CN205493978U - Lock nut direction pedicle of vertebral arch screw and screw lock nut thereof - Google Patents
Lock nut direction pedicle of vertebral arch screw and screw lock nut thereof Download PDFInfo
- Publication number
- CN205493978U CN205493978U CN201620116877.1U CN201620116877U CN205493978U CN 205493978 U CN205493978 U CN 205493978U CN 201620116877 U CN201620116877 U CN 201620116877U CN 205493978 U CN205493978 U CN 205493978U
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- China
- Prior art keywords
- lock nut
- screw
- pedicle screw
- guides
- screw thread
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Abstract
The utility model provides a lock nut direction pedicle of vertebral arch screw, lock nut direction pedicle of vertebral arch screw is connected including the nail body, nail seat, two arms of can breaking, the nail body and nail seat, and two arms of can breaking form the U -shaped structure to on the spot fixed connection on nail, and the internal surface of two arms of can breaking has an internal thread, article two, can break the tail end internal surface of arm for not setting up the direction section of screw thread. The utility model also provides a screw lock nut, the screw lock nut uses with lock nut direction pedicle of vertebral arch screw is supporting, the utility model discloses simple structure, the easy manufacturing is adopted the utility model discloses carry out way of escape chest lumbar vertebrae minimal access surgery, the operation is swift, simple, nimble, and the wound is little, and it is few to bleed, has reached and exceeded open operation's effect.
Description
Technical field
This utility model belongs to bone surgery medical instruments field, particularly relates to a kind of lock nut and guides pedicle screw and screw thread lock nut thereof.
Background technology
In spinal surgery, pedicle screw technique for fixing has three posts and fixes advantage, is a kind of highly developed spine surgical technique, is widely used.Operation is divided into open surgery and Minimally Invasive Surgery, particularly minimal invasion pedicle internal fixators operation, and wound is little, goes out insufficiency of blood, recovers fast, becomes following developing direction.And in operation process, it is the shortest that nail regular time is put in requirement, owing to pedicle screw of the prior art is generally shown in Fig. 1, its pedicle screw U-shaped arm female thread is covered with the inner surface of U-shaped arm always, flush opening edge, when screw thread lock nut is screwed into, the screw thread lock nut of small volume engages difficulty with female thread centering, screw thread lock nut must fit like a glove with U-shaped arm opening edge and fully aligned pedicle screw central axis direction could be screwed into smoothly, otherwise screw thread lock nut is screwed into difficulty, need repeated multiple times being screwed into, time-consuming the most long, sometimes the v that do not coincide is screwed into lock nut by force, the screw thread on arm and lock nut can be damaged, make pedicle screw fix intensity to decline, easily loosen, cause when at present the most no matter open surgery or Minimally Invasive Surgery using nail pedicle fix, all exist and be threaded into the time-consuming long problem of lock nut.
Utility model content
The purpose of this utility model is the deficiency for prior art, it is provided that one can facilitate screw thread lock nut to be quickly screwed fixing, good fixing effect, it is not easy to loosening lock nut guides pedicle screw.
Another object of the present utility model is to provide a kind of screw thread lock nut, and it can guide pedicle screw matching with lock nut and use.
The technical solution of the utility model is:
A kind of lock nut guides pedicle screw, it is characterized in that, described lock nut guides pedicle screw and includes rivet nut, nail seat, two broken arms, rivet nut is connected with nail seat, article two, broken arm is contrario fixedly connected in nail seat formation U-shaped structure, article two, the inner surface of broken arm has female thread, and the tail end inner surface of described two broken arms is the guide section being not provided with screw thread.
As further improvement of the utility model, described lock nut guides pedicle screw and guides pedicle screw for fixing axle lock nut, and rivet nut is fixing with nail seat to be connected.
As further improvement of the utility model, it is that movable axis lock nut guides pedicle screw that described lock nut guides pedicle screw, the bulb pressure pad of bulb and hollow it is provided with between rivet nut and nail seat, rivet nut is fixing with bulb to be connected, bulb is flexibly connected with nail seat, and bulb pressure pad is positioned in nail seat and is pressed on bulb；Bulb pressure pad can be by part to be fixed direct pressure holding location in the U-shaped structure of two broken arms of embedding.
As further improvement of the utility model, a length of 2-3 the reach of described guide section.
This utility model additionally provides a kind of screw thread lock nut, described screw thread lock nut and lock nut noted earlier guide pedicle screw matching and use, the outer surface of described screw thread lock nut has the external screw thread mated with broken arm inner surface female thread, and one end of screw thread lock nut has holds locking cap opening.
The beneficial effects of the utility model are:
The tail end inner surface guiding two broken arms of pedicle screw at lock nut due to this utility model is the guide section being not provided with screw thread, when matched screw thread lock nut inserts the U-shaped threadless guide section of arm tail end, screw thread lock nut just can in lock nut pedicle screw coaxial state, i.e. fit like a glove with threaded openings edge, lock nut can be threaded into smoothly.And holding locking cap opening 21 owing to one end of screw thread lock nut 2 has, the personnel of being convenient to operation use operation rod of the prior art fixing holding screw thread lock nut 2, make operation faster.This utility model solves the most time-consuming when pedicle nail screw present in prior art is threaded into lock nut but also reduces the fixing intensity of screw, the problem easily loosened, particularly when Minimally Invasive Surgery uses lock nut to guide pedicle screw through Wicresoft's skin incision, can be quick, it is threaded into lock nut exactly, destruction pedicle screw and the screw thread of screw thread lock nut can be prevented effectively from.Simple to operate, flexible, three joints or three can be met and save the fixing needs of above vertebral body.Using lock nut of the present utility model to guide pedicle screw and carry out way of escape Thoracolumbar disk Minimally Invasive Surgery, wound is little, goes out insufficiency of blood, recovers fast, can be prevented effectively from destruction pedicle screw and the screw thread of screw thread lock nut, reduces and loosen, be fully achieved and exceed the effect of open surgery.And this utility model simple in construction, easily manufacture.
Accompanying drawing explanation
Fig. 1 is the structural representation that fixing axle lock nut provided by the utility model guides pedicle screw.
Fig. 2 is the structural representation that movable axis lock nut provided by the utility model guides pedicle screw.
Fig. 3 is rivet nut and the ball head structure schematic diagram that movable axis lock nut provided by the utility model guides pedicle screw.
Fig. 4 is the structural representation of screw thread lock nut provided by the utility model.
Wherein, 1 lock nut guides pedicle screw, and 10 rivet nuts, 11 nail seats, 12 broken arms, 13 guide sections, 14 U-shaped structures, 15 bulbs, 16 bulb pressure pads, 17 recessing marks, 2 screw thread lock nuts, 21 hold locking cap opening.
Detailed description of the invention
In order to make this utility model be solved the technical problem that, technical scheme and beneficial effect clearer, below in conjunction with drawings and Examples, this utility model is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain this utility model, is not used to limit this utility model.
Embodiment 1:
The utility model of the present embodiment provides a kind of lock nut and guides pedicle screw 1, uses medical titanium alloy to be processed into.Described lock nut guides the structure of pedicle screw 1 as shown in Figure 1, including rivet nut 10, nail seat 11 and two broken long-armed 12, rivet nut 10 is connected with nail seat 11, and two broken arms 12 are contrario fixedly connected in nail seat 11 formation U-shaped structure 14, can be used for embedding pitman 2 in U-shaped structure 14.Described rivet nut 10 is provided with screw thread.Article two, broken arm tail end one segment length is threadless guide section 13, described in be not provided with a length of 2-3 the reach of guide section 13 of screw thread.It is solid construction or hollow-core construction that the lock nut that this utility model provides guides the rivet nut 10 of pedicle screw 1, as it is shown in figure 1, rivet nut 10 is connected for fixing with nail seat 11 so that rivet nut 10 can not nail seat 2 be moved relatively, forms fixing axle lock nut and guides pedicle screw.Nail seat 2 is short cylindrical shape, and two broken arms 12 are fixed with nail seat 11 and are connected.
The present embodiment additionally provides a kind of screw thread lock nut 2, described screw thread lock nut 2 and aforementioned lock nut guide pedicle screw 1 and support the use, the outer surface of described screw thread lock nut 2 has the external screw thread mated with broken arm 12 inner surface female thread, and one end of screw thread lock nut 2 has holds locking cap opening 21.The internal diameter that described lock nut guides pedicle screw 1 is identical with screw thread lock nut 2.Can be held by update rod in holding locking cap opening 21 when operated, move screw thread lock nut 2, when screw thread lock nut 2 inserts the U-shaped threadless guide section 13 of arm tail end, screw thread lock nut 2 targeted by pedicle screw central axis direction the most, fits like a glove with threaded openings edge, is threaded into lock nut 2 smoothly.
In the present embodiment, screw thread lock nut 2 and aforementioned lock nut guide pedicle screw 1 and support the use, and in spinal surgery, pedicle screw is fixed with the nail rod of pitman.
Specifically, pitman is various pitmans common in the art, including barred body and the union joint being positioned at barred body two ends.Barred body is cylinder, and barred body can embed in the U-shaped structure 14 that lock nut guides pedicle screw 1, thus forms nail rod fixed structure.Pitman can be cut into Len req according to actual needs, or bends to required radian.Screw thread lock nut 2 can be screwed in the U-shaped structure 14 of two broken arms 12 compression pitman.
The foregoing is only the preferred embodiment of utility model, not in order to limit this utility model, all any amendment, equivalent and improvement etc. made within spirit of the present utility model and principle, within should be included in protection domain of the present utility model.
Claims (5)
1. a lock nut guides pedicle screw, it is characterized in that, described lock nut guides pedicle screw and includes rivet nut, nail seat, two broken arms, rivet nut is connected with nail seat, article two, broken arm is contrario fixedly connected in nail seat formation U-shaped structure, article two, the inner surface of broken arm has female thread, and the tail end inner surface of described two broken arms is the guide section being not provided with screw thread.
Lock nut the most according to claim 1 guides pedicle screw, it is characterised in that described lock nut guides pedicle screw and guides pedicle screw for fixing axle lock nut, and rivet nut is fixing with nail seat to be connected.
Lock nut the most according to claim 1 guides pedicle screw, it is characterized in that, it is that movable axis lock nut guides pedicle screw that described lock nut guides pedicle screw, the bulb pressure pad of bulb and hollow it is provided with between rivet nut and nail seat, rivet nut is fixing with bulb to be connected, bulb is flexibly connected with nail seat, and bulb pressure pad is positioned in nail seat and is pressed on bulb；Bulb pressure pad can be by part to be fixed direct pressure holding location in the U-shaped structure of two broken arms of embedding.
4. guide pedicle screw according to the lock nut described in any one of claim 1-3, it is characterised in that a length of 2-3 the reach of described guide section.
5. a screw thread lock nut, it is characterized in that, described screw thread lock nut and the lock nut described in any one of claim 1-4 guide pedicle screw matching and use, and the outer surface of described screw thread lock nut has the external screw thread mated with broken arm inner surface female thread, and one end of screw thread lock nut has holds locking cap opening.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520101816 | 2015-02-12 | ||
| CN2015201018163 | 2015-02-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205493978U true CN205493978U (en) | 2016-08-24 |
Family
ID=56724143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620116877.1U Active CN205493978U (en) | 2015-02-12 | 2016-02-06 | Lock nut direction pedicle of vertebral arch screw and screw lock nut thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205493978U (en) |
-
2016
- 2016-02-06 CN CN201620116877.1U patent/CN205493978U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |