover, above-described embodiment is The present patent application preferred embodiment, and the other embodiments of exhaustive the present patent application, therefore, as long as with the present patent application The description and the appended drawings content made by any modifications, equivalent replacements, and improvements etc., should be included in the protection of the present patent application Within the scope of.

Claims

1. the flexible constraint formula pedicle nail of a kind of anti-explosion filaments, by plug screw, hook frame, pitman, rivet nut, nail seat and control assembly institute Composition, it is characterised in that:

The pitman, for a circle clava, rigging position is placed in the side of the nail seat, for adjacent vertebral arch Root nail is connected and fixed；

The nail seat cooperates the screw thread pair of the encircling type of the plug screw, so that the institute that the plug screw will be socketed in the nail seat Hook frame compression is stated, and is accurately positioned by the contact surface with taper between hook frame and nail seat, so that the folder stick in nail seat is recessed Pressure bar arm on slot and hook frame can be fixed jointly and lock the pitman；

The control screw passes through the inner bolt hole in the plug screw center, in conjunction with a lens, goes to realize to the rivet nut and nail Restrained condition between seat, to reach the switching of reversible " dynamic is followed closely " and " fixing glue ".

2. the flexible constraint formula pedicle nail of anti-explosion filaments according to claim 1, it is characterised in that: the plug screw is equipped with Respectively with the control screw and the internal and external threads that match of nail seat inner cavity, extend a flat upper cover outside plug screw top, use Compressed in the hook frame that will be socketed in the nail seat, upper cover center is additionally provided with the groove used for driver, plug screw it is downward Face is equipped with concave hole.

3. the flexible constraint formula pedicle nail of anti-explosion filaments according to claim 1, it is characterised in that: the hook frame is one The tapered tubular body of inner wall belt, one side are provided with a notch, in the top of this notch, extend outward a pressure bar arm, Pressure bar arm is equipped with a downwardly open U-lag, for clamping and fixing the pitman.

4. the flexible constraint formula pedicle nail of anti-explosion filaments according to claim 1, it is characterised in that: the nail seat, thereon Half portion, outer surface band is tapered, and inner cavity is equipped with internal screw thread；Its lower half, outer surface are equipped with one and assist the recessed of stick that be clamped and connected Slot, inner cavity to lower end, be equipped with imperfect hemispherical cavity.

5. according to hook frame and nail seat in the flexible constraint formula pedicle nail of claim 3 and anti-explosion filaments as claimed in claim 4, It is characterized by: by the positioning of the contact surface with taper between hook frame and nail seat, pressure bar arm on hook frame it is downwardly open U-lag, the groove with nail seat outer surface, the cambered surface of the two is formed by axis coincidence, for clamp jointly and it is fixed described in Pitman.

6. the flexible constraint formula pedicle nail of anti-explosion filaments according to claim 1, it is characterised in that: the rivet nut it is upper Half portion is an orbicule, and is equipped with the plane perpendicular to its axis, and plane central is equipped with the blind hole for driver, and lower semisection is One with externally threaded spike body, for being implanted into lesion centrum.

7. the flexible constraint formula pedicle nail of anti-explosion filaments according to claim 1, it is characterised in that: the control assembly, It is made of four small parts, comprising: control screw, spring, control block and briquetting；It acts as control the rivet nut described Required rocking couple in nail seat, until carrying out dynamic to fixed mutual switching.

8. the control assembly in the flexible constraint formula pedicle nail of anti-explosion filaments according to claim 7, it is characterised in that: institute Stating control screw is a standard screws, by the cooperation of the internal screw thread with the plug screw center, controls the flat control The elastic force for moving up and down spring described in de-regulation of block, and then control constraint of the briquetting to the orbicule of the rivet nut upper half Power.

9. the control screw in the flexible constraint formula pedicle nail of anti-explosion filaments according to claim 7, it is characterised in that: can According to the clinical needs of user, whether entire surgical procedure, selection merging, to realize the reversible function of pedicle nail It can switch, and adjust the rocking couple that pedicle nail is presented.