DE3630863A1 - Bone screw - Google Patents
Bone screwInfo
- Publication number
- DE3630863A1 DE3630863A1 DE19863630863 DE3630863A DE3630863A1 DE 3630863 A1 DE3630863 A1 DE 3630863A1 DE 19863630863 DE19863630863 DE 19863630863 DE 3630863 A DE3630863 A DE 3630863A DE 3630863 A1 DE3630863 A1 DE 3630863A1
- Authority
- DE
- Germany
- Prior art keywords
- screw
- bone screw
- head
- bone
- torque transmission
- 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.)
- Withdrawn
Links
- 210000000988 bone and bone Anatomy 0.000 title claims abstract description 21
- 230000005540 biological transmission Effects 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 5
- 238000005452 bending Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 230000001054 cortical effect Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/8875—Screwdrivers, spanners or wrenches
-
- 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
-
- 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
- A61B17/8605—Heads, i.e. proximal ends projecting from bone
- A61B17/861—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B31/00—Screwed connections specially modified in view of tensile load; Break-bolts
- F16B31/02—Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load
- F16B31/021—Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load by means of a frangible part
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/03—Automatic limiting or abutting means, e.g. for safety
- A61B2090/037—Automatic limiting or abutting means, e.g. for safety with a frangible part, e.g. by reduced diameter
Abstract
Description
Die Erfindung betrifft eine Knochenschraube der im Ober begriff des Anspruchs 1 angegebenen Art.The invention relates to a bone screw in the upper Concept of claim 1 specified type.
Bei den bekannten Knochenschrauben besteht der Nachteil, daß sie möglicherweise beim lmplantieren so fest angezogen werden, daß der Schaft oder ein anderer Teil der Schraube bricht, so daß die Funktion der Schraube nicht mehr ge währleistet ist. Die Schraube muß in diesem Fall ausge fräst werden, was mit der Zerstörung von plötzlichen Knochenbereichen verbunden ist. Im übrigen kann im Be reich der Ausfräsung keine weitere Schraube angebracht werden.The known bone screws have the disadvantage that that they might be so tight when they were implanted be that the shank or some other part of the screw breaks, so that the function of the screw is no longer ge is guaranteed. In this case, the screw must be removed be milling what with the destruction of sudden Bone areas is connected. For the rest, in Be no further screw is attached to the cutout will.
Der Erfindung liegt die Aufgabe zugrunde, bei Knochen schrauben sicherzustellen, daß die Einschraubmomente einen die Schraube gefährdenden Wert nicht erreichen.The invention is based, with bone screws to ensure that the screwing in torque do not reach the screw dangerous value.
Besonders vorteilhaft ist die Anwendung bei resorbierbarem Implantatmaterial, das spröder ist als die üblicherweise verwendeten Schraubenwerkstoffe. Da derartige Schrauben nicht wieder herausgedreht werden müssen, da der Werkstoff innerhalb des Körpers absorbiert wird, kann nach dem Ein schrauben auch auf die Drehmomentübertragungselemente ver zichtet werden. Lediglich die Zugkraftkomponenten der Schraube aufnehmende Elemente wie Gewinde und Schrauben kopf müssen erhalten bleiben.Use in the case of resorbable is particularly advantageous Implant material that is more brittle than usual used screw materials. Because such screws do not have to be unscrewed again because of the material can be absorbed within the body after the on also screw on the torque transmission elements to be waived. Only the traction components of the Screw-receiving elements such as threads and screws head must be preserved.
Weiterhin ist mit der erfindungsgemäßen Lösung der gegen über den üblichen und bei Knochenschrauben genormten Innensechskanten der Vorteil verbunden, daß der Quer schnitt des Schraubenkopfes nicht durch die entsprechende Ausnehmung geschwächt ist und damit bei der Dimensionie rung der Schraube nicht auf den verringerten Restquer schnitt des Kopfes im Bereich des Grundes des Innensechs kantes Rücksicht genommen zu werden braucht.Furthermore, with the solution according to the invention above the usual and standardized for bone screws Hexagon socket connected the advantage that the cross do not cut the screw head through the corresponding one Recess is weakened and thus in dimension screw on the reduced residual cross cut the head in the area of the bottom of the hexagon socket edge needs to be taken into account.
Bei einer bevorzugten Weiterbildung des die Drehmoment anschlußmittel enthaltenden von der übrigen Schraube durch eine Sollbruchstelle abgetrennten Ansatzes ist die ser bevorzugt derart ballig ausgebildet, daß das Ein schraubwerkzeug in unterschiedlichen, zur Mittelachse der Schraube geneigten Schraubrichtungen angesetzt werden kann, so daß die Übertragung von Biegemomenten auf den Be reich der Sollbruchstelle verhindert ist, so daß die Soll bruchstelle ausschließlich durch das Einschraubmoment be lastet ist.In a preferred development of the torque connection means containing the rest of the screw Approach separated by a predetermined breaking point is ser preferably formed so spherical that the one screwing tool in different, to the central axis of the Screw inclined screw directions can be applied can, so that the transmission of bending moments on the loading range of the predetermined breaking point is prevented, so that the target break point only due to the screwing torque is burdensome.
Die Sollbruchstelle ist in günstiger Weiterbildung der Erfindung als Einschnürung symmetrisch zur Mittelachse der Schraube abgedreht dem Anschluß an die Stirnfläche des Schraubenkopfes angeordnet, so daß diese Fläche nach Ent fernen des Drehmomentübertragungselements einen bündigen Abschluß bildet.The predetermined breaking point is a further development of the Invention as a constriction symmetrical to the central axis of the Unscrewed the connection to the face of the Screw head arranged so that this surface after Ent distal of the torque transmission element a flush Concludes.
Vorteilhafte Weiterbildungen der Erfindung sind in den Un teransprüchen gekennzeichnet bzw. werden nachstehend zusammen mit der Beschreibung der bevorzugten Ausführung der Erfindung anhand der Figuren näher dargestellt.Advantageous developments of the invention are in the Un claims are identified below along with the description of the preferred embodiment the invention with reference to the figures.
Die einzige Figur stellt ein Ausführungsbeispiel der er findungsgemäßen Schraube mit einem mit der Schraube in Eingriff kommenden Teil eines Einschraubwerkzeugs im Quer schnitt dar.The only figure represents an embodiment of the inventive screw with one with the screw in Engaging part of a screwing tool in the cross cut.
Eine Knochenschraube 1 entspricht in ihrem Schaftbereich 2 und dem Gewindeteil 3 der Gestaltung bekannter Knochen schrauben, wobei auch der Kopf 4 in seinem unteren Bereich in bekannter Weise ausgebildet ist. Eine derartige Schraube dient zur Fixierung von Knochenfragmenten oder zum Halten einer Knochenplatte, wobei die Zugkraft durch den Eingriff des Gewindes 3 (auf Spongiosa- oder Kortika lisgewinde) dient und die Gegenkraft von der verrundeten Unterseite des Kopfes 4 aufgenommen wird, die sphärisch ausgebildet ist.A bone screw 1 corresponds in its shaft region 2 and the threaded part 3 to the design of known bones, the head 4 also being designed in a known manner in its lower region. Such a screw is used to fix bone fragments or to hold a bone plate, the tensile force due to the engagement of the thread 3 (on cancellous or cortical lis thread) and the counterforce is absorbed by the rounded underside of the head 4 , which is spherical.
Im Anschluß an die Stirnfläche 5 des Schraubenkopfes ist eine Sollbruchstelle 6 in Form einer Einschnürung vorge sehen, welche derart bemessen ist, daß hier ein Bruch eher eintritt als in den übrigen Schraubenbereichen. Bei üblicher Dimensionierung und sanftem Auslauf der Ein schnürung um Kraftspitzen zu vermeiden ist der Durch messer im Bereich dieser Einschnürung bzw. ist der Quer schnitt dieser Einschnürung also geringfügig geringer auszubilden als der entsprechende Querschnitt des Schaftes 2. (Bei vom runden Querschnitt abweichender Gestaltung ist in jedem Fall auf die übertragbaren Momente abzustellen).Following the end face 5 of the screw head, a predetermined breaking point 6 is provided in the form of a constriction, which is dimensioned such that a break occurs here sooner than in the other screw areas. With customary dimensioning and gentle runout of a constriction to avoid force peaks, the diameter in the region of this constriction or the cross section of this constriction is therefore slightly less than the corresponding cross section of the shaft 2 . (In the case of a design deviating from the round cross-section, the transferable moments must always be taken into account).
Im Anschluß an die Einschnürung 6 ist ein Ansatz 7 vorge sehen, welcher Außensechskantflächen aufweist, die zur Übertragung des maximalen, durch die Sollbruchstelle vor gegebenen Einschraubmoments ausreichend sind. Die Über tragung von Biegemomenten auf die Sollbruchstelle ist zu vermeiden. Da diese zu einem Bruch derselben bei kleineren Drehmomenten führen könnten, sind die Außensechskant flächen derart ballig ausgeführt, daß Abweichungen des Schraubendrehers 8 von der Längsachse der Schraube, d.h. eine Neigung um einen geringen Winkel dieser Richtung nicht zu derartigen Biegemomenten führt, da insoweit die beiden Teile 7 und 8 relativ zueinander beweglich sind. Dieser Umstand des nur teilweisen gegenseitigen Eingriffs wegen der balligen Ausgestaltung ist bei der Dimensio nierung der Drehmomentübertragungsflächen zu berücksich tigen, wobei hier keinerlei Schwierigkeiten auftreten, da der Ansatz 7 ein Verlustelement bildet, der die Größe der im Knochen verbleibenden Schraube nicht beeinflußt.Following the constriction 6 , an approach 7 is easily seen, which has external hex surfaces that are sufficient to transmit the maximum, through the predetermined breaking point before given screwing torque. The transfer of bending moments to the predetermined breaking point should be avoided. Since these could lead to a breakage at smaller torques, the external hexagon surfaces are designed so spherically that deviations of the screwdriver 8 from the longitudinal axis of the screw, ie an inclination by a small angle in this direction, do not lead to such bending moments, since the two of them Parts 7 and 8 are movable relative to each other. This circumstance of only partial mutual intervention because of the spherical configuration is to be taken into account in the dimensioning of the torque transmission surfaces, with no difficulties arising here since the attachment 7 forms a loss element which does not influence the size of the screw remaining in the bone.
Bei dem Schraubendreher 8 handelt es sich um ein Ein schraubelement, welches in negativer Ausbildung als Aus sparung Flächen aufweist, die an den Querschnitt zur Über tragung des Einschraubmoments des Ansatzes 7 angepaßt sind. Bei einer vorteilhaften - nicht dargestellten - Va riante können an Stelle der Flächen des Ansatzes 7 auch die Innenflächen 9 des Schraubendrehers ballig ausgefüllt sein.The screwdriver 8 is a screw-on element, which has a negative design as a savings area that is adapted to the cross-section for transferring the screw-in torque of the projection 7 . In an advantageous - not shown - Va riante, the inner surfaces 9 of the screwdriver can be filled spherically instead of the surfaces of the extension 7 .
Die Knochenschraube 1 besteht bevorzugt aus einem inner halb des Körpers resorbierbarem Werkstoff. Damit braucht die Schraube lediglich in den Knochen eingedreht zu werden und kann mit einem beliebig großen Moment festgezogen wer den, ohne daß Gefahr für die Schraube selbst besteht. Das übertragbare Moment ist begrenzt durch die Festigkeit der Sollbruchstelle, so daß die Trennung hier ein Zeichen für den Chirurgen ist, daß die Schraube mit dem Sollmoment angezogen wurde. The bone screw 1 preferably consists of an inner half of the body absorbable material. So that the screw only needs to be screwed into the bone and can be tightened with an arbitrarily large moment who without the risk of the screw itself. The transmissible torque is limited by the strength of the predetermined breaking point, so that the separation here is a sign for the surgeon that the screw has been tightened to the desired torque.
Um bei einer Korrektur des Schraubensitzes ein Ausschrau ben gegebenenfalls noch zu ermöglichen, sind bevorzugt im Bereich des oberen Teils des Schraubenkopfes 4 Anfasungen 10 vorgesehen, welche in Wechselwirkung mit einer Zange oder dergleichen ein Drehen der Schraube nur in Sonderfäl len ermöglichen sollen. Da diese Flächen sehr weit von der Mittelachse entfernt sind, brauchen sie nicht besonders ausgeprägt ausgebildet zu sein, wobei sie, da sie im obe ren Teil des Kopfes gelegen sind, auch dann noch erreich bar sind, wenn die Schraube fast vollständig eingedreht ist. Auch wenn die Schraube bereits am Ende eingedreht wurde, kann dieser Bereich noch ohne größere Schädigung von Knochenbereichen freigemacht werden, um die Ausdreh möglichkeit sicherzustellen.In order to enable a screwing out of a screw seat if necessary, chamfering 10 are preferably provided in the upper part of the screw head 4 , which, in interaction with pliers or the like, should only enable the screw to be turned in special cases. Since these surfaces are very far from the central axis, they do not need to be particularly pronounced, and since they are located in the upper part of the head, they can still be reached when the screw is almost completely screwed in. Even if the screw was already screwed in at the end, this area can still be cleared without major damage to bone areas to ensure that it can be removed.
Die Erfindung beschränkt sich in ihrer Ausführung nicht auf das vorstehend angegebene bevorzugte Ausführungsbei spiel. Vielmehr ist eine Anzahl von Varianten denkbar, welche von der dargestellten Lösung auch bei grundsätzlich anders gearteten Ausführungen Gebrauch machen.The invention is not restricted in its implementation to the preferred embodiment given above game. Rather, a number of variants are conceivable which of the solution shown also in principle make use of different types.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19863630863 DE3630863A1 (en) | 1986-09-08 | 1986-09-08 | Bone screw |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19863630863 DE3630863A1 (en) | 1986-09-08 | 1986-09-08 | Bone screw |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3630863A1 true DE3630863A1 (en) | 1988-03-17 |
Family
ID=6309325
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19863630863 Withdrawn DE3630863A1 (en) | 1986-09-08 | 1986-09-08 | Bone screw |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3630863A1 (en) |
Cited By (70)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0276153A2 (en) * | 1987-01-22 | 1988-07-27 | Ethicon, Inc. | Bone screw |
EP0419597A1 (en) * | 1989-02-08 | 1991-04-03 | Mitek Surgical Prod | Suture anchor and suture anchor installation tool. |
EP0442629A1 (en) * | 1990-02-13 | 1991-08-21 | Textron Inc. | Drive system for prosthetic fasteners |
US5062843A (en) * | 1990-02-07 | 1991-11-05 | Mahony Iii Thomas H | Interference fixation screw with integral instrumentation |
WO1994016636A1 (en) * | 1993-01-21 | 1994-08-04 | Huebner Randall J | Tapered bone screw with continuously varying pitch |
EP0654248A1 (en) * | 1993-11-23 | 1995-05-24 | Anton Prof. Dr. Härle | Load transfer member for osteosynthesis |
FR2723528A1 (en) * | 1994-08-09 | 1996-02-16 | Rech Ligamentaire Scrl Soc Civ | Implantable bone screw with threaded shank |
FR2723837A1 (en) * | 1994-08-29 | 1996-03-01 | Sofamor Danek Group Inc | THREADED TIGHTENING PLUG TO ENSURE A LINK BETWEEN TWO IMPLANTS OF A RACHIDIAN OSTEOSYNTHESIS OR OTHER INSTRUMENTATION. |
WO1996006576A1 (en) * | 1994-08-29 | 1996-03-07 | Societe De Fabrication De Materiel Orthopedique - Sofamor | Osteosynthesis instrument |
FR2734470A1 (en) * | 1995-05-24 | 1996-11-29 | Martin Jean Jacques | Stop for medullary nail |
DE19603410A1 (en) * | 1996-01-31 | 1997-08-14 | Kirsch Axel | Screw for insertion into a bone and unscrewing tool therefor |
FR2751523A1 (en) * | 1996-07-23 | 1998-01-30 | Euros Sa | Self tapping screw for fixing osteosynthesis plate |
US5871486A (en) * | 1993-01-21 | 1999-02-16 | Acumed, Inc. | Variable pitch bone screw |
US5964768A (en) * | 1993-01-21 | 1999-10-12 | Acumed, Inc. | Tapered bone screw with continuously varying pitch |
US6030162A (en) * | 1998-12-18 | 2000-02-29 | Acumed, Inc. | Axial tension screw |
US6056753A (en) * | 1998-07-13 | 2000-05-02 | Jackson; Roger P. | Set screw for use with osteosynthesis apparatus |
US6059786A (en) * | 1998-10-22 | 2000-05-09 | Jackson; Roger P. | Set screw for medical implants |
US6179841B1 (en) | 1997-01-06 | 2001-01-30 | Medtronic Sofamor Danek, Incorporated | Set screw for use with osteosynthesis apparatus |
US6193719B1 (en) | 1995-08-24 | 2001-02-27 | Sofamor S.N.C. | Threaded clamping plug for interconnecting two implants of a spinal osteosynthesis instrumentation or other implants |
US6224596B1 (en) | 1997-01-06 | 2001-05-01 | Roger P. Jackson | Set screw for use with osteosynthesis apparatus |
US6299615B1 (en) | 1993-01-21 | 2001-10-09 | Acumed, Inc. | System for fusing joints |
US6454768B1 (en) | 2000-12-05 | 2002-09-24 | Roger P. Jackson | Removable gripping set screw |
US6454772B1 (en) | 2000-12-08 | 2002-09-24 | Roger P. Jackson | Set screw for medical implant with gripping side slots |
US6468277B1 (en) | 2000-04-04 | 2002-10-22 | Ethicon, Inc. | Orthopedic screw and method |
EP1257219A2 (en) * | 2000-02-24 | 2002-11-20 | Stryker Instruments | Bioabsorbable plates, fasteners, tools and method of using same |
US6726687B2 (en) | 2000-12-08 | 2004-04-27 | Jackson Roger P | Closure plug for open-headed medical implant |
US6746484B1 (en) | 1997-08-26 | 2004-06-08 | Society De Fabrication De Materiel De Orthopedique, S.A. | Spinal implant |
US6984235B2 (en) | 1993-01-21 | 2006-01-10 | Acumed Llc | System for fusing joints |
US6997927B2 (en) | 2000-12-08 | 2006-02-14 | Jackson Roger P | closure for rod receiving orthopedic implant having a pair of spaced apertures for removal |
EP1719473A2 (en) * | 1998-12-23 | 2006-11-08 | BEGO Implant Systems GmbH & Co. KG | Tool for screwing in an assembly having a dental implant |
US7169183B2 (en) | 2000-03-14 | 2007-01-30 | Warsaw Orthopedic, Inc. | Vertebral implant for promoting arthrodesis of the spine |
ES2302464A1 (en) * | 2006-12-29 | 2008-07-01 | Ridelin, S.L. | A dynamometric screw with antiflexure fusible head |
US7651497B2 (en) | 1997-02-11 | 2010-01-26 | Warsaw Orthopedic, Inc. | Segmentable plate with locking element |
US7704255B2 (en) | 1997-02-11 | 2010-04-27 | Warsaw Orthopedic, Inc. | Threadless multi-lock anterior cervical plating system |
US8070786B2 (en) | 1993-01-21 | 2011-12-06 | Acumed Llc | System for fusing joints |
US8128667B2 (en) | 2002-09-06 | 2012-03-06 | Jackson Roger P | Anti-splay medical implant closure with multi-surface removal aperture |
US8137386B2 (en) | 2003-08-28 | 2012-03-20 | Jackson Roger P | Polyaxial bone screw apparatus |
US8257402B2 (en) | 2002-09-06 | 2012-09-04 | Jackson Roger P | Closure for rod receiving orthopedic implant having left handed thread removal |
US8273109B2 (en) | 2002-09-06 | 2012-09-25 | Jackson Roger P | Helical wound mechanically interlocking mating guide and advancement structure |
US8366753B2 (en) | 2003-06-18 | 2013-02-05 | Jackson Roger P | Polyaxial bone screