CN203815564U - Multifunctional bone screw used in poor bone condition - Google Patents
Multifunctional bone screw used in poor bone condition Download PDFInfo
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- CN203815564U CN203815564U CN201420125524.9U CN201420125524U CN203815564U CN 203815564 U CN203815564 U CN 203815564U CN 201420125524 U CN201420125524 U CN 201420125524U CN 203815564 U CN203815564 U CN 203815564U
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- screw
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- rivet nut
- cylindrical hollow
- locking
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Abstract
The utility model discloses a multifunctional bone screw used in a poor bone condition. The multifunctional bone screw is composed of an outer screw and a self-locking type distraction rod, wherein the outer screw is formed by a screw body and a base into a whole; the interior of the screw is a cylindrical hollow part; a crack, cut open along the vertical direction of the screw body, is formed in the tip of the screw body; round gradient interface reinforcing holes are formed symmetrically along the screw pitch of the outer screw on the crack at intervals and are communicated with the cylindrical hollow part; the hole diameters of the gradient interface reinforcing holes are decreased gradually from the tip part of the screw body backwards; the self-locking type distraction rod is a cylinder, and the diameter of the self-locking type distraction rod is slightly smaller than the inner diameter of the cylindrical hollow part in the screw body; the front end of the self-locking type distraction rod is in a shape of a taper, and an inward V-shaped groove is formed in the back part of the taper; the self-locking type distraction rod is consistent with the cylindrical hollow part in the screw body after being placed into the cylindrical hollow part in the screw body; the crack in the screw body is expanded and meanwhile the self-locking is realized; the multifunctional bone screw can achieve the firm fixating surgery effect in the poor bone condition.
Description
Technical field
This utility model relates to medical equipment technical field, relates to a kind of bone screw, particularly relates to a kind of for the not good Multifunctional bone screw of sclerotin condition.
Background technology
The interior technique for fixing of bone screw is widely used in spinal internal fixation system and corrects the vertebral fracture and the congenital malformation etc. that are caused by degenerative change, wound, inflammation, tumor etc.But due to increasing the weight of of population aging trend in global range, the continuous increase of sufferers of osteoporosis face taking the attenuating of bone amount as feature and inflammation, tumor etc. all can cause the sclerotin change of patient's whole body or local skeleton.Technique for fixing is the stability that the hold that strengthens bone and screw by the firm grappling of screw and bone maintains the spinal internal fixation system including screw in screw, realizes that correcting vertebral is fractured and lopsided object.Cause making the hold of screw to decline but the change of patient's sclerotin that above-mentioned reason causes can cause the adhesion of screw and bone to reduce, thereby affect recent surgical effect, the corresponding increase of screw loosening rate at a specified future date simultaneously.
Clinical conventional traditional pedicle screw, is only to rely on the screw thread of screw that screw is screwed in after vertebral body, relies on the interaction between screw thread and vertebral bone to realize screw controlling in bone.But in the situation that the sclerotin conditions such as osteoporosis are not good, screw and bone are difficult to mutual closely knit combination, thereby the incidence rate of becoming flexible, deviate from of screw is increased, operation in the recent period and long-term effect all can not effectively be ensured, patient carries out the probability that secondary overhauls and increases.In order to overcome the probability of screw loosening in the not good situation of sclerotin condition, clinical conventional prevention screw loosening method is in screw nail road, to pour into bone cement to increase the hold of screw at present, in Dan Ding road, directly road is followed closely in the strengthening of perfusion bone cement entirety, the uncontrollable easy generation bone cement seepage of bone cement consumption, form " sclerotin-cement-screw " secondary interface, long-term less stable simultaneously.
The data-searching of doing according to applicant, struts the local sclerotin in compacting nail road there are no screw up to now and strengthens screw interface simultaneously, the bone screw at side opening point-like strengthening screw interface.
Summary of the invention
The defect or the deficiency that exist for above-mentioned prior art, the purpose of this utility model is, a kind of not good Multifunctional bone screw of sclerotin condition that is applicable to is provided, this Multifunctional bone screw can be by osteoporosis, inflammation, on the one hand can be after screw screws in when sclerotin condition that the causes of disease such as tumor cause is not good, inject bone cement by screw hollow bulb, make bone cement flow out to nail road along rivet nut gradation type side opening, realize the interface enhancing of point-like, the bone cement that solidifies rear one-tenth point-like flowing out by side opening, in locally embedding nail road sclerotin, realize the effect of point-like riveted, strengthen the retentivity of screw in the not good skeleton of sclerotin, bone screw struts rod by self-locking after screwing in and struts the not good sclerotin of bone screw compacting nail road local conditions on the other hand, thereby interface, Shi Ding road bone density increases the interaction strengthening between nail road bone interface and screw, increase the hold of screw, realize firm fix of screw in the not good bone of sclerotin, maintain the stability of internal fixation system.
In order to realize above-mentioned task, the technical solution that this utility model adopts is:
For the not good Multifunctional bone screw of sclerotin condition, it is characterized in that, strut rod by male screw thread and self-locking and form, wherein, male screw thread is made up of rivet nut and base, has the screw thread supporting with spinning head on base;
Described rivet nut has external screw thread, in rivet nut, is cylindrical hollow portion, diminishes and is transited into the inverted frustum of a cone at the caliber of cylindrical hollow subordinate end, and frustum of a cone lower end is an obtuse angle incisura;
There is the crack of cutting along the rivet nut longitudinal axis at the point of rivet nut, on crack, be arranged with circular gradation type interface enhancing hole along external screw thread pitch interval, this interface enhancing hole communicates with cylindrical hollow portion, and the aperture in gradation type interface enhancing hole is reduced backward successively by rivet nut point;
It is cylinder that described self-locking struts rod, diameter is more smaller than rivet nut inner circular column hollow bulb internal diameter, it is taper that self-locking struts nose, has an inside v-depression in tapered rear, after self-locking struts rod to insert the cylindrical hollow portion of rivet nut with rivet nut in cylindrical hollow portion agree with; In the crack while strutting in rivet nut, in v-depression and rivet nut, the obtuse angle incisura of lower end is realized self-locking.
Other feature of the present utility model is:
The length in described crack is to start from the point of rivet nut the 2.5cm that extends back.
Described gradation type interface enhancing hole is 3 pairs, and position is to start to be followed successively by 1.5mm, 1.2mm, 0.9mm from the point of rivet nut.
The internal diameter of described cylindrical hollow portion is 1.8mm.
It is 1.5mm that described self-locking struts excellent diameter.
Of the present utility model for the not good Multifunctional bone screw of sclerotin condition compared with prior art, have the following advantages:
1, on crack, be arranged with circular gradation type interface enhancing hole along external screw thread pitch interval and can effectively control the consumption of bone cement, reduce perfusion cement augmentation in tradition nail road and follow closely the risk of bone cement seepage in road technology, and reduce thus the incidence rate of the postoperative complication being caused by bone cement seepage.According to hydromechanical feature, adopt the pass design of gradation type, aperture from tail end to most advanced and sophisticated Strengthening Hole increases gradually, the amount that effectively ensures the bone cement of the bone cement Strengthening Hole outflow ascending from aperture increases gradually, make bone cement distribution gradient, the bone cement that screw-tipped distributes is maximum, and the bone cement of formation solidifies strengthening point maximum, effectively avoid the tip of screw to swing, stop the generation of screw loosening.In addition, after bone cement solidifies, form the overall structure of " have in nail in bone cement, bone cement and have nail ", avoid the formation of simple " sclerotin-bone cement-screw " secondary interface, nail road invigoration effect is better than conventional art.
