CN104887300A - Split lengthening pedicle screw - Google Patents
Split lengthening pedicle screw Download PDFInfo
- Publication number
- CN104887300A CN104887300A CN201510270832.XA CN201510270832A CN104887300A CN 104887300 A CN104887300 A CN 104887300A CN 201510270832 A CN201510270832 A CN 201510270832A CN 104887300 A CN104887300 A CN 104887300A
- Authority
- CN
- China
- Prior art keywords
- screw
- pedicle
- connecting rod
- head end
- tail end
- 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
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7071—Implants for expanding or repairing the vertebral arch or wedged between laminae or pedicles; 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
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/864—Pins or screws or threaded wires; nuts therefor hollow, e.g. with socket or cannulated
-
- 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
Abstract
The invention relates to a split lengthening pedicle screw suitable for operations of a lumbar spinal stenosis patient. The split lengthening pedicle screw is composed of three parts including a screw head end, an internal connecting rod and a screw tail end, and the screw head end and the head side of the internal connecting rod are each provided with internal hexagonal tool screwing grooves; self-tapping threads are arranged on the outer wall of the screw head end and the outer wall of the screw tail end, a thread-free area is arranged in the middle of the internal connecting rod, thread areas are arranged at the two ends of the internal connecting rod, and the thread areas are meshed with threads on the inner walls of the screw head end and the screw tail end; hollow holes are formed in the screw head end, the internal connecting rod and the screw tail end, and corresponding guide needles can pass through the hollow holes. The split lengthening pedicle screw is applied to the operations of the clinic lumbar spinal stenosis patient, after the vertebral pedicle is cut off, the complete split lengthening pedicle screw is arranged in the vertebral pedicle, the internal connecting rod is rotated, while the screw is lengthened, the distance between breaking sections of the vertebral pedicle is driven to be increased, and the aims of lengthening the vertebral pedicle and expanding the cross sectional area of the neural canal and the hole diameter of the foramen intervertebrale are achieved. The split lengthening pedicle screw has the advantages of being simple in structure, convenient to operate, small in wound and the like.
Description
Technical field
The present invention relates to a kind of point body extension pedicle screw being applicable to patients with lumbar spinal stenosis operation and using, belong to spinal surgery medical apparatus and instruments field of surgery.
Background technology
Lumbar spinal stenosis refers to that a variety of causes causes bone-ligament vertebral canal volume to reduce, and causes lumbar vertebra nerve and angiokinesis space to be reduced, thus the clinical syndrome being main manifestations with lumbago and skelalgia, intermittent claudication caused.Along with the acceleration of aged tendency of population process, the sickness rate moving back lumbar spinal stenosis is more and more higher, and the patient populations undergone surgery also increases year by year.
The traditional standard procedures of lumbar spinal stenosis is Laminectomy.Operation will excise spinous process, vertebral plate, ligamenta flava and part facet joint, add simultaneously and do pedicle internal fixators and intervertebral fusion, to reach the object of extensively decompression.The failure of operation is because vertebrae plate resection and the prominent excision of partial joint widely, damage posterior spinal posterior muscular ligament complex structure, pedicle screw systems changes the normal biological line of force of spinal column rear pillar of knowing clearly, the iatrogenic lumbar instability of postoperative easy appearance and Lumbar Vertebral Canal restenosis, and easily occur that Adjacent segment degeneration accelerates, cause long-term effect not good.It is long to there is operating time in this type of operation simultaneously, the problems such as wound is large, and hemorrhage many, expense is expensive, and post-operative recovery time is long.
Although Laminectomy remains the most basic art formula, due to its defect and deficiency, so the modus operandi of new Wicresoft enters into the sight line of people just gradually.Operation at present for lumbar spinal stenosis Wicresoft has mainly contained percutaneous cervical arc root internal fixation by nail-stick system art, processus spinosus prop-open device coflex implantation, pedicle of vertebral arch lengthening etc.But these apparatus structures are complicated, operating difficulties, wound is large, and the hemorrhage shortcoming such as many, fit closely apparatus have not been reported.
Summary of the invention
Goal of the invention:
The present invention's one point body extension pedicle screw, its object is to provide a kind of structure simple, easy to operate, wound is little, goes out insufficiency of blood, is applicable to the medical apparatus and instruments of operative treatment lumbar spinal stenosis.
Technical scheme of the present invention is as follows:
A kind of point body extension pedicle screw, is characterized in that: this screw is primarily of screw head end, inner connecting rod and screw tail end three part composition, and the head side of screw head end and inner connecting rod is equipped with interior hex tool and tightens groove; Screw head end and screw tail end outer wall are provided with tapping screw thread, and for being threaded area without threaded area, two ends in the middle part of inner connecting rod, its threaded area is meshed with the inner thread of screw head end and screw tail end; Screw head end, inner connecting rod and screw tail end have hollow hole, and the guide pin adapted can be made to pass through.
And screw head end is cortical bone screw thread, screw tail end is cancellous threads.
Respectively there is part the tail side of screw head end and the head side of screw tail end without threaded area, have draw-in groove to be mutually engaged simultaneously.
Between screw head end inwall and middle brace rod head side, be provided with jackscrew one piece.
Vertebral arch pedicle extension device of the present invention compared with prior art has following beneficial effect:
1, the present invention includes screw head end, inner connecting rod, and screw tail end only three part compositions, parts are few, and structure is simple, low cost of manufacture, has good promotion prospect;
2, the inserting of minimal invasion in use procedure of the present invention, does not destroy spinal posterior muscle ligament complex structure, little on spinal stability impact;
3, the present invention is relative to conventional pedicle screws without the need to holding excellent groove, and incisura is low, if headless screw, is then zero incisura.
4, the present invention is simple to operate, and therefore operating time is short.
5, the distance between the pedicle of vertebral arch section of breaking increases by worm drive, only needs rotating inner part connecting rod to reach, easy to operate.
6, extending distance can accurate Calculation by rotating cycle.
Accompanying drawing explanation
Fig. 1 is the structural representation of invention point body extension pedicle screw;
Fig. 2 is a point body extension pedicle screw top view;
Fig. 3 is the schematic diagram before pedicle screw of the present invention extends, and namely divides body extension pedicle screw to be combined into the schematic diagram of complete screw;
Fig. 4 is the schematic diagram after pedicle screw of the present invention extends, schematic diagram after namely implanting;
Fig. 5 is prolongation pedicle screw profile of the present invention;
Fig. 6 is that pedicle screw of the present invention inserts schematic diagram (before prolongation) after vertebral body;
Fig. 7 is schematic diagram after pedicle screw of the present invention inserts vertebral body (extending rear).
Detailed description of the invention
Describe the present invention below in conjunction with drawings and Examples:
A kind of point body extension pedicle screw, shown in accompanying drawing 1-Fig. 7, is characterized in that: this screw comprises screw head end 1, inner connecting rod 2, screw tail end 3 three parts, and three incorporating aspects become the complete pedicle screw of one piece of screw thread coupling.The head side of screw head end 1 and inner connecting rod 2 is equipped with interior hex tool and tightens groove.Screw head end 1 and screw tail end 3 outer wall are provided with tapping screw thread, and screw head end 1 is cortical bone screw thread, and screw tail end 3 is cancellous threads.For being threaded area without threaded area, two ends in the middle part of inner connecting rod 2, its threaded area is meshed with the inner thread of screw head end 1 and screw tail end 3.Divide body extension pedicle screw to have hollow hole, the guide pin adapted can be made to pass through.Screw head end 1 and screw tail end 3 are formed in one, and respectively there is part the tail side of screw head end 1 and the head side of screw tail end 3 without threaded area, have draw-in groove to be mutually engaged simultaneously.
Conventional percutaneous is put after nail method will divide body extension pedicle screw to insert from lumbar vertebra crista lambdoidalis, screw tail end 3 will be anchored in vertebral body, rivet is followed closely in pedicle of vertebral arch by screw head end 1, the inner external screw thread at connecting rod 2 two ends and the endothelium screw thread of screw head end 1 and screw tail end 3 match, and formation is threaded.By instrument rotating inner part connecting rod 2, be separated screw two ends end to end.
Further technical scheme, hold excellent groove due to what follow closely without the need to conventional vertebral pedicle, it is very low that incisura can do, and even can make headless screw, completely without incisura.
Further technical scheme, by fatigue test, contrasts the different inner thread trapezoidal thread of screw and saw-tooth thread, chooses the most suitable coefficient of friction major thread, reduce the possibility loosened.
Further technical scheme, at screw head end 1 inwall, middle brace rod 2 sides, increase jackscrew one piece, then in rotating, connecting rod tightens jackscrew after obtaining satisfied prolongation distance, anti-loosening in advance.
Design and the operation principle of of the present invention point of body extension pedicle screw are:
Utilize the principle design of mechanically worm drive.So-called worm drive screw by spiral and screw thread facing the machine driving realizing gyration and rectilinear motion and change.For converting rotary motion to rectilinear motion, the torque axis of spiral is changed to horizontal thrust.In the present invention, the screw thread at inner connecting rod 2 two ends is incorgruous screw thread, screw head end 1 and screw tail end 2 match inner thread for screw thread in the same way, after a point body extension pedicle screw is inserted the pedicle of vertebral arch of blocking, disconnected section is positioned at point body extension pedicle screw stage casing without screw thread draw-in groove part, screw tail end 3 and vertebral cancellous bone are fixed, screw head end and pedicle of vertebral arch inwall are fixed, become as a whole, now rotating inner part connecting rod, screw head end cephalad moves, reach prolongation pedicle of vertebral arch, expand the object of canalis spinalis cross-sectional area.
Three incorporating aspects of the present invention become the complete pedicle screw of one piece of screw thread coupling, have logical mesopore in the middle part of it, and to make guide pin pass through, its nail tail end external screw thread is tapping screw thread.Apply the present invention in the operation of clinical patients with lumbar spinal stenosis, after pedicle of vertebral arch is blocked, conventional percutaneous is put after nail method will divide body extension pedicle screw to insert from lumbar vertebra crista lambdoidalis, screw tail end will be anchored in vertebral body, screw head end by rivet in pedicle of vertebral arch, the inner external screw thread at connecting rod two ends and the endothelium screw thread of screw head end and screw tail end match, and formation is threaded.By instrument rotating inner part connecting rod, be separated screw two ends end to end, while screw extends, drive the increase of the spacing of the pedicle of vertebral arch section of breaking, reach and artificially extend pedicle of vertebral arch, expand the object in canalis spinalis cross-sectional area and intervertebral foramina aperture.
Using method of the present invention: 1. first at body surface C-arm x-ray location pedicle of vertebral arch mid point, determine entry point; 2. insert guide pin, C-arm is located again; 3. along guide pin, the required service aisle of foundation operation expanded step by step; 4. conventional percutaneous is put nail method and is made nail road in projection place of herringbone sour jujube pedicle of vertebral arch; 5. set up operation path needed for foramen intervertebrale lens, intervertebral spinal fusion mirror passage band ultrasound knife bilateral pedicle of vertebral arch is blocked; 6. rotating inner part connecting rod, while screw extends, drives the increase of the spacing of the pedicle of vertebral arch section of breaking, reaches and artificially extend pedicle of vertebral arch, expand the object in canalis spinalis cross-sectional area and intervertebral foramina aperture.7. determine to extend distance by rotating cycle, tighten jackscrew.
Divide body extension pedicle screw while screw extends, drive the increase of the spacing of the pedicle of vertebral arch section of breaking, reach and artificially extend pedicle of vertebral arch, expand canalis spinalis cross-sectional area and intervertebral foramina aperture, remove the object that nerve compression improves clinical symptoms.Operation can be made simultaneously Wicresoft's degree increases more, spinal posterior tissue injury is little, go out insufficiency of blood, operating time and hospital stays short, the advantage such as post-operative recovery time is short; Be used for the treatment of lumbar spinal stenosis prospect extensive.
Claims (4)
1. one kind of point of body extension pedicle screw, it is characterized in that: this screw is primarily of screw head end (1), inner connecting rod (2) and screw tail end (3) three part composition, and the head side of screw head end (1) and inner connecting rod (2) is equipped with interior hex tool and tightens groove; Screw head end (1) and screw tail end (3) outer wall are provided with tapping screw thread, and inner connecting rod (2) middle part is for being threaded area without threaded area, two ends, and its threaded area is meshed with the inner thread of screw head end (1) and screw tail end (3); Screw head end (1), inner connecting rod (2) and screw tail end (3) have hollow hole, and the guide pin adapted can be made to pass through.
2. according to claim 1 point of body extension pedicle screw, is characterized in that: and screw head end (1) is cortical bone screw thread, and screw tail end (3) is cancellous threads.
3. according to claim 1 point of body extension pedicle screw, is characterized in that: respectively there is part the tail side of screw head end (1) and the head side of screw tail end (3) without threaded area, have draw-in groove to be mutually engaged simultaneously.
4. according to claim 1 point of body extension pedicle screw, is characterized in that: between screw head end (1) inwall and middle brace rod (2) head side, is provided with jackscrew one piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510270832.XA CN104887300A (en) | 2015-05-26 | 2015-05-26 | Split lengthening pedicle screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510270832.XA CN104887300A (en) | 2015-05-26 | 2015-05-26 | Split lengthening pedicle screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104887300A true CN104887300A (en) | 2015-09-09 |
Family
ID=54020569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510270832.XA Pending CN104887300A (en) | 2015-05-26 | 2015-05-26 | Split lengthening pedicle screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104887300A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106580415A (en) * | 2017-01-19 | 2017-04-26 | 张衣北 | Low-profile bidirectional locking large-angle universal pedicle screw |
| CN107307899A (en) * | 2016-12-31 | 2017-11-03 | 王文军 | Multi-segmental tandem spinal external fixator |
| CN108498155A (en) * | 2018-04-26 | 2018-09-07 | 重庆医科大学附属永川医院 | A kind of anti-rotation pedicle screw of self-locking and its application method |
| CN109316231A (en) * | 2018-12-03 | 2019-02-12 | 重庆医科大学附属第二医院 | Percutaneous posterior cervical single open-door internal fixation system |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994014385A1 (en) * | 1992-12-22 | 1994-07-07 | Sven Olerud | A device for use in surgical spinal operations in which vertebrae fixating instruments are used |
| CN201912218U (en) * | 2010-12-31 | 2011-08-03 | 杨惠林 | Device for extending and fixing pedicle of vertebral arch |
| WO2011133690A2 (en) * | 2010-04-20 | 2011-10-27 | Warsaw Orthopedic, Inc. | Transverse and sagittal adjusting screw |
| CN202223329U (en) * | 2011-09-19 | 2012-05-23 | 苏州欣荣博尔特医疗器械有限公司 | Vertebral canal expansion bolt |
| CN203369951U (en) * | 2013-07-17 | 2014-01-01 | 上海拓腾医疗器械有限公司 | Single-axis pedicle screw |
| US20140066991A1 (en) * | 2012-08-28 | 2014-03-06 | Warsaw Orthopedic, Inc. | Bone fastener and methods of use |
| CN203564323U (en) * | 2013-11-27 | 2014-04-30 | 南方医科大学 | Improved vertebral pedicle extending device |
| CN104010594A (en) * | 2011-10-21 | 2014-08-27 | 创新外科器械设计有限公司 | Surgical implants for percutaneous lengthening of spinal pedicles to correct spinal stenosis |
| CN204734534U (en) * | 2015-05-26 | 2015-11-04 | 王欢 | Components of a whole that can function independently extension pedicle of vertebral arch screw |
-
2015
- 2015-05-26 CN CN201510270832.XA patent/CN104887300A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994014385A1 (en) * | 1992-12-22 | 1994-07-07 | Sven Olerud | A device for use in surgical spinal operations in which vertebrae fixating instruments are used |
| WO2011133690A2 (en) * | 2010-04-20 | 2011-10-27 | Warsaw Orthopedic, Inc. | Transverse and sagittal adjusting screw |
| CN201912218U (en) * | 2010-12-31 | 2011-08-03 | 杨惠林 | Device for extending and fixing pedicle of vertebral arch |
| CN202223329U (en) * | 2011-09-19 | 2012-05-23 | 苏州欣荣博尔特医疗器械有限公司 | Vertebral canal expansion bolt |
| CN104010594A (en) * | 2011-10-21 | 2014-08-27 | 创新外科器械设计有限公司 | Surgical implants for percutaneous lengthening of spinal pedicles to correct spinal stenosis |
| US20140066991A1 (en) * | 2012-08-28 | 2014-03-06 | Warsaw Orthopedic, Inc. | Bone fastener and methods of use |
| CN203369951U (en) * | 2013-07-17 | 2014-01-01 | 上海拓腾医疗器械有限公司 | Single-axis pedicle screw |
| CN203564323U (en) * | 2013-11-27 | 2014-04-30 | 南方医科大学 | Improved vertebral pedicle extending device |
| CN204734534U (en) * | 2015-05-26 | 2015-11-04 | 王欢 | Components of a whole that can function independently extension pedicle of vertebral arch screw |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107307899A (en) * | 2016-12-31 | 2017-11-03 | 王文军 | Multi-segmental tandem spinal external fixator |
| CN106580415A (en) * | 2017-01-19 | 2017-04-26 | 张衣北 | Low-profile bidirectional locking large-angle universal pedicle screw |
| CN108498155A (en) * | 2018-04-26 | 2018-09-07 | 重庆医科大学附属永川医院 | A kind of anti-rotation pedicle screw of self-locking and its application method |
| CN108498155B (en) * | 2018-04-26 | 2023-06-20 | 重庆医科大学附属永川医院 | Self-locking anti-rotation pedicle screw and use method thereof |
| CN109316231A (en) * | 2018-12-03 | 2019-02-12 | 重庆医科大学附属第二医院 | Percutaneous posterior cervical single open-door internal fixation system |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150909 |