CN105769314A - Detachable pedicle screw - Google Patents
Detachable pedicle screw Download PDFInfo
- Publication number
- CN105769314A CN105769314A CN201610178722.5A CN201610178722A CN105769314A CN 105769314 A CN105769314 A CN 105769314A CN 201610178722 A CN201610178722 A CN 201610178722A CN 105769314 A CN105769314 A CN 105769314A
- Authority
- CN
- China
- Prior art keywords
- screw
- rivet nut
- nail tail
- screw rivet
- blind hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/683—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin comprising bone transfixation elements, e.g. bolt with a distal cooperating element such as a nut
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/685—Elements to be fitted on the end of screws or wires, e.g. protective caps
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7062—Devices acting on, attached to, or simulating the effect of, vertebral processes, vertebral facets or ribs ; Tools for such devices
- A61B17/7064—Devices acting on, attached to, or simulating the effect of, vertebral facets; Tools therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7074—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8625—Shanks, i.e. parts contacting bone tissue
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8625—Shanks, i.e. parts contacting bone tissue
- A61B17/8635—Tips of screws
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B2017/564—Methods for bone or joint treatment
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Neurology (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
The invention discloses a detachable pedicle screw. A screw body and a screw tail adopt a split type structure, micro holes are evenly formed in the screw body and the front end of the screw tail, and the axes of the micro holes are perpendicular to that of the screw body. The pedicle screw adopts the split type structure, namely, a spinning structure, a clamping structure, an insertion structure and the like, the screw body and the screw tail are made of magnesium alloys having advantages of degradability, biocompatibility and the like, meanwhile, the micro holes perpendicular to the axis of the screw body are formed in the screw body and the front end of the screw tail, so that bone trabeculae can be distributed along the micro holes, synchronous reconstruction of the bone trabeculae is allowed during fracture healing, the continuity of the bone trabeculae in vertebrae is recovered, dual healing of fracture cortex and spongiosa is realized, the structure and mechanical conduction features are effectively recovered, the internal fixation complication incidence can be significantly reduced, the fracture treatment effect can be improved, peripheral soft tissue and blood circulation can be effectively protected, the internal fixator related complication occurrence risk is reduced, and pain and economic burden caused by secondary major surgery on patients are avoided.
Description
Technical field
The present invention relates to pedicle screw.
Background technology
Pedicle of vertebral arch is part the strongest on vertebra, is useful effect point spinal column being operated and braking in vertebral fracture is performed the operation.Pedicle instrument while obtaining effective fixing, can maintain the normal anatomy of spinal column, the motion segment of preservation spinal to greatest extent.Different segment at same apparatus, it is possible to carry out retracting, compressing, rotate, recover the forwardly and rearwardly translation of lordosis and vertebral body respectively.Include effect in rotary moveable in the abnormal movement controlling all directions obvious, and owing to pedicle instrument all has good Stabilization and the versatility of himself for three posts, the effect in maintenance and reconstruction lumbar vertebra physiology lordosis is also very reliable.There is important trabecular bone structure in the skeleton spongy bone such as long bone of limbs two ends, vertebra, calcaneus, maintenance skeleton normal morphology and mechanotransduction are played a crucial role.But implant inside-fixture after fracture and can destroy trabecular bone structure further, the existence of inside-fixture can hinder bone trabecula to rebuild in fracture healing process, can not there be efficient recovery skeleton local normal configuration and mechanotransduction performance, may result in stress raisers, cause inside-fixture to loosen, exit, rupture, nonunion, the complication such as inside-fixture surrounding fracture.Meanwhile, inside-fixture must also be taken out by second operation after union of fracture, not only add patient suffering, also increase the financial burden of patient simultaneously.
Summary of the invention
For prior art Problems existing, the present invention provides a kind of detachable pedicle screw, with the drawback overcoming prior art to exist.
For realizing the object of the invention, this detachable pedicle screw includes screw rivet nut and the nail tail of screw rivet nut end, it is characterized in that between described screw rivet nut and nail tail as split-type structural, described screw rivet nut and nail tail front end uniformly offer micropore, micropore size is 1～50um, and described micropore axis is vertical with screw rivet nut axis.
Described screw rivet nut and nail tail front end uniformly offer bar hole, and described bar hole axis is vertical with screw rivet nut axis.
Described screw rivet nut end axle center place offers screw, spins between nail tail and screw rivet nut.
Described screw rivet nut end axle center place offers regular hexagon groove, and screw rivet nut end axle center place offers screw, spins between nail tail and screw rivet nut.
Described screw rivet nut end offers blind hole, is provided with draw-in groove, clamping between nail tail and described draw-in groove in blind hole.
Described screw rivet nut end offers cross blind hole, grafting between nail tail and described cross blind hole.
Described screw rivet nut end offers blind hole, and blind hole hole wall is provided with draw-in groove, and blind hole top is equipped with stage clip and bearing pin, bearing pin upper end and stage clip forceful contact, bearing pin bottom and nail tail forceful contact, clamping between nail tail and draw-in groove successively.
The technological progress that the present invention obtains:
nullOwing to taking split-type structural namely to spin、Clamping or the isostructural pedicle screw of grafting，And screw rivet nut and nail tail have employed the close with human body bone density and elastic modelling quantity of high specific strength and specific stiffness、And there is the magnesium alloy material of the advantage such as biodegradability and biocompatibility，Simultaneously because in screw rivet nut and nail tail front end offers the micropore with screw rivet nut axis perpendicular or bar hole，Make bone trabecula can be distributed along this micropore or bar hole traveling，During permission union of fracture, bone trabecula synchronizes to rebuild，Recover bone trabecular seriality in vertebral body，Realize fracture cortex and the dual healing of spongiosa，Thus having its structure of efficient recovery and mechanotransduction feature，Interior fixing complication rate can be significantly reduced、Improve fractures effect，Can effectively protect surrounding soft tissue and blood fortune，This according to bionical interior fixing theory，Especially the bionical pedicle screw of spongy bone anatomical features in it，The hold to pedicle screw and inside-fixture can be strengthened，Again it can be avoided that inside-fixture stress is concentrated，Reduce inside-fixture related complication occurrence risk，Only need after patients with fractures's healing to take out nail tail，Avoid misery and financial burden that secondary major operation brings to patient，This fracture of the present invention bionical inside-fixture structure is the development to fractures BO (biology solid BiologicalOsteosynthesis) theory and perfect，There is high clinical treatment be worth.
Accompanying drawing explanation
Fig. 1 is existing vertebral pedicle bolt structure schematic diagram.
Fig. 2 is present configuration schematic diagram.
Fig. 3 is screw rivet nut surface microporous structure schematic diagram in Fig. 2.
Fig. 4 is screw rivet nut surface bar shaped pore structure schematic diagram in Fig. 2.
Fig. 5 is the second implementation structural representation of the present invention.
Fig. 6 is that the A-A of Fig. 5 is to sectional structure schematic diagram.
Fig. 7 is interface arrangment schematic diagram between rivet nut and nail tail.
Fig. 8 is connected structure schematic diagram between rivet nut and nail tail.
Fig. 9 is that the B-B of Fig. 8 is to sectional structure schematic diagram.
Figure 10 is the second interface arrangment schematic diagram between rivet nut and nail tail.
Detailed description of the invention
Embodiment 1: the present invention is the improvement to existing integral type pedicle screw, existing vertebral pedicle bolt structure is as shown in Figure 1, its structure is the integral structure of the nail tail 1 of screw rivet nut 2 and screw rivet nut 2 end, this detachable screw rivet nut after improvement and be split-type structural between nail tail, such as Fig. 2, shown in Fig. 3, screw is offered at screw rivet nut 4 end axle center place, spin between the screw rod of the front end protrusion of nail tail 3 and screw rivet nut 4, screw rivet nut 4 uniformly offers micropore 5 with nail tail front end, micropore 5 aperture is 1～50um, the axis perpendicular of micropore 5 axis and screw rivet nut 4.After the pedicle screw of the present embodiment structure is screwed in pedicle of vertebral arch, make that the axis of the micropore 5 in rivet nut 4 is bone trabecular with in vertebral body moves towards identical, make that the axis of the micropore 5 that nail tail 3 front end offers is bone trabecular with in vertebral body moves towards identical simultaneously, so that bone trabecula can be distributed along this micropore 5 traveling, during permission union of fracture, bone trabecula synchronizes to rebuild, and recovers bone trabecular seriality in vertebral body.After patients with fractures recovers, the screw rod that screw rivet nut 2 and nail tail 3 front end are protruded is being degraded in the patient, and nail tail 3 can be disassembled easily.
Embodiment 2: as shown in Figure 4, the present embodiment difference from Example 1 is that screw rivet nut 4 uniformly offers bar hole 6 with nail tail front end, and the axis of described bar hole 6 is vertical with screw rivet nut axis.After the pedicle screw of the present embodiment structure is screwed in pedicle of vertebral arch, make bone trabecular in the axis of bar hole 6 and vertebral body in rivet nut 4 to move towards identical, make that bar hole 6 axis that nail tail 3 front end offers is bone trabecular with in vertebral body moves towards identical, in order to bone trabecula can be distributed along this bar hole 6 traveling simultaneously.
Embodiment 3: as shown in Figure 5, Figure 6, the present embodiment difference from Example 1 is to offer a regular hexagon groove 7 at the end axle center place of screw rivet nut 4, and the end axle center place of screw rivet nut 4 offers screw, spins between nail tail 3 and screw rivet nut 4.With outer hexagonal spanner the screw rivet nut 4 of the present embodiment structure screwed in pedicle of vertebral arch and adjust the axis of micropore 5 (or bar hole 6) on its surface with in vertebral body bone trabecular move towards identical after, screw in nail tail 3, and make the axis of micropore 5 (or bar hole 6) that nail tail 3 front end offers with in vertebral body bone trabecular move towards identical after, namely complete the inserting of pedicle screw of the present embodiment structure.
Clamping between embodiment 4: as it is shown in fig. 7, the present embodiment difference from Example 1 is to offer blind hole at the end of screw rivet nut 4, blind hole medial wall is notch, card falcon 8 that nail tail 3 front end is protruded and draw-in groove.
Embodiment 5: as shown in Figure 8, Figure 9, the present embodiment difference from Example 1 is to offer cross blind hole 10 at the end of screw rivet nut 4, grafting between the cross falcon of nail tail 3 front end protrusion and the cross blind hole of screw rivet nut 4 end, penetrating pin in the pin hole 9 offered in screw rivet nut 4 can depart from screw rivet nut 4 by anti-non-magnetic shim tail 3.
Embodiment 6: as shown in Figure 10, the present embodiment difference from Example 1 is to offer a blind hole at the end axle center place of screw rivet nut 4, blind hole medial wall is notch, blind hole top assembles stage clip 11 and bearing pin 12 successively, forceful contact between the upper end of bearing pin 12 and stage clip 11, forceful contact between the bottom of bearing pin 12 and nail tail 3, clamping between the card falcon 13 of nail tail 3 and front end protrusion and draw-in groove.When disassembling nail tail 3, there is constraint between displacement disengaging and draw-in groove in opposite directions in the two card falcons 13 promoting bearing pin 12, nail tail 3 front end to protrude by following closely the duct 14 on tail 3, thus being disassembled by nail tail 3.
Claims (7)
1. a detachable pedicle screw, it includes screw rivet nut and the nail tail of screw rivet nut end, it is characterized in that between described screw rivet nut and nail tail as split-type structural, described screw rivet nut and nail tail front end uniformly offer micropore, micropore size is 1～50um, and described micropore axis is vertical with screw rivet nut axis.
2. detachable pedicle screw according to claim 1, it is characterised in that described screw rivet nut and nail tail front end uniformly offer bar hole, and described bar hole axis is vertical with screw rivet nut axis.
3. detachable pedicle screw according to claim 1, it is characterised in that described screw rivet nut end axle center place offers screw, spins between nail tail and screw rivet nut.
4. detachable pedicle screw according to claim 1, it is characterised in that described screw rivet nut end axle center place offers regular hexagon groove, screw rivet nut end axle center place offers screw, spins between nail tail and screw rivet nut.
5. detachable pedicle screw according to claim 1, it is characterised in that described screw rivet nut end offers blind hole, is provided with draw-in groove, clamping between nail tail and described draw-in groove in blind hole.
6. detachable pedicle screw according to claim 1, it is characterised in that described screw rivet nut end offers cross blind hole, grafting between nail tail and described cross blind hole.
7. detachable pedicle screw according to claim 1, it is characterized in that described screw rivet nut end offers blind hole, blind hole hole wall is provided with draw-in groove, blind hole top is equipped with stage clip and bearing pin successively, bearing pin upper end and stage clip forceful contact, bearing pin bottom and nail tail forceful contact, clamping between nail tail and draw-in groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610178722.5A CN105769314A (en) | 2016-03-27 | 2016-03-27 | Detachable pedicle screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610178722.5A CN105769314A (en) | 2016-03-27 | 2016-03-27 | Detachable pedicle screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105769314A true CN105769314A (en) | 2016-07-20 |
Family
ID=56392033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610178722.5A Pending CN105769314A (en) | 2016-03-27 | 2016-03-27 | Detachable pedicle screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105769314A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108857272A (en) * | 2018-06-06 | 2018-11-23 | 哈尔滨汽轮机厂有限责任公司 | A kind of lathe receiving device hard alloy head screw and its processing method |
| CN111407387A (en) * | 2020-03-10 | 2020-07-14 | 昶盛(物料应用制品)有限公司 | Screw assembly for bone fixation and bone fixation device |
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| WO2004017846A1 (en) * | 2002-08-16 | 2004-03-04 | Waldemar Link Gmbh & Co. Kg | Prosthesis or surgical instrument equipped with a fixing screw |
| CN101023881A (en) * | 2006-02-23 | 2007-08-29 | 比德曼莫泰赫有限公司 | Bone anchoring device |
| US20130131733A1 (en) * | 2011-11-17 | 2013-05-23 | Metal Industries Research&Development Centre | Bone screw, method for manufacturing the bone screw, and tool for mounting and removing the bone screw |
| CN103126759A (en) * | 2012-12-08 | 2013-06-05 | 宁波市鄞州云帆工程咨询有限公司 | Push rod disassembling double-way self-locking bone screw |
| CN103536348A (en) * | 2012-07-10 | 2014-01-29 | 北京爱康宜诚医疗器材股份有限公司 | Integration anchoring bone nail |
| CN104586496A (en) * | 2015-02-09 | 2015-05-06 | 张英泽 | Microporous bionic fracture fixing device capable of promoting fracture healing |
| CN204337069U (en) * | 2014-12-22 | 2015-05-20 | 广州市健齿生物科技有限公司 | A kind of tooth implant of composite construction |
| CN104856775A (en) * | 2015-05-26 | 2015-08-26 | 北京爱康宜诚医疗器材股份有限公司 | Implant, false tooth comprising implant, and implant wrench matched with implant |
| CN205548658U (en) * | 2016-03-27 | 2016-09-07 | 陈伟 | Detachable pedicle of vertebral arch screw |
-
2016
- 2016-03-27 CN CN201610178722.5A patent/CN105769314A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004017846A1 (en) * | 2002-08-16 | 2004-03-04 | Waldemar Link Gmbh & Co. Kg | Prosthesis or surgical instrument equipped with a fixing screw |
| CN101023881A (en) * | 2006-02-23 | 2007-08-29 | 比德曼莫泰赫有限公司 | Bone anchoring device |
| US20130131733A1 (en) * | 2011-11-17 | 2013-05-23 | Metal Industries Research&Development Centre | Bone screw, method for manufacturing the bone screw, and tool for mounting and removing the bone screw |
| CN103536348A (en) * | 2012-07-10 | 2014-01-29 | 北京爱康宜诚医疗器材股份有限公司 | Integration anchoring bone nail |
| CN103126759A (en) * | 2012-12-08 | 2013-06-05 | 宁波市鄞州云帆工程咨询有限公司 | Push rod disassembling double-way self-locking bone screw |
| CN204337069U (en) * | 2014-12-22 | 2015-05-20 | 广州市健齿生物科技有限公司 | A kind of tooth implant of composite construction |
| CN104586496A (en) * | 2015-02-09 | 2015-05-06 | 张英泽 | Microporous bionic fracture fixing device capable of promoting fracture healing |
| CN104856775A (en) * | 2015-05-26 | 2015-08-26 | 北京爱康宜诚医疗器材股份有限公司 | Implant, false tooth comprising implant, and implant wrench matched with implant |
| CN205548658U (en) * | 2016-03-27 | 2016-09-07 | 陈伟 | Detachable pedicle of vertebral arch screw |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108857272A (en) * | 2018-06-06 | 2018-11-23 | 哈尔滨汽轮机厂有限责任公司 | A kind of lathe receiving device hard alloy head screw and its processing method |
| CN111407387A (en) * | 2020-03-10 | 2020-07-14 | 昶盛(物料应用制品)有限公司 | Screw assembly for bone fixation and bone fixation device |
| WO2021180076A1 (en) * | 2020-03-10 | 2021-09-16 | 昶盛(物料应用制品)有限公司 | Screw assembly for bone fixation, and bone fixation device |
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Application publication date: 20160720 |
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