CN105232137A - Anti-loosing minimally-invasive U-shaped pedicle screw - Google Patents
Anti-loosing minimally-invasive U-shaped pedicle screw Download PDFInfo
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- CN105232137A CN105232137A CN201510741489.2A CN201510741489A CN105232137A CN 105232137 A CN105232137 A CN 105232137A CN 201510741489 A CN201510741489 A CN 201510741489A CN 105232137 A CN105232137 A CN 105232137A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- 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 or setting implements
- 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, e.g. stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7032—Screws or hooks with U-shaped head or back through which longitudinal rods pass
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- 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 or setting implements
- 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, e.g. stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- 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 or setting implements
- 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, e.g. 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
- 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 or setting implements
- 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
- A61B17/8605—Heads, i.e. proximal ends projecting from bone
- A61B17/861—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver
- A61B17/8615—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver at the central region of the screw head
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- 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 or setting implements
- 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
- A61B17/8605—Heads, i.e. proximal ends projecting from bone
- A61B17/861—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver
- A61B17/862—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver at the periphery of the screw head
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B2017/564—Methods for bone or joint treatment
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- 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 an anti-loosing minimally-invasive U-shaped pedicle screw. The anti-loosing minimally-invasive U-shaped pedicle screw comprises a U-shaped nail, a lock block, a lock cap and a nail rod. The U-shaped nail is provided with a screw part. A nail base is arranged at the upper end of the screw part. A blind hole is formed in the upper end of the nail base. U-shaped grooves are formed in the two sides of the blind hole. The nail rod is arranged at the bottoms of the U-shaped grooves. The lock block is provided with a lock body which is provided with a groove, the lock block is arranged in the blind hole, and the groove is buckled to the nail rod. The lock cap is composed of a body and two ear nails. The upper end of the body is provided with a tool hole. A threaded hole is formed in the lower end of the tool hole. The two lug nails are arranged on the two sides of the outer edge of the body and are provided with nail bars. The inner ends of the nail bars are fixedly connected to the outer edge of the body. The lock cap is arranged on the body. A screw rod is further arranged at the upper end of the lock body and matched with an internal threaded hole. Transverse opening grooves are formed in the two side walls of the U-shaped grooves and rotate along the axis of the nail base, the screwing direction of the transverse opening grooves is opposite to that of threads of the internal threaded hole, openings of the transverse opening grooves are formed in the U-shaped grooves, the nail bars of the lock cap are screwed into the transverse opening grooves, and meanwhile the lock block is pushed forwards so that the nail rod can be locked.
Description
Technical field
The present invention relates to orthopedic medical device field, especially a kind of U-shaped pedicle nail.
Background technology
Minimally Invasive Surgery is widely used in recent years, and the Wicresoft's application of U-shaped pedicle nail in spinal operation also gets more and more, and is applicable to the diseases such as treatment thoracic and lumbar vertebral posterior short segment wound, tumor and unstable spine.The U-shaped pedicle nail of current Wicresoft, primarily of U-shaped nail, locking jackscrew and nail rod composition.The locking mode of its nail rod, by the screw-internal thread fit on the U-shaped nail seat two side of jackscrew and U-shaped nail and pressing pin is excellent, when coupling mechanism force is larger, exist nail seat two side softened or support distortion defect, thus cause the possibility that nail rod loosens or exits, and, postoperative time return period is longer, during this, human body needs activity, can make pedicle nail that long fine motion occurs, thus simple jackscrew directly compresses mode, also there is the possibility loosening and even move back rod, and structural volume is comparatively large, is unfavorable for stitching and the treatment of otch.
Summary of the invention
The U-shaped pedicle nail of a kind of locking Wicresoft of the present invention, mainly comprise U-shaped nail, lock dog and nail rod, described U-shaped nail is provided with screw division, described screw division upper end is provided with nail seat, described nail seat upper end is provided with blind hole, described blind hole both sides are provided with the U-type groove of its wall thickness through, described nail rod is placed in described U-type groove bottom land, described lock dog is provided with lock body, described lock body side is provided with the through groove that Open Side Down, described lock dog is placed in described blind hole, described groove bandit is in the top of nail rod, it is characterized in that: the U-shaped pedicle nail of locking Wicresoft also comprises lock nut, described lock nut is followed closely by body and two ears and is formed, the upper end of described body is provided with tooling hole, lock nut is rotated for engagement tool, described tooling hole lower end is provided with internal thread hole, described two ear nails are symmetricly set in the outer rim both sides of described body, every piece of ear nail is provided with nail bar, the inner segment end of nail bar is consolidated in the outer rim of described body, described body is positioned at the upper end of the described lock body of described blind hole, the upper end of described lock body is provided with screw rod, described screw rod and described internal thread hole are equipped with, the two side of described U-type groove is respectively equipped with the transverse opening groove of its wall thickness through, described transverse opening groove with nail seat axis for axle transverse rotation forms, its rotation direction is contrary with the rotation direction of described internal thread hole screw thread, its opening is located in described U-type groove, the nail bar of described lock nut screws in described transverse opening groove, lock dog is pushed ahead the locking of described nail rod simultaneously.
As the further improvement to foregoing invention, guide, retaining mechanism and stopping mechanism is provided with at the upper side of described transverse opening groove, when described nail bar is threaded to described stopping mechanism, described groove is by the locking of described nail side, and described stopping mechanism can stop described lock nut to turn round, or increase the pivotal resistance of described lock nut, thus stop loosening of described nail rod.Described guide is by the face of the downward spiral of the upper oral part of described U-type groove, after described retaining mechanism is located at guide, and by described guide level or screw backspin then the face become, after described stopping mechanism is located at described retaining mechanism, and the face of upwards spiralization by described retaining mechanism, the lead angle of described retaining mechanism is less than the lead angle of described internal thread hole screw thread.
Further improve as to foregoing invention, described lock body and described blind hole are equipped with, the both sides of described groove are respectively equipped with the inclined-plane to lower open mouth, and be pressed on nail rod 4 from the both sides more than excellent axis of described nail respectively by described inclined-plane, make described lock body and described blind hole form two wedge-locks and mark closely excellent structure, further increase the coupling mechanism force to nail rod and retaining power, simultaneously in order to stop U-type groove two side outwards to strut distortion, nail dish is respectively equipped with in two outer ends of described nail bar, in order to reduce overall volume of the present invention, also be provided with counterbore open slot in two outer end correspondences of described transverse opening groove, described nail dish is made to screw in described counterbore open slot with described nail bar, and fit with the inner face of described counterbore open slot and arrange.
The U-shaped pedicle nail of a kind of locking Wicresoft of the present invention, structure is simple, easy to operate, have employed screw press and coordinate wedge shape lock mode, also be furnished with locking gear, there is larger coupling mechanism force and locking power, therefore, enhance steadiness and the safety of spinal operation, thus effectively can improve the success rate of operation.
Accompanying drawing illustrates:
Fig. 1 is the schematic diagram of the U-shaped pedicle nail embodiment of a kind of locking Wicresoft of the present invention;
Fig. 2 is the schematic diagram of U-shaped nail in Fig. 1;
Fig. 3 is the schematic diagram of lock nut in Fig. 1;
Fig. 4 is the schematic diagram of lock dog in Fig. 1.
In accompanying drawing: 1U sprig, 2 lock nuts, 3 lock dogs, 4 nail rods, 1-1 screw division, 1-2 nail seat, 1-3 holds nail nest, 1-4 blind hole, 1-5U type groove, 1-6 transverse opening groove, 1-7 counterbore open slot, 1-6-1 guide, 1-6-2 retaining mechanism, 1-6-3 stopping mechanism, 2-1 body, 2-2 follows closely bar, 2-3 nail dish, 2-4 internal thread hole, 2-5 tooling hole, 3-1 screw rod, 3-2 lock body, 3-3 groove, 3-4 inclined-plane.
Embodiment:
Fig. 1 to Fig. 4 shows the embodiment of the U-shaped pedicle nail of a kind of locking Wicresoft of the present invention.
The U-shaped pedicle nail of a kind of locking Wicresoft of the present invention, mainly comprise U-shaped nail 1, lock dog 3 and nail rod 4, described U-shaped nail 1 is provided with screw division 1-1, described screw division 1-1 upper end is provided with nail seat 1-2, described nail seat 1-2 upper end is provided with blind hole 1-4, described blind hole 1-4 both sides are provided with the U-type groove 1-5 of its wall thickness through, described nail rod 4 is placed in described U-type groove 1-5 bottom land, described lock dog 3 is provided with lock body 3-2, described lock body 3-2 side is provided with the through groove 3-3 that Open Side Down, described lock dog 3 is placed in described blind hole 1-4, described groove 3-3 bandit is in the top of nail rod 4, it is characterized in that: the U-shaped pedicle nail of locking Wicresoft also comprises lock nut 2, described lock nut 2 is followed closely by body 2-1 and two ears and is formed, the upper end of described body 2-1 is provided with tooling hole 2-5, lock nut 2 is rotated for engagement tool, described tooling hole 2-5 lower end is provided with internal thread hole 2-4, described two ear nails are symmetricly set in the outer rim both sides of described body 2-1, every piece of ear nail is provided with nail bar 2-2, the inner of nail bar 2-2 is consolidated in the outer rim of described body 2-1, described body 2-1 is positioned at the upper end of the described lock body 3-2 of described blind hole 1-4, the upper end of described lock body 3-2 is provided with screw rod 3-1, described screw rod 3-1 and described internal thread hole 2-4 is equipped with, the two side of described U-type groove 1-5 is respectively equipped with the transverse opening groove 1-6 of its wall thickness through, described transverse opening groove 1-6 with nail seat 1-2 axis for axle transverse rotation forms, its rotation direction is contrary with the rotation direction of described internal thread hole 2-4 screw thread, its opening is located in described U-type groove 1-5, the nail bar 2-2 of described lock nut 2 screws in described transverse opening groove 1-6, lock dog 3 is pushed ahead the locking of described nail rod simultaneously.
As the further improvement to foregoing invention, guide 1-6-1, retaining mechanism 1-6-2 and stopping mechanism 1-6-3 is provided with at the upper side of described transverse opening groove 1-6, when described nail bar 2-2 is threaded to described stopping mechanism 1-6-3, described nail side 4 locks by described groove 3-3, and described stopping mechanism 1-6-3 can stop described lock nut 2 to turn round, or increase the pivotal resistance of described lock nut 2, thus stop loosening of described nail rod 4.Described guide 1-6-1 is by the face of the downward spiral of the upper oral part of described U-type groove 1-6, after described retaining mechanism 1-6-2 is located at guide 1-6-1, and by described guide 1-6-1 level or screw backspin then the face become, after described stopping mechanism 1-6-3 is located at described retaining mechanism 1-6-2, and the face of upwards spiralization by described retaining mechanism 1-6-2, the lead angle of described retaining mechanism 1-6-2 is less than the lead angle of described internal thread hole 2-4 screw thread.
Further improve as to foregoing invention, described lock body 3-2 and described blind hole 1-4 is equipped with, the both sides of described groove 33 are respectively equipped with the inclined-plane 3-4 to lower open mouth, and be pressed on nail rod 4 from both sides more than excellent 4 axis of described nail respectively by described inclined-plane 3-4, make described lock body 3-2 and described blind hole 1-4 form two wedge-locks and mark closely excellent structure, further increase the coupling mechanism force to nail rod 4 and retaining power, simultaneously in order to stop U-type groove two side outwards to strut distortion, nail dish 2-3 is respectively equipped with in two outer ends of described nail bar 2-2, in order to reduce overall volume of the present invention, also be provided with counterbore open slot 1-7 in the two outer end correspondences of described transverse opening groove 1-6, described nail dish 2-3 is made to screw in described counterbore open slot 1-7 with described nail bar 2-2, and fit with the inner face of described counterbore open slot 1-7 and arrange.
Claims (5)
1. the U-shaped pedicle nail of locking Wicresoft, mainly comprise U-shaped nail (1), lock dog (3) and nail rod (4), described U-shaped nail (1) is provided with screw division (1-1), described screw division (1-1) upper end is provided with nail seat (1-2), described nail seat (1-2) upper end is provided with blind hole (1-4), described blind hole (1-4) both sides are provided with the U-type groove (1-5) of its wall thickness through, described nail rod (4) is placed in described U-type groove (1-5) bottom land, described lock dog (3) is provided with lock body (3-2), described lock body (3-2) side is provided with the through groove that Open Side Down (3-3), described lock dog (3) is placed in described blind hole (1-4), described groove (3-3) bandit is on nail rod (4), it is characterized in that: the U-shaped pedicle nail of locking Wicresoft also comprises lock nut (2), described lock nut (2) is followed closely by body (2-1) and two ears and is formed, the upper end of described body (2-1) is provided with tooling hole (2-5), described tooling hole (2-5) lower end is provided with internal thread hole (2-4), described two ear nails are symmetricly set in the outer rim both sides of described body (2-1), every piece of ear nail is provided with nail bar (2-2), the inner of nail bar (2-2) is consolidated in the edge garden of described body (2-1), described body (2-1) is positioned at the upper end of described blind hole (1-4) described lock body (3-2), the upper end of described lock body (3-2) is provided with screw rod (3-1), described screw rod (3-1) and described internal thread hole (2-4) are equipped with, the two side of described U-type groove (1-5) is respectively equipped with the transverse opening groove (1-6) of its wall thickness through, described transverse opening groove (1-6) is that axle transverse rotation forms with nail seat (1-2) axis, its rotation direction is contrary with the rotation direction of described internal thread hole (2-4) screw thread, its opening is located in described U-type groove, the nail bar (2-2) of described lock nut (2) screws in described transverse opening groove (1-6), lock dog (3) is pushed ahead the locking of described nail rod simultaneously.
2. the U-shaped pedicle nail of a kind of locking Wicresoft according to claim 1, it is characterized in that: the upper side of described transverse opening groove (1-6) is provided with guide (1-6-1), retaining mechanism (1-6-2) and stopping mechanism (1-6-3), when described nail bar (2-2) is threaded to described stopping mechanism (1-6-3), described nail helps (4) to lock by described groove (3-3), and described stopping mechanism (1-63) can stop described lock nut (2) to turn round.
3. the U-shaped pedicle nail of a kind of locking Wicresoft according to claim 2, it is characterized in that: described guide (1-6-1) is by the face of the downward spiral of upper oral part of described U-type groove (1-6), after described retaining mechanism (1-6-2) is located at guide (1-6-1), and by described guide (1-6-1) level or screw backspin then the face become, after described stopping mechanism (1-6-3) is located at described retaining mechanism (1-6-2), and the face of upwards spiralization by described retaining mechanism (1-6-2), the lead angle of described retaining mechanism (1-6-2) is less than the lead angle of described internal thread hole (2-4) screw thread.
4. the U-shaped pedicle nail of a kind of locking Wicresoft according to claim 1 or 2 or 3, it is characterized in that: described lock body (3-2) and described blind hole (1-4) are equipped with, the both sides of described groove (3-3) are respectively equipped with the inclined-plane (3-4) to lower open mouth, and be pressed on nail rod (4) from both sides more than described nail rod (4) axis respectively by described inclined-plane (3-4), make described lock body (3-2) and described blind hole (1-4) form the structure that two wedge-locks mark closely rod (4).
5. the U-shaped pedicle nail of a kind of locking Wicresoft according to claim 4, it is characterized in that: two outer ends of described nail bar (2-2) are respectively equipped with nail dish (2-3), and be provided with counterbore open slot (1-7) in two outer end correspondences of described transverse opening groove (1-6), make described nail dish (2-3) screw in described counterbore open slot (1-7) with described nail bar (2-2), and fit with the inner face of described counterbore open slot (1-7) and arrange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510741489.2A CN105232137B (en) | 2015-10-29 | 2015-10-29 | A kind of locking minimally invasive U-shaped pedicle nail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510741489.2A CN105232137B (en) | 2015-10-29 | 2015-10-29 | A kind of locking minimally invasive U-shaped pedicle nail |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105232137A true CN105232137A (en) | 2016-01-13 |
| CN105232137B CN105232137B (en) | 2017-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510741489.2A Active CN105232137B (en) | 2015-10-29 | 2015-10-29 | A kind of locking minimally invasive U-shaped pedicle nail |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2398981Y (en) * | 1999-12-15 | 2000-10-04 | 邹德威 | Reduction fixed bone orthopedic appts. |
| US20040260284A1 (en) * | 2003-06-23 | 2004-12-23 | Matthew Parker | Anti-splay pedicle screw |
| WO2006047555A2 (en) * | 2004-10-25 | 2006-05-04 | Alphaspine, Inc. | Bone fixation systems and methods |
| CN201185960Y (en) * | 2008-04-25 | 2009-01-28 | 刘伟强 | Medical vertebral pedicle screw nail mechanism |
| CN203647452U (en) * | 2013-12-09 | 2014-06-18 | 嘉兴德康医疗器械有限公司 | Vertebral pedicle compressing and locking device of spine screw-rod system |
| CN205181461U (en) * | 2015-10-29 | 2016-04-27 | 山东航维骨科医疗器械股份有限公司 | Locking U of wicresoft type pedicle of vertebral arch nail |
-
2015
- 2015-10-29 CN CN201510741489.2A patent/CN105232137B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2398981Y (en) * | 1999-12-15 | 2000-10-04 | 邹德威 | Reduction fixed bone orthopedic appts. |
| US20040260284A1 (en) * | 2003-06-23 | 2004-12-23 | Matthew Parker | Anti-splay pedicle screw |
| WO2006047555A2 (en) * | 2004-10-25 | 2006-05-04 | Alphaspine, Inc. | Bone fixation systems and methods |
| CN201185960Y (en) * | 2008-04-25 | 2009-01-28 | 刘伟强 | Medical vertebral pedicle screw nail mechanism |
| CN203647452U (en) * | 2013-12-09 | 2014-06-18 | 嘉兴德康医疗器械有限公司 | Vertebral pedicle compressing and locking device of spine screw-rod system |
| CN205181461U (en) * | 2015-10-29 | 2016-04-27 | 山东航维骨科医疗器械股份有限公司 | Locking U of wicresoft type pedicle of vertebral arch nail |
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| Publication number | Publication date |
|---|---|
| CN105232137B (en) | 2017-07-18 |
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