2, rivet nut front end is the expansible crack of cutting along the rivet nut longitudinal axis, screw inside is hollow design, front and back, hollow aperture are different and become the transition of inverted conical platform shape, and inverted frustum of a cone lower end incisura can strut the v-depression formation self-locking of excellent lower end with self-locking and strut screw.After screw struts, can compacting follow closely the sclerotin of part, road, strengthen the hold of screw in the not good skeleton of sclerotin, avoid the screw loosening good do not caused because of sclerotin.
3, to strut rod be that a front end is the cylindrical-shaped structure of cone point to self-locking, cone point can ensure that self-locking struts rod and injects and make self-locking strut rod after bone cement can to squeeze into fast smoothly at screw hollow bulb, avoids bone cement to inject after fixing process self-locking and struts rod and implant difficulty; It is smaller compared with screw rivet nut internal diameter that self-locking struts excellent diameter, implants after rivet nut and can accurately agree with the interior hollow bulb of rivet nut; The space that self-locking struts between rod and rivet nut is filled by bone cement; Self-locking struts excellent tapered front end rear portion an inside v-depression, when self-locking struts excellent drivescrew hollow bulb to strut crack can with the lower end incisura self-locking of rivet nut Inner Front End inverted conical platform.Screw and self-locking strut after excellent self-locking, self-locking strut rod forever insert in rivet nut, can ensure that rivet nut struts part can be because the portion's of strutting retraction that screw self metallic elastic characteristic and external pressure cause affect screw fixed effect, simultaneously because of screw and self-locking strut rod realize self-locking also avoid self-locking strut rod to rivet nut front outstanding generation perform the operation surprisingly.
Brief description of the drawings
Fig. 1 is of the present utility model for the not good Multifunctional bone screw overall structure schematic diagram of sclerotin condition;
Fig. 2 is Multifunctional bone screw entirety top view;
Fig. 3 is male screw thread overall structure schematic diagram;
Fig. 4 is male screw thread generalized section;
Fig. 5 is that male screw thread front end can strut design diagram;
Fig. 6 is that self-locking struts excellent overall structure schematic diagram;
Fig. 7 is that self-locking struts excellent generalized section;
Fig. 8 is that self-locking struts rod implantation male screw thread generalized section (not self-locking state);
Fig. 9 is that self-locking struts excellent self-locking side and generalized section.
Below in conjunction with drawings and Examples, the utility model is described in further detail, but this utility model is not limited to these embodiment.
Detailed description of the invention
Shown in Fig. 1～Fig. 9, the present embodiment provides a kind of for the not good Multifunctional bone screw concrete structure of sclerotin condition, struts rod 2 and forms, wherein by male screw thread 1 and self-locking, male screw thread 1 forms entirety by rivet nut 11 and base 12, has the screw thread supporting with spinning head 3 on base 12;
Rivet nut 11 has the external screw thread 13 under screw, in rivet nut 11, is cylindrical hollow portion 16, diminishes and is transited into the inverted frustum of a cone 17 at the caliber of cylindrical hollow portion 16 lower ends, and the frustum of a cone 17 lower ends are an obtuse angle incisura 18;
There is the crack 15 of cutting along rivet nut 11 longitudinal axis at the point of rivet nut 11, on crack 15, be arranged with circular gradation type interface enhancing hole 14 along external screw thread 13 pitch intervals, this interface enhancing hole 14 communicates with cylindrical hollow portion 16, and the aperture in gradation type interface enhancing hole 14 is reduced backward successively by rivet nut 11 points;
It is cylinders that self-locking struts rod 2, diameter is more smaller than rivet nut 11 inner circular column hollow bulb 16 internal diameters, the front end that self-locking struts rod 2 is taper 21, have an inside v-depression 22 at taper 21 rear portions, after self-locking struts rod 2 to insert the cylindrical hollow portion 16 of rivet nut 11 and the interior cylindrical hollow of rivet nut 11 portion 16 agree with; In 15 whiles of crack that strut in rivet nut 11, v-depression 22 is realized self-locking with the obtuse angle incisura 18 of rivet nut 11 interior lower ends.
In the present embodiment, the length in crack 15 is to start from the point of rivet nut 11 2.5cm that extends back.
Gradation type interface enhancing hole 14 is 3 pairs, and position is to start to be followed successively by 1.5mm, 1.2mm, 0.9mm from the point of rivet nut 11.
The internal diameter of cylindrical hollow portion 16 is 1.8mm.
The diameter that self-locking struts rod 2 is 1.5mm.
Can Universal active between base 12 and rivet nut 11 be convenient to the adjustment of base 12 positions in art;
The present embodiment prepare for the not good Multifunctional bone screw of sclerotin condition, while application in operation, after the preparation of Ding road, coordinate with the base 12 of supporting spinning head 3 and male screw thread 1, the rivet nut 11Yan Ding road direction of male screw thread 1 is screwed in to the not good sclerotin of condition, after the rivet nut 11 of male screw thread 1 screws in definitely, mediation bone cement, bone cement is injected to rivet nut 11 inside through rivet nut 11 cylindrical hollow portions 16 with bone cement injector, under bone cement injector pressure-driven, bone cement flows to nail interface, road through gradation type interface enhancing hole 14, because 14 apertures, gradation type interface enhancing hole are " gradation type " feature backward from tip, the amount that bone cement flows out in different each holes, 14 apertures, interface enhancing hole is directly proportional to pore size, the discharge that is empty 14 bone cements of rivet nut 11 front end 1.5mm aperture interface enhancing is maximum, the interface enhancing point forming is maximum, the interface enhancing point forming therefrom is also reduced backward gradually by screw 11 points, thereby the effectively position in hold-down screw 1 Ding road, the swing of the point of strong control screw 1 in sclerotin, thereby reduce the incidence rate of screw loosening.Behind bone cement point-like strengthening nail road, self-locking is strutted to rod 2 and squeeze into rivet nut 11 inside by cylindrical hollow portion 16, strut screw front end and can strut crack 15, after strutting, crack 15 front ends can compacting follow closely the sclerotin at interface, road, the hold that strengthens screw and sclerotin further increases the stability of rivet nut 11, simultaneously self-locking struts in the process in crack 15 that rod 2 struts screw and realizes auto-lock function, self-locking struts the screw that can effectively avoid after excellent 2 self-lockings the crack 15 of the screw front end being caused by the sclerotin retroaction around of the metallicity He Ding of screw 1 road own to bounce back and to cause and fixes unsuccessfully.
To sum up, this utility model prepared for the not good Multifunctional bone screw of sclerotin condition, utilize novel screw " gradation type " point-like Strengthening Hole to form the overall structure of " having bone cement in nail; have nail in bone cement ", in strengthening nail road, strengthen the interaction of screw and sclerotin, increase the hold of screw, maintain the stability of screw.Meanwhile, self-locking strut rod strut screw front end can strut design after and male screw thread self-locking, in around strutting male screw thread compacting nail road, sclerotin further strengthens screw hold, be self-locking in male screw thread cylindrical hollow portion and keep compacting effect that the softened state of screw avoids following closely sclerotin around to strut portion because self metallic character Ji Ding road external force pressure retraction that sclerotin produces disappears around because of screw front end, guarantee to strut interaction energy and reach expection surgical effect.Therefore, what this utility model was prepared guarantees that from multiple angles screw is at the not fixed effect of good sclerotin of sclerotin condition for the not good Multifunctional bone screw of sclerotin condition, is a kind of effectively bone surgery device.
Claims (5)
1. one kind for the not good Multifunctional bone screw of sclerotin condition, it is characterized in that, strut rod (2) by male screw thread (1) and self-locking and form, wherein, male screw thread (1) forms entirety by rivet nut (11) and base (12), has and the supporting screw thread of spinning head (3) on base (12);
Described rivet nut (11) has external screw thread (13), in rivet nut (11), is cylindrical hollow portion (16), diminishes and is transited into the inverted frustum of a cone (17) at the caliber of cylindrical hollow portion (16) lower end, and the frustum of a cone (17) lower end is an obtuse angle incisura (18);
There is the crack (15) of cutting along rivet nut (11) longitudinal axis at the point of rivet nut (11), in crack, (15) are upper is arranged with circular gradation type interface enhancing hole (14) along external screw thread (13) pitch interval, this interface enhancing hole (14) communicates with cylindrical hollow portion (16), and the aperture in gradation type interface enhancing hole (14) is reduced backward successively by rivet nut (11) point;
It is cylinder that described self-locking struts rod (2), diameter is more smaller than rivet nut (11) inner circular column hollow bulb (16) internal diameter, the front end that self-locking struts rod (2) is taper (21), have an inside v-depression (22) at taper (21) rear portion, after self-locking struts rod (2) to insert the cylindrical hollow portion (16) of rivet nut (11) and in rivet nut (11), cylindrical hollow portion (16) agrees with; Strutting crack (15) in rivet nut (11) simultaneously, v-depression (22) is realized self-locking with the obtuse angle incisura (18) of the interior lower end of rivet nut (11).
2. as claimed in claim 1ly it is characterized in that for the not good Multifunctional bone screw of sclerotin condition, the length in described crack (15) is for to start from the point of rivet nut (11) 2.5cm that extends back.
3. as claimed in claim 1ly it is characterized in that for the not good Multifunctional bone screw of sclerotin condition, described gradation type interface enhancing hole (14) is 3 pairs, and position is for to start to be followed successively by 1.5mm, 1.2mm, 0.9mm from the point of rivet nut (11).
4. as claimed in claim 1ly it is characterized in that for the not good Multifunctional bone screw of sclerotin condition, the internal diameter of described cylindrical hollow portion (16) is 1.8mm.
5. as claimed in claim 1ly it is characterized in that for the not good Multifunctional bone screw of sclerotin condition, the diameter that described self-locking struts rod (2) is 1.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420125524.9U CN203815564U (en) | 2014-03-19 | 2014-03-19 | Multifunctional bone screw used in poor bone condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420125524.9U CN203815564U (en) | 2014-03-19 | 2014-03-19 | Multifunctional bone screw used in poor bone condition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203815564U true CN203815564U (en) | 2014-09-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420125524.9U Withdrawn - After Issue CN203815564U (en) | 2014-03-19 | 2014-03-19 | Multifunctional bone screw used in poor bone condition |
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| Country | Link |
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| CN (1) | CN203815564U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103845110A (en) * | 2014-03-19 | 2014-06-11 | 中国人民解放军第四军医大学 | Multifunctional bone screw applied to bone with poor sclerotin condition |
| CN107510522A (en) * | 2017-08-22 | 2017-12-26 | 深圳维度生物医疗科技有限公司 | A kind of hollow porous titanium femoral head support stick with gradual-change bore diameter and porosity |
| CN108784816A (en) * | 2018-08-01 | 2018-11-13 | 常州华森医疗器械有限公司 | Oval side opening hollow pedicle nail |
-
2014
- 2014-03-19 CN CN201420125524.9U patent/CN203815564U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103845110A (en) * | 2014-03-19 | 2014-06-11 | 中国人民解放军第四军医大学 | Multifunctional bone screw applied to bone with poor sclerotin condition |
| CN103845110B (en) * | 2014-03-19 | 2015-12-02 | 中国人民解放军第四军医大学 | A kind of Multifunctional bone screw not good for sclerotin condition |
| CN107510522A (en) * | 2017-08-22 | 2017-12-26 | 深圳维度生物医疗科技有限公司 | A kind of hollow porous titanium femoral head support stick with gradual-change bore diameter and porosity |
| CN108784816A (en) * | 2018-08-01 | 2018-11-13 | 常州华森医疗器械有限公司 | Oval side opening hollow pedicle nail |
| CN108784816B (en) * | 2018-08-01 | 2020-01-21 | 常州华森医疗器械有限公司 | Hollow pedicle screw with oval side hole |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140910 Effective date of abandoning: 20151202 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |