WO2003041601A1 - Dispositif permettant d'assembler un support longitudinal et un moyen de fixation osseuse - Google Patents
Dispositif permettant d'assembler un support longitudinal et un moyen de fixation osseuse Download PDFInfo
- Publication number
- WO2003041601A1 WO2003041601A1 PCT/CH2001/000667 CH0100667W WO03041601A1 WO 2003041601 A1 WO2003041601 A1 WO 2003041601A1 CH 0100667 W CH0100667 W CH 0100667W WO 03041601 A1 WO03041601 A1 WO 03041601A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- connecting part
- cavity
- longitudinal axis
- ring
- bone fixation
- Prior art date
Links
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
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7035—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other
- A61B17/7037—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other wherein pivoting is blocked when the rod is clamped
-
- 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
- A61B17/7001—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
Definitions
- the invention relates to a device for connecting a longitudinal member with a bone fixation means, in particular a pedicle screw, according to the preamble of patent claim 1.
- devices which comprise pedicle screws, at least one longitudinal carrier and connecting parts for fastening the pedicle screws to the longitudinal carrier.
- the pedicle screws are screwed into the pedicles of the individual vertebrae to be connected and fastened with the screw head in the connection part.
- the pedicle screws must, on the one hand, be firmly anchored in the pedicles and, on the other hand, be rigidly connectable to the longitudinal carrier.
- the connection between the screw head and the connecting part is usually via a clamping mechanism, which must allow a stable connection even at different angles between the screw axis and the axis of the longitudinal member.
- the clamp connection must be detachable, so that the entire implant without large tissue openings in the area of the spine can be removed again.
- Such a device for connecting pedicle screws with a side member is known from DE 43 07 576 Biedermann.
- the screw head is spherical.
- the connecting part comprises a coaxial cavity, which tapers concavely concavely against the lower end of the connecting part, so that the screw head is pivotably received in the connecting part about three mutually perpendicular axis.
- the connecting part further comprises a closed against the lower end of the connecting part with a channel perpendicular to the longitudinal axis of the connecting part standing channel axis.
- the channel is open at the upper end of the connecting part, so that a longitudinal beam with parallel to the axis axis extending axis can be inserted therein.
- a first stud in an internal thread in Screwed cavity whereby the screw head of the pedicle screw in the connection part is fixable.
- the longitudinal member is fixed by means of a second stud, which is also screwed into the internal thread in the cavity in the channel.
- a clamping ring is coaxially inserted into the cavity instead of the first stud, which is pressed during fixing of the longitudinal member of this on the screw head.
- a disadvantage of the embodiment with the clamping ring is that in the implantation of the pedicle screw together with the connecting part, pedicle screw, clamping ring and connecting part are not secured against falling apart.
- the invention aims to remedy this situation.
- the invention has for its object to provide a device in which the longitudinal beam and the clamping means can be inserted only after the implantation of the bone fixation means and the connecting part and the connecting part is not already connected during implantation of the bone fixation means with this.
- the connecting part of the device according to the invention has a much smaller overall height and a smaller diameter than the previously known, similar devices.
- the invention solves the stated object with a device for connecting a longitudinal member with a bone fixation means, in particular a pedicle screw, which has the features of claim 1.
- the inventive device for connecting a longitudinal member with a bone fixation means comprises a connecting part with tensioning means.
- the connecting part is equipped with a connecting part coaxial with the longitudinal axis penetrating cavity, which is formed by at least one shoulder tapers against the lower end.
- the connecting part comprises a connecting part transverse to the longitudinal axis penetrating channel for receiving a longitudinal member.
- the clamping means which are formed, for example, as a screw or stud and coaxially screwed into this at the upper end of the connecting part, a longitudinal carrier inserted in the channel is pressed onto a clamping ring, whereby an example, spherical upper segment of an inserted into the connecting part bone fixation means between the clamping ring and the paragraph in the cavity can be clamped and thereby a side member and a Bone fixation agents are fastened in the connection part.
- the connecting member is implantable together with a bone fixation means without longitudinal beams and during implantation, the upper segment of the bone fixation means and the clamping ring are held in the connecting part, axially fixed locking means are arranged in the cavity above the clamping ring with respect to the longitudinal axis, which the cavity against the upper end narrow the connecting parts so that the clamping ring can not pass this locking means against the upper end of the connecting part.
- the locking means consist of two pins which are inserted diametrically into the connecting part, so that they narrow the cavity above the clamping ring.
- a snap ring can be introduced into a above the clamping ring in the cavity mounted groove. The snap ring and the groove are then dimensioned so that the snap ring projects into the cavity.
- the bone fixation means such as a pedicle screw or a Pedikelhaken is axially locked in the connecting part prior to surgery, whereby the pre-implant is insertable by a single instrument, easier handling for the surgeon arises and the risk of losing one of the parts during the Implantation is eliminated.
- the clamping means preferably consist of a closure cap, which can be screwed coaxially to the longitudinal axis in an internal thread in the cavity at the upper end of the connecting part, and a coaxial screwed into the cap clamping screw.
- the core diameter of the external thread of the clamping screw at the rear end of the clamping screw increases, so that during pre-assembly of the implant, the clamping screw can be screwed into the closure cap up to a resistance generated by the widened core diameter of the thread.
- the shoulder which narrows the cavity against the lower end of the connecting part, is of spherical design, so that the likewise spherically formed upper segment of a bone fixation means can be rotatably mounted there about three mutually perpendicular axes.
- a spherically shaped shoulder a plurality of concentric, cylindrical sections, the edges of which lie on an imaginary spherical surface, may be arranged in the cavity. This results in the advantage that when fixing the device, these edges are easily pressed into the spherical upper segment of a bone fixation, whereby a more stable, positive connection is rashbaren.
- this additionally comprises a ring divided into several sectors, which is inserted in the cavity between the lower end of the connecting part and the upper segment of a bone fixation means.
- a bone fixation device designed as a pedicle screw can have a screw shaft with a larger diameter because the tapered section of the cavity at the lower end of the connection part can have a larger diameter due to the split ring and the split ring can have a smaller section Diameter than the screw shaft and the upper segment can be used on the pedicle screw.
- this ring comprises two ring sectors, which are provided at their adjacent end faces with complementary means for forming a plug-in closure, clamp closure or snap closure.
- this additionally comprises a bone fixation agent.
- the ball-shaped upper segment of the bone fixation means is received in the cavity so that its directed against the lower segment part rests on the shoulder in the cavity.
- Terminally on the ball-shaped upper segment of the bone fixation means is a coaxially displaceable in the cavity clamping ring with a constricted against the upper end of the connecting part, spherical cavity to the plant.
- the upper segment is received between the heel and the clamping ring so that the bone fixation means is rotatably mounted about three mutually perpendicular axes in the connecting part.
- the preassembled implant without a longitudinal support and without cap is removed with a screwdriver from the implant container during the surgical procedure without the need for another instrument for holding the implant and without the surgeon having to pre-assemble parts.
- the locking means By the locking means, the connecting part, the clamping ring and the bone fixation means are held together, wherein the spherical, upper segment of the bone fixation means is placed between the shoulder in the cavity of the connecting part and the clamping ring.
- the implant is screwed into the prepared pedicle.
- the pre-assembled cap is removed from the implant container using the previously used screwdriver.
- a special holding instrument is also omitted here.
- the implants are pre-assembled, which thereby less time required in the operating room is required and also the risk potential by e.g. Confusion or incorrect assembly is significantly reduced;
- FIG. 1 shows a longitudinal section through the preferred embodiment of the inventive device.
- FIG. 2 shows a longitudinal section through a further embodiment of the device according to the invention.
- Fig. 4 is a plan view of a multi-part ring according to an embodiment of the inventive device.
- the bone fixation means 4 designed as a pedicle screw consists essentially of a spherical upper segment 6, which serves as a screw head, and a lower segment 7, which is designed as a cylindrical screw shaft 26 with an external thread 38 and serves for screwing into a pedicle.
- the connecting part 1, which serves for removably blockable recording of a longitudinal member 8 and a bone fixation means 4 is formed as a longitudinal axis 10 to a coaxial hollow body with the upper end 11, the lower end 12 and a coaxial with the longitudinal axis 10 cavity 13.
- the cavity 13 penetrates the connecting part 1 from the upper end 11 to the lower end 12 and is tapered at the lower end 12 by two concentric to the longitudinal axis 10 paragraphs 14 with circular edges 17.
- the edges 17 on the shoulders 14 lie on an imaginary spherical surface, so that the upper, spherically formed segment 6 of the bone fixation means 4 rotatably rests on the shoulders 14 about three mutually perpendicular axes.
- the connecting part 1 comprises an open towards the upper end 11 of the connecting part 1, transverse to the longitudinal axis extending channel 15, which serves to receive a longitudinal member 8.
- a clamping ring 2 Arranged in the cavity 13 is a clamping ring 2 which is displaceable coaxially with respect to the longitudinal axis 10 and has a first end 21 directed against the upper end 11 of the connecting part 1, an axially opposite second end 22 and a spherical cavity 20 concentric with the longitudinal axis 10, on the wall of which likewise spherically configured, upper segment 6 terminal can be brought to bear.
- the cavity 20 tapers against the first end 21 of the clamping ring 2, so that a compressive force exerted on the clamping ring 2 can be transmitted to the upper segment 6 of the bone fixation means 4.
- the screw shaft 26 is guided through the constricted cavity 13, so that it projects beyond the lower end 12 of the connecting part 1.
- a screwdriver (not shown) arranged such that the screwdriver pushed from the upper end 11 of the connecting part 1 through the cavity 13 and into the means 28, which here as Hexagon socket are formed, can be introduced.
- the longitudinal member 8 is inserted into the channel 15 and coaxial with the longitudinal axis 10 a clamping means 9 with an external thread 24 in the complementary internal thread 23 in the cavity 13 at the upper end 11 of the connecting part 1 screwed.
- the channel 15 has from the upper end 11 of the connecting part 1 has a depth, which allows that after insertion of the bone fixation means 4 and the clamping ring 2 in the connecting part 1 of the longitudinal member 8 on the first end 21 of the clamping ring 2 can be brought into abutment.
- the clamping means 9 thereby comprise a closure cap 18 with a coaxial to the longitudinal axis 10, the external thread 24 having threaded shank 25 which has a smaller outer diameter than the terminal segment of the cap 18, and also to the longitudinal axis 10 coaxial clamping screw 19 with a front end 32 and a rear end 33.
- the cap 18 has a coaxial to the longitudinal axis 10, central internal thread 38, wherein the external thread 40 of the clamping screw 19 can be screwed.
- the clamping screw 19 When screwed onto the connecting part 1 cap 18, the clamping screw 19 can be axially screwed in until its front end 32 rests on the side member 8.
- second means 34 for receiving a screwdriver are arranged at its rear end 33. In the embodiment shown here, these means 34 are also formed as a hexagon socket.
- the core diameter of the external thread 40 on the clamping screw 19 increases towards the rear end 33 of the clamping screw 19, so that when partially screwed into the cap 18 clamping screw 19 by means of a screwdriver inserted into the second means 34, the cap 18 is first screwed into the connecting part 1 , And if the tightening torque exceeds a certain value, the clamping screw 19 is further screwed into the cap 18 until the front end 32 of the clamping screw 19 presses on the side member 8. Upon further tightening of the clamping screw 19 of the longitudinal member 8 is fixed in the device.
- the cap 18 and the clamping screw 19 are screwed into the connecting part 1, wherein the front end 32 of the clamping screw 19 presses on the longitudinal member 8, this presses in the sequence on the clamping ring 2, whereby together with the longitudinal member the upper segment 6 of the bone fixation means 4 in the connection part 1 can be blocked.
- the bone fixation means 4 and the clamping ring 2 are inserted into the connecting part 1.
- transverse bores 29 are arranged transversely to the axis of the longitudinal member 8 between the upper end 11 of the connecting part 1 and the first end 21 of the clamping ring 2 in the preassembled state of the device.
- the pressed-in pins 30 protrude into the cavity 13 and narrow it at the first end 21 of the clamping ring 2 perpendicular to the longitudinal axis 10, so that formed by the pins 30 a parallel to the longitudinal axis 10 stop for the clamping ring 2 against the upper end 11 of the connecting part 1 becomes.
- the illustrated in Fig. 2 embodiment of the inventive device differs from the embodiment shown in Fig. 1 only in that the locking means 3 are performed by a snap ring 31 instead of pins 30.
- the snap ring 31 is received in a groove 16 which is arranged at the first end 21 of the clamping ring 2 and protrudes into the cavity 13, so that the cavity 13 is narrowed corresponding to the task described under Fig. 1.
- the groove 16 lies between the first end 21 and the second end 22 of the clamping ring 2, so that the longitudinal member 8 does not rest on the snap ring 31.
- the clamping ring 2 is designed, for example, offset between its first end 21 and its second end 22 and has at its first end 21 a first, cylindrical segment 35, which has a smaller diameter than the second, adjacent to the second end 22 of the clamping ring 2 Segment 36.
- the between the first and second segments 35; 36 lying shoulder 37 can be brought to the detent ring 3 designed as locking means 3 to the plant, so that the clamping ring 36 is locked by the snap ring 31 in the cavity 13 against axial displacement against the upper end 11 of the connecting part 1.
- the first segment 35 protrudes axially between the shoulder 14 and the clamping ring 2 introduced upper segment 6 of the bone fixation means 4 through the annular opening of the snap ring 31, so that the longitudinal member 8 can rest on the first end 21 of the clamping ring 2.
- the embodiment of the device according to the invention shown in FIG. 3 differs from the embodiment shown in FIG. 1 only in that between the upper, spherically configured segment 6 of the bone fixation means 4 and the shoulder 14 at the lower end 12 of the connecting part 1 into two sectors divided ring 41 having a lower and an upper end 44, 43 is inserted.
- the diameter of the central bore 42 of the ring 41 is smaller than the maximum diameter of the upper segment 6 of the bone fixation means 4, so that the upper segment 6 is locked by the ring 41 axially against the lower end 12 of the connecting part 1.
- the bore 42 is extended stepwise at the upper end 43 of the ring 41, so that axially spaced two concentric to the longitudinal axis 10, circular edges 17 are formed. These edges 17 lie on an imaginary spherical surface.
- This embodiment of the bore 42 at the upper end 43 of the ring 41 ensures that the upper, spherical segment 6 of the bone fixation means 4 is rotatably mounted on the ring 41 such that the central axis 5 of the bone fixation means 4 is perpendicular to each other about three mutually perpendicular axes Longitudinal axis 10 of the connecting part 1 is rotatable.
- the ring 41 can also be used in the embodiment of the device according to the invention shown in FIG. 2.
- FIG. 4 an embodiment of a two-part ring 41 with a first ring sector 45 and a second ring sector 46 is shown.
- the ring sectors 45, 46 touch each other at the separating surface with their end faces 49, 50.
- At the end surfaces 49 of the first annular sector 45 are each a tapered against the end face 49 recess 48 is mounted, while 48 complementary pins 47 are arranged on the end faces 50 of the second ring sector 46 to the recesses.
- the two ring sectors 45, 46 can be pushed apart or joined together by displacing the ring sectors 45, 46 relative to each other.
- the recesses 48 and the pins 47 may be designed to be conically conically parallel to the longitudinal axis 10 (FIGS.
- the pins 47 and the recesses 48 may be arranged perpendicular to the end faces 49, 50, whereby the two ring sectors 45, 46 by moving the ring sectors 45, 46 perpendicular to the end faces 49, 50th can be connected to each other.
- a snap closure for example a bayonet connection between the two ring sectors 45, 46, is also possible.
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Neurology (AREA)
- Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
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Abstract
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CH2001/000667 WO2003041601A1 (fr) | 2001-11-14 | 2001-11-14 | Dispositif permettant d'assembler un support longitudinal et un moyen de fixation osseuse |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CH2001/000667 WO2003041601A1 (fr) | 2001-11-14 | 2001-11-14 | Dispositif permettant d'assembler un support longitudinal et un moyen de fixation osseuse |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003041601A1 true WO2003041601A1 (fr) | 2003-05-22 |
Family
ID=4358259
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CH2001/000667 WO2003041601A1 (fr) | 2001-11-14 | 2001-11-14 | Dispositif permettant d'assembler un support longitudinal et un moyen de fixation osseuse |
Country Status (1)
Country | Link |
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WO (1) | WO2003041601A1 (fr) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1935358A1 (fr) * | 2006-12-22 | 2008-06-25 | BIEDERMANN MOTECH GmbH | Dispositif d'ancrage d'os |
EP2135574A1 (fr) * | 2008-06-19 | 2009-12-23 | BIEDERMANN MOTECH GmbH | Ensemble pour ancrage osseux |
EP2370007A1 (fr) * | 2008-10-13 | 2011-10-05 | Blackstone Medical, Inc. | Système de raccordement multiaxial |
CN111447884A (zh) * | 2017-12-15 | 2020-07-24 | 华沙整形外科股份有限公司 | 脊柱植入系统和使用方法 |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0465158A2 (fr) * | 1990-07-04 | 1992-01-08 | Seyed Mohammad Hossein Mehdian | Dispositif pour traiter des affections de la colonne vertébrale |
DE4307576C1 (de) | 1993-03-10 | 1994-04-21 | Biedermann Motech Gmbh | Knochenschraube |
US5716356A (en) * | 1994-07-18 | 1998-02-10 | Biedermann; Lutz | Anchoring member and adjustment tool therefor |
US5797911A (en) * | 1996-09-24 | 1998-08-25 | Sdgi Holdings, Inc. | Multi-axial bone screw assembly |
US6063090A (en) * | 1996-12-12 | 2000-05-16 | Synthes (U.S.A.) | Device for connecting a longitudinal support to a pedicle screw |
US6090111A (en) * | 1998-06-17 | 2000-07-18 | Surgical Dynamics, Inc. | Device for securing spinal rods |
WO2001003591A1 (fr) * | 1999-07-07 | 2001-01-18 | Synthes Ag Chur | Vis a os a ajustage angulaire et dispositif de fixation pour os en os de synthese |
US20010001119A1 (en) * | 1999-09-27 | 2001-05-10 | Alan Lombardo | Surgical screw system and related methods |
US6280442B1 (en) * | 1999-09-01 | 2001-08-28 | Sdgi Holdings, Inc. | Multi-axial bone screw assembly |
-
2001
- 2001-11-14 WO PCT/CH2001/000667 patent/WO2003041601A1/fr not_active Application Discontinuation
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0465158A2 (fr) * | 1990-07-04 | 1992-01-08 | Seyed Mohammad Hossein Mehdian | Dispositif pour traiter des affections de la colonne vertébrale |
DE4307576C1 (de) | 1993-03-10 | 1994-04-21 | Biedermann Motech Gmbh | Knochenschraube |
US5716356A (en) * | 1994-07-18 | 1998-02-10 | Biedermann; Lutz | Anchoring member and adjustment tool therefor |
US5797911A (en) * | 1996-09-24 | 1998-08-25 | Sdgi Holdings, Inc. | Multi-axial bone screw assembly |
US6063090A (en) * | 1996-12-12 | 2000-05-16 | Synthes (U.S.A.) | Device for connecting a longitudinal support to a pedicle screw |
US6090111A (en) * | 1998-06-17 | 2000-07-18 | Surgical Dynamics, Inc. | Device for securing spinal rods |
WO2001003591A1 (fr) * | 1999-07-07 | 2001-01-18 | Synthes Ag Chur | Vis a os a ajustage angulaire et dispositif de fixation pour os en os de synthese |
US6280442B1 (en) * | 1999-09-01 | 2001-08-28 | Sdgi Holdings, Inc. | Multi-axial bone screw assembly |
US20010001119A1 (en) * | 1999-09-27 | 2001-05-10 | Alan Lombardo | Surgical screw system and related methods |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10194947B2 (en) | 2004-08-27 | 2019-02-05 | Blackstone Medical, Inc. | Multi-axial connection system |
US8951290B2 (en) | 2004-08-27 | 2015-02-10 | Blackstone Medical, Inc. | Multi-axial connection system |
US8784455B2 (en) | 2006-12-22 | 2014-07-22 | Biedermann Technologies Gmbh & Co. Kg | Bone anchoring device |
EP2322107A1 (fr) * | 2006-12-22 | 2011-05-18 | Biedermann Motech GmbH | Dispositif d'ancrage d'os |
EP1935358A1 (fr) * | 2006-12-22 | 2008-06-25 | BIEDERMANN MOTECH GmbH | Dispositif d'ancrage d'os |
US8343191B2 (en) | 2006-12-22 | 2013-01-01 | Biedermann Technologies Gmbh & Co. Kg | Bone anchoring device |
US9144437B2 (en) | 2008-06-19 | 2015-09-29 | Biedermann Technologies Gmbh & Co. Kg | Bone anchoring assembly |
TWI480019B (zh) * | 2008-06-19 | 2015-04-11 | Biedermann Technologies Gmbh | 骨骼固定總成 |
EP2135574A1 (fr) * | 2008-06-19 | 2009-12-23 | BIEDERMANN MOTECH GmbH | Ensemble pour ancrage osseux |
EP2370007A4 (fr) * | 2008-10-13 | 2013-05-29 | Blackstone Medical Inc | Système de raccordement multiaxial |
EP2370007A1 (fr) * | 2008-10-13 | 2011-10-05 | Blackstone Medical, Inc. | Système de raccordement multiaxial |
EP2990000A1 (fr) * | 2008-10-13 | 2016-03-02 | Blackstone Medical, Inc. | Système de raccordement multiaxial |
CN111447884A (zh) * | 2017-12-15 | 2020-07-24 | 华沙整形外科股份有限公司 | 脊柱植入系统和使用方法 |
US11559334B2 (en) | 2017-12-15 | 2023-01-24 | Warsaw Orthopedic, Inc. | Spinal implant system and methods of use |
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