CN205126394U - Mixed double thread pedicle of vertebral arch of single multiaxis nail - Google Patents
Mixed double thread pedicle of vertebral arch of single multiaxis nail Download PDFInfo
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- CN205126394U CN205126394U CN201520796419.2U CN201520796419U CN205126394U CN 205126394 U CN205126394 U CN 205126394U CN 201520796419 U CN201520796419 U CN 201520796419U CN 205126394 U CN205126394 U CN 205126394U
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- nail
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- locking ring
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- universal
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Abstract
The utility model discloses a mixed double thread pedicle of vertebral arch of single multiaxis nail belongs to medical instrument technical field, including installing universal screw, lock loop, the clamping ring that leads to the intracavity at screw base in proper order, the head lower extreme card of universal screw is put in screw base, and the nail pole of universal screw stretches out outside screw base, lock loop and clamping ring are common presses in the head upper end of universal screw, and wherein the lower pot head of clamping ring is put and be spacing in the lock loop, and lock loop and screw base pass through threaded connection. The utility model discloses mixed double thread pedicle of vertebral arch of single multiaxis nail can realize the conversion of single multiaxis normal position, easy operation, the various change of operation internal fixation, the double thread design makes the internal fixation stronger, reduces the cutting of nail way and implants the revolution, and the operation process time is short, the safety of performing the operation.
Description
Technical field
This utility model discloses the two screw thread pedicle nail of a kind of single multiaxis mixing, belongs to technical field of medical instruments.
Background technology
Along with the physiological mechanics of people to spinal disease and the understanding of material property, the Internal fixation technology of spinal column also obtains very large progress, and the kind of the implant pedicle nail of key wherein also becomes various, and style difference is large.Pedicle nail is divided into fixing pedicle nail and the large class of Universal vertebra arch root screw two, doctor selects the kind of pedicle nail at operation process according to actual case, even sometimes need in operation process to pedicle nail fixing and universal between realize a kind of conversion, select nail process that operating time can be caused long, operation safety problem.The common pedicle nail of existing market can not realize fixing and universal between conversion.
Utility model content
The purpose of this utility model be to provide a kind of can fixing and universal between carry out the two screw thread pedicle nail of single multiaxis mixing changed.
For achieving the above object, the technical scheme that this utility model adopts is:
The two screw thread pedicle nail of a kind of single multiaxis mixing, comprises the Universal screw nail, locking ring, the pressure ring that are arranged on successively in screw base cavity;
The head lower end holding of Universal screw nail is in screw base, and the nail bar of Universal screw nail extend out to outside screw base;
Locking ring and pressure ring are pressed in the head upper end of Universal screw nail jointly, and wherein the lower end of pressure ring is nested with and spacing in locking ring, and locking ring and screw base are threaded connection.
Whether this utility model, by regulating the position of locking ring, realizes pressurizeing to Universal screw nail, reaches the object that single multiaxis changes.
As the further setting of such scheme, cavity one end of described screw base is provided with inner chamber sphere one, female thread, loose slot, interference face one from outside to inside successively;
The head upper end outer wall of Universal screw nail is small sphere of exterior rearview, lower end outer wall is large sphere, and is provided with land plateau between small sphere of exterior rearview and large sphere; The large mating spherical surfaces of head is arranged on the inner chamber sphere one of screw base;
Cavity one end of locking ring is provided with the inner chamber sphere two that to match with small sphere of exterior rearview, and this end end of locking ring is the top pressure surface relative with land plateau position; The cavity other end of locking ring is provided with interior step, and this end outer wall of locking ring is provided with interference face two, interference face two is positioned at loose slot, and this end end of locking ring is provided with concave groove, meanwhile, locking ring outer wall is threaded with the female thread of screw base by the external screw thread arranged;
Cavity one end of pressure ring is provided with the inner chamber sphere three matched with small sphere of exterior rearview, and this end outer wall of pressure ring is provided with step surface, and step surface coordinates holding in the interior step of locking ring.
Described small sphere of exterior rearview and large sphere all offer serrated slot.Serrated slot structure can increase the frictional force between Universal screw nail and pressure ring, and the frictional force between Universal screw nail and screw base.
Screw thread on described nail bar is double thread.Double thread structure makes into nail speed doublings, strengthens resisting pull out forces, reduces the cutting in nail road and implants revolution.
Screw thread epimere on described nail bar is cortical bone screw thread, and hypomere is cancellous threads.Cortical bone screw thread and cancellous threads, realize cortical bone and spongy bone exclusive fixing, make nail bar more adapt to different sclerotin.
Described concave groove is four, and is uniformly distributed.Concave groove is for coordinating Screwdriver sleeve to tighten locking ring or unclamping.Four equally distributed concave groove are arranged, and make tightening or unclamping carry out more steady of locking ring.
The two screw thread pedicle nail of this utility model list multiaxis mixing, in the process of operation, is screwed in Universal screw nail in bone by screw driver, then decides fixed cone nut nail or Universal vertebra arch root screw by the locking ring in Screwdriver sleeve locking screw nail seat.When locking ring is locked by Screwdriver sleeve, pedicle nail is fixing pedicle nail; When unclamping locking ring, pedicle nail is Universal vertebra arch root screw.Then pitman and housing pin is put into.Whole operation process realizes twice pressurization to Universal screw nail, dual fail-safe retaining mechanism, is once the pressurization of locking ring to Universal screw nail, is once the pressurization of pressure ring to Universal screw nail.
The two screw thread pedicle nail of this utility model list multiaxis mixing, also can be locked by Screwdriver sleeve in vitro and unclamp locking ring, realize the transformation of single multiaxis.
In a word, the Universal screw nail in this utility model can carry out the conversion of single multiaxis original position, and transition regime is simple, simple to operate, security and stability is good, and the operation process time is short, operation safety.Especially in backbone correcting, have special advantage, adopt staple pattern to carry out orthopedic, universal nail pattern locks, and adds motility and the convenience of operation.The two helicitic texture of nail bar of Universal screw nail makes into nail speed doublings, strengthens resisting pull out forces, provides perfect lateral bending orthopaedic function.In addition, because this utility model can realize the original position conversion of single multiaxis in operation process, therefore the quantity in stock of distributor to product can effectively be reduced.
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of screw base in this utility model;
Fig. 3 is the structural representation of locking ring in this utility model;
Fig. 4 is the plan structure schematic diagram of Fig. 3;
Fig. 5 is the structural representation of Universal screw nail in this utility model;
Fig. 6 is the structural representation of pressure ring in this utility model.
Detailed description of the invention
Shown in composition graphs 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, the two screw thread pedicle nail of this utility model list multiaxis mixing, comprises the Universal screw nail 4, locking ring 2, the pressure ring 3 that are arranged on successively in screw base 1 cavity; The head lower end holding of Universal screw nail 4 is in screw base 1, and the nail bar 21 of Universal screw nail 4 extend out to outside screw base 1; Locking ring 2 and pressure ring 3 are pressed in the head upper end of Universal screw nail 4 jointly, and wherein the lower end of pressure ring 3 is nested with and spacing in locking ring 2, and locking ring 2 and screw base 1 are threaded connection.
In the present embodiment, cavity one end of screw base 1 is provided with inner chamber sphere 1, female thread 6, loose slot 7, interference face 1 from outside to inside successively;
The head upper end outer wall of Universal screw nail 4 is small sphere of exterior rearview 15, lower end outer wall is large sphere 17, and is provided with land plateau 16 between small sphere of exterior rearview 15 and large sphere 17; The large sphere 17 of head is equipped with on the inner chamber sphere 1 of screw base 1;
Cavity one end of locking ring 2 is provided with the inner chamber sphere 2 11 matched with small sphere of exterior rearview 15, and this end end of locking ring 2 is the top pressure surface 12 relative with land plateau 16 position; The cavity other end of locking ring 2 is provided with interior step 9, and this end outer wall of locking ring 2 is provided with interference face 2 13, interference face 2 13 is positioned at loose slot 7 (interference face 2 13 can be movable at loose slot 7), this end end of locking ring 2 is provided with concave groove 14, meanwhile, locking ring 2 outer wall is threaded with the female thread 6 of screw base 1 by the external screw thread 10 arranged;
Cavity one end of pressure ring 3 is provided with the inner chamber sphere 3 19 matched with small sphere of exterior rearview 15, and this end outer wall of pressure ring 3 is provided with step surface 18, and step surface 18 coordinates holding in the interior step 9 of locking ring 2.
For improving performance further, this utility model all offers serrated slot 22 on small sphere of exterior rearview 15 and large sphere 17.
Screw thread on this utility model nail bar 21 is double thread.As further preferred, the screw thread epimere on nail bar 21 is cortical bone screw thread, and hypomere is cancellous threads.
In the present embodiment, concave groove 14 is four, and is uniformly distributed.
Assembling process of the present utility model is as follows:
First Universal screw nail 4 is put into screw base 1, the large sphere 17 of Universal screw nail 4 is coordinated with the inner chamber sphere 1 of screw base 1, the nail bar 21 of Universal screw nail 4 extend out to outside screw base 1 by screw bore, above the small sphere of exterior rearview 15 again the inner chamber sphere 3 19 of pressure ring 3 being placed on Universal screw nail 4, then locking ring 2 is put into screw base 1, the interference face 1 of screw base 1 is clamp-oned by interference face 2 13, and enter loose slot 7, be threaded with the female thread 6 of screw base 1 with the external screw thread 10 of locking ring 2 afterwards, the top pressure surface 12 of locking ring 2 is allowed to contact with the land plateau 16 of Universal screw nail 4, the inner chamber sphere 2 11 of locking ring 2 matches with the small sphere of exterior rearview 15 of Universal screw nail 4, locking ring 2 can in the loose slot 7 of screw base 1 movable (namely loose slot 7 provides adjustable activity space for locking ring 2), and the step surface 18 phase holding of the interior step 9 of locking ring 2 and pressure ring 3, make pressure ring 3 in locking ring 2 times activities and allow pressure ring pressure surface 20 extend out to outside locking ring 2.The concave groove 14 of last locking ring 2 coordinates Screwdriver sleeve to change the locking state of locking ring 2.
Above-described embodiment only illustrates inventive concept of the present utility model for explaining, but not the restriction to this utility model rights protection, all changes utilizing this design this utility model to be carried out to unsubstantiality, all should fall into protection domain of the present utility model.
Claims (6)
1. the two screw thread pedicle nail of single multiaxis mixing, is characterized in that: comprise the Universal screw nail, locking ring, the pressure ring that are arranged on successively in screw base cavity;
The head lower end holding of Universal screw nail is in screw base, and the nail bar of Universal screw nail extend out to outside screw base;
Locking ring and pressure ring are pressed in the head upper end of Universal screw nail jointly, and wherein the lower end of pressure ring is nested with and spacing in locking ring, and locking ring and screw base are threaded connection.
2. the two screw thread pedicle nail of single multiaxis mixing as claimed in claim 1, is characterized in that: cavity one end of described screw base is provided with inner chamber sphere one, female thread, loose slot, interference face one from outside to inside successively;
The head upper end outer wall of Universal screw nail is small sphere of exterior rearview, lower end outer wall is large sphere, and is provided with land plateau between small sphere of exterior rearview and large sphere; The large mating spherical surfaces of head is arranged on the inner chamber sphere one of screw base;
Cavity one end of locking ring is provided with the inner chamber sphere two that to match with small sphere of exterior rearview, and this end end of locking ring is the top pressure surface relative with land plateau position; The cavity other end of locking ring is provided with interior step, and this end outer wall of locking ring is provided with interference face two, interference face two is positioned at loose slot, and this end end of locking ring is provided with concave groove, meanwhile, locking ring outer wall is threaded with the female thread of screw base by the external screw thread arranged;
Cavity one end of pressure ring is provided with the inner chamber sphere three matched with small sphere of exterior rearview, and this end outer wall of pressure ring is provided with step surface, and step surface coordinates holding in the interior step of locking ring.
3. the two screw thread pedicle nail of single multiaxis mixing as claimed in claim 2, is characterized in that: described small sphere of exterior rearview and large sphere all offer serrated slot.
4. the two screw thread pedicle nail of single multiaxis mixing as described in claim 1 or 2 or 3, is characterized in that: the screw thread on described nail bar is double thread.
5. the two screw thread pedicle nail of single multiaxis mixing as claimed in claim 4, it is characterized in that: the screw thread epimere on described nail bar is cortical bone screw thread, hypomere is cancellous threads.
6. the two screw thread pedicle nail of single multiaxis mixing as claimed in claim 2, is characterized in that: described concave groove is four, and is uniformly distributed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520796419.2U CN205126394U (en) | 2015-10-15 | 2015-10-15 | Mixed double thread pedicle of vertebral arch of single multiaxis nail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520796419.2U CN205126394U (en) | 2015-10-15 | 2015-10-15 | Mixed double thread pedicle of vertebral arch of single multiaxis nail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205126394U true CN205126394U (en) | 2016-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520796419.2U Active CN205126394U (en) | 2015-10-15 | 2015-10-15 | Mixed double thread pedicle of vertebral arch of single multiaxis nail |
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| CN (1) | CN205126394U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105213016A (en) * | 2015-10-15 | 2016-01-06 | 浙江嘉佑医疗器械有限公司 | The two screw thread pedicle nail of single multiaxis mixing |
| CN106166084A (en) * | 2016-06-29 | 2016-11-30 | 江苏艾迪尔医疗科技股份有限公司 | Spine nail rod hook device |
-
2015
- 2015-10-15 CN CN201520796419.2U patent/CN205126394U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105213016A (en) * | 2015-10-15 | 2016-01-06 | 浙江嘉佑医疗器械有限公司 | The two screw thread pedicle nail of single multiaxis mixing |
| CN106166084A (en) * | 2016-06-29 | 2016-11-30 | 江苏艾迪尔医疗科技股份有限公司 | Spine nail rod hook device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |