CN208910454U

CN208910454U - A kind of undercut mark On Fluctuations pedicle nail with pooling feature

Info

Publication number: CN208910454U
Application number: CN201820925993.7U
Authority: CN
Inventors: 何伟义
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-06-13
Filing date: 2018-06-13
Publication date: 2019-05-31
Anticipated expiration: 2028-06-13

Abstract

The utility model relates to a kind of artificial implantation for applying the treatment lumbar disc disease in bone surgery, i.e., a kind of undercut mark On Fluctuations pedicle nails with pooling feature；By to the major part in traditional pedicle screw component, improvement i.e. in the structure of button, and using the effect of the spring newly increased, make pedicle nail disclosed in the utility model, the pedicle nail with undercut mark, polyaxial simple and practical On Fluctuations function with buffer function.

Description

A kind of undercut mark On Fluctuations pedicle nail with pooling feature

Technical field

The utility model relates to a kind of artificial implantations for applying the treatment lumbar disc disease in bone surgery, specifically For, it is exactly that one kind is suitably applied in bone surgery, with different " non-solid of traditional " rigidly fixing fusion " Determine fusion " front subject in, exploring, develop used in novel pedicle nail.

Background technique

Protrusion of lumber intervertebral disc and lumbar spinal stenosis are the common diseases in modern life, traditional surgical treatment In, fusion hand " is often rigidly fixed using vertebra using while extracing interverbebral disc outstanding and expand narrow nerve root canal Art " is treated, the matched pedicle nail used, including uniaxial nail and universal nail, referred to as fixing glue；With tradition The research that deepens continuously of subject, it has been found that, if the centrum of be implanted into pedicle nail still can be opposite after operation finishes In pitman, make the swing of certain angle, it will be able to healing that is irritating and promoting diseased region；It is this kind of just gradually by academia Pedicle nail used in the theory of " the on-fixed fusion " that receives then is referred to as " dynamic is followed closely ".

Due to the concept of " dynamic is followed closely ", or in exploration, also in continuous practice, there has been proposed many schemes: Such as Patent No. CN201085680Y, the interior suspension type of entitled " bearing pin type spine follows closely stick fixing glue "；For another example Patent No. 201510173832.8, it entitled " nest mortar rail chain type replacement and fixation dynamic pedicle screw system " etc. or is that can not reach To " polyaxial " function, increase operating difficulty；It is that structure is complicated, operability is low；For another example Patent No. 201620153647.2, " a kind of On Fluctuations pedicle nail " although avoiding above-mentioned two shortcoming, is still " incisura " is excessively high.

So-called " incisura " is exactly pedicle nail after the centrum of implantation people, exposes the height outside centrum, with simply retouching It states, is exactly the height of nail seat.In conclusion clinically, in addition to require " dynamic is followed closely " have it is minimum " after the completion of implant surgery, Can still have certain swing ability " except essential characteristic, should also have the function of " polyaxial ", the structure letter that facilitate clinical manipulation Single function that is practical, having " buffer function " that can reduce impact force suffered by centrum, and require have incisura low as far as possible, so Factors are scholar clinically, are also current pendulum in Orthopeadic Surgery to the proposed requirement of " dynamic is followed closely " in ideal Clinically, technical problem urgently to be solved.

Summary of the invention

The utility model disclose it is a kind of effectively while the technical solutions of above-mentioned several technical problems can be solved, be exactly " universal nail " in " fixing glue " used in traditional " rigidly fixing fusion " is transformed, briquetting is eliminated, Spring is increased, and mainly one of part, the i.e. structure on the head of button are improved, to meet " fine motion Outside the basic function of state ", also reach while meeting " undercut mark ", " polyaxial ", it is simple and practical, suffered impact force can be reduced etc. Technical effect clinically.

The technical solution that the utility model solves the use of its technical problem is specific as follows:

Firstly, the top in spherical head of the button in traditional " universal nail " is processed into a plane, In this plane, in addition to an original blind hole being used cooperatively with driver, an annular groove is also processed.

Further, the spring is in the form of a column compressible type, and the flat shape convenient for standing vertically is processed at both ends, from And it is conveniently placed in the annular groove on the button.

Still further, the spring is placed in the annular groove, the bottom face of the spring is made permanent Property the bottom surface being fixedly connected in the annular groove, and in the state of non-loaded, the natural height of spring should stretch out The plane of the bulb screw top end.

Still further, the width of the annular groove, should be slightly larger than the line footpath of the spring, so as to the bullet Spring can make the swing of free extension and pettiness in annular groove.

Still further, the nail seat in addition to internal screw thread common to traditional " universal nail ", U-shaped through slot etc. it Outside, the bottom of U-shaped through slot is the effect for replacing the briquetting being cancelled, and goes to support the pitman, and U-shaped logical The bottom of slot should be higher than that the plane of the bulb screw top end after the assembly is completed, but should be lower than after the assembly is completed, nature Under spring top end face.

Still further, the button in spherical head, with the hollow cavity of the nail seat in interior Spherical surface is formed by a pair of of kinematic pair, uses wear-resistant coating, or with heat treatment process, makees wear-resistant processing.

Still further, being provided with a fabrication hole in the side of the bottom of the annular groove of the button, passing through This fabrication hole can be used for for the physical means such as the bottom face welding of the spring, pin being fixed on the annular The bottom of groove, to prevent spring from slipping out of annular groove.

Detailed description of the invention

Here is the explanation of each attached drawing and specific features:

Attached drawing 1 is the X-Y scheme and partial enlarged view of the utility model；

Attached drawing 2 is the effect picture of the utility model；

Attached drawing 3 is the explosive effect figure of the utility model；

Attached drawing 4 be the utility model before being placed in pitman with the two-dimentional comparison diagram after merging；

Attached drawing 5 is the two-dimensional representation of the working principle of the utility model；

Attached drawing 6 is in the utility model embodiment, for spring to be fixed to the schematic diagram of fabrication hole in a groove；

Wherein:

Button 1；Spring 2；Nail seat 3；Pitman 4；Plug screw 5；

Annular recess 11 on button；Plane 12 on button；Blind hole 13 on button；Spherical surface on button 14；

Fabrication hole 15 on button；The swing centre of sphere O of button；

The top end face 21 of spring 2；The bottom face 22 of spring 2；

The bottom 31 of U-shaped through slot in nail seat；U-shaped through slot 32 in nail seat；Internal screw thread 33 in nail seat；It is interior in nail seat Spherical surface 34

Specific embodiment

Below, in conjunction with attached drawing, the utility model is further described:

It from the X-Y scheme of attached the utility model shown in FIG. 1, may find out: eliminate the pressure in traditional fixing glue Block increases spring 2；Continue to use the plug screw 5 and pitman 4 in traditional fixing glue；In addition, the bottom of the U-shaped through slot due to nail seat 3 Portion 31 is to moving down, so that the height of entire nail seat 3 reduces about 5mm than the incisura of traditional fixing glue.

From the partial enlarged view of attached drawing 1, in figure 5 it can be seen that technical characteristic shown in the utility model: button 1 it is downward End, i.e. tail portion, it is identical as traditional fixing glue, it is one section of screw rod, is used as to fix for being implanted into the centrum of human body；Described The top in spherical head of button 1, processes a plane 12, through test of many times and comparison, in the utility model In the present embodiment, setting plane 12 is located at the top 1mm of the centre of sphere O on the head of button 1, to have foot in this plane 12 While enough planes distribute to blind hole 13 and the position for the annular recess 11 placed for spring 2 for driver, also it can guarantee Make when button 1 is swung around its mass center O and position-limiting action.

Attached drawing 2 is the effect picture of the utility model, in conjunction with attached drawing 1, so that it may be clearly seen: not yet being set in pitman 4 Fashionable, the top end face 21 of the spring 2 is the plane 12 stretched out on the button, and is higher than the U-shaped through slot Bottom 31；In the present embodiment of the utility model, by testing and doing template observation, it is believed that: h=0.4~0.6mm, H= 1.2~1.5mm is advisable；

In order to more clearly state feature shown in the utility model, attached explosive view shown in Fig. 3 has made such taste Examination: cricoid groove 11 is in together in the plane 12 of button with the blind hole 13 on button；The bottom face 22 of spring 2 and top The plane that end face 21 is processed to convenient for erectting；One fabrication hole 15 is arranged at the bottom of annular recess 11.

As shown in the left figure of attached drawing 4, when not being placed in pitman 4, the bottom 31 of U-shaped through slot and the top end face of spring 2 21 and the vertical range of the plane 12 on button be respectively H and h；And after being implanted into pitman 4 and locking plug screw 5, due to taking Disappeared briquetting, and pitman 4 is directly to be supported by the bottom 31 of U-shaped through slot, under this state, flat on pitman 4 and button Gap between face 12 is K, as shown in the right figure of attached drawing 4, i.e. K=h；

The technical effect that the working principle of the utility model, i.e. its feature can be generated, is clearly visible from attached drawing 5: when When effect of the centrum of people by external force, this external force is decomposed into the radial component Fx perpendicular to the axis of button 1 substantially With the axial thrust load Fy for the axis for being parallel to button 1；As shown in the left figure of attached drawing 5: when Fy effect, button 1 is on the whole It moves, so that the Internal Spherical Surface 34 on the spherical surface 14 and nail seat on button makees temporary separation；Spring 2 is compressed again, pitman 4 with The gap between plane 12 on button, is compressed to S from K, and exactly such compression shows that spring 2 has buffer function, i.e., Axial thrust load Fy has been absorbed, potential energy storage is converted into.

Similarly, as shown in the right of attached drawing 5, when Fx effect, button 1 can be swung around its mass center O, will lead to simultaneously Spring 2 makees bending deformation；Especially when impact force of the external force F in burst, this buffering effect is become apparent from, and when F disappears or subtracts It steps back, spring 2 will necessarily discharge the stored potential energy that has, be returned to the nature --- -- shown in 4 the right of attached drawing if this It is pooling feature possessed by the utility model.

It is so-called " incisura " shown in figure from the left side of attached drawing 5, it can approximatively think, be exactly the height Q of nail seat 3, mesh It is preceding pedicle nail, either traditional fixing glue, or the dynamic nail just to come into vogue, incisura is generally 17~ 19mm；It due to the specific size of plug screw 5 and pitman 4, is determined by its function, becomes definite value, Wu Fazai substantially Compression, having possible way only is made improvements on the head of button 1；The technical scheme adopted by the utility model is taking Disappear traditional briquetting, changes the 31 support connection stick 4 of bottom by U-shaped through slot；By the plane 12 on button 1, it is reduced to and is only above Its mass center about 1mm or so, which saves comparable spaces, and in the embodiments of the present invention, the height of j is only deficiency 3mm, that is to say, that in the embodiments of the present invention, incisura height Q, caning be controlled in 14mm or less --- --, here it is this realities With novel possessed undercut mark function.

For another example shown in the partial enlarged view of attached drawing 1, in clinical operation, even if the Intrapyramidal button of be implanted into patient 1, there are position deviations with the adjacent pedicle nail being implanted into, and (jargon clinically is known as: nail trains off；Cause adjacent The U-shaped through slot 32 of the placement pitman 4 of nail is not overlapped), operator can cross swing nail seat 3 and make a degree of rectify It is n- ----here it is " polyaxial " functions possessed by the utility model.

Through test after a period of time, it was demonstrated that " pooling feature " can efficiently reduce the malpractice of " it is disconnected to follow closely loose stick ", but The space for leaving placement spring 3 for is very limited, has practitioner to try every possible means on spring, or even because space is very little, and attempts to cancel bullet Spring；And technical solution shown in the utility model, it can cleverly solve very much this problem: exactly reduce the plane on button 12, incisura is not only reduced, but also reserve assignable space with cricoid groove 11 for the blind hole 13 on button；Ball is sunken under and The annular recess 11 for the plane 12 that head nails on, and be possibly realized to place spring 3, and to make spring 3 there is space to generate buffering And here it is this practical most novelties, the most simple and practical place of operability for the effect --- ----swung.

In the development of the utility model and template test, the central diameter of annular recess 11 selected by the present embodiment is 5mm, groove width 1mm, groove depth are 2.2~2.5mm；And the line footpath of spring 2 is 0.7~0.8mm, line-spacing about 1.5mm, spring 2 is high Degree is about that 3.5mm is appropriate, and under this parameter, pedicle nail shown in the utility model obtains comparatively ideal clinical effectiveness.

Since the spherical surface 14 on button and the Internal Spherical Surface 34 in nail seat form one group of kinematic pair, in this described group movement On secondary contact surface, in addition coating or the surface treatment of abrasion can be reduced, then it can mitigate the mutual abrasion occurred.

It is worth noting that, as previously mentioned, the theory of " on-fixed fusion ", still in continuous exploration and practice, and " On Fluctuations promote fixed fusion " and " non-fused fixation " etc. belong to the different branches in this theory, the main distinction It is that the former is the swing using pettiness, goes the healing of stimulation wound；And the latter is then to go to promote to perform the operation using biggish swing Centrum and adjacent centrum afterwards, generate good interaction, so that diseased region be avoided to extend；And as specific swing angle, Or during one is constantly discussed, and technical solution shown in the utility model, it can also generate and meet both the above The technical effect of probing direction；As shown in the figure on the right of attached drawing 4, as long as adjusting on bottom 31 and the button of U-shaped through slot The gap K of plane 12, and the parameter of corresponding spring 2, then can reach different swing angles.

In the embodiments of the present invention, as K=0.3~0.5mm, swing angle is about 2~4 degree；And work as K=1 ~1.5mm or so, then swing angle is up to 8~12 degree；From this it is found that no matter the development of the theory of " on-fixed fusion ", It is that court's " fixed fusion of On Fluctuations promotion " or court " non-fused fixation " direction are developed, also no matter required swing angle quantifies As a result how, the utility model need to only adjust certain parameters, can meet its clinical needs.--- -- this be also the utility model Possessed perspective place.

It is attached shown in fig. 6 to be: spring 2 being fixed on to one of the method for bottom surface of annular recess 11, i.e., drills out one in side The bottom face 22 of spring 2 is permanently attached to the bottom surface of annular recess 11 with welding or pin etc. by a fabrication hole, to prevent Only it falls off.

Above-described embodiment is the preferred embodiments of the present invention, other its all principles and basic structure and the present embodiment phase It is same or approximate, within scope of protection of the utility model.

Claims

1. a kind of undercut mark On Fluctuations pedicle nail with pooling feature, including plug screw, pitman, nail seat, spring and button, It is characterized by: the button to upper end, i.e. head, in spherical, top processes a plane, on that plane, As soon as equipped with an annular groove, the spring is placed in this groove.

2. pedicle nail according to claim 1, it is characterised in that: the spring is in the form of a column compressible type, and both ends It is processed into the flat shape convenient for standing vertically.

3. pedicle nail according to claim 2, which is characterized in that the spring is placed in the annular groove Afterwards, the bottom face of spring should make with the bottom of groove it is permanent be fixedly connected, and the natural height of spring should stretch out in described Bulb screw top end plane.

4. pedicle nail according to claim 1, it is characterised in that: the width of the slot of the annular groove on the button Degree, should be slightly larger than the spring line footpath, it can so that the spring in the groove, make free extension with it is micro- It is few to swing.

5. pedicle nail according to claim 1, it is characterised in that: the center of the plane on the top of the button, The blind hole being used cooperatively equipped with one with driver；The button to lower end, i.e. tail portion, be outer surface tool threaded one Section screw rod.

6. pedicle nail according to claim 1, it is characterised in that: the nail seat is a hollow cylindrical body, in Bottom in cavity, in Internal Spherical Surface, the head fits with the button, and the tail portion of the button, from nail seat Lower section is pierced by.

7. pedicle nail according to claim 6, it is characterised in that: the top of the nail seat is equipped with internal screw thread, with institute The plug screw stated matches, and in the vertical direction of the axis of the nail seat, is provided with a U-shaped through slot, the bottom of U-shaped through slot, For supporting the pitman.

8. pedicle nail according to claim 7, it is characterised in that: the bottom of the U-shaped through slot in the nail seat, Ying Gao In the plane of the bulb screw top end after the assembly is completed, but should be lower than the top end face of spring under natural conditions.

9. pedicle nail according to claim 1, it is characterised in that: what it is in the button is in spherical head and institute Being formed by a pair of of kinematic pair in Internal Spherical Surface for the hollow cavity bottom for the nail seat stated, makees wear-resistant surface treatment.

10. pedicle nail according to claim 1, it is characterised in that: on the button, the annular groove Bottom side, a fabrication hole is provided with, for being fixed on the means such as the bottom face welding of the spring, pin The bottom of the annular groove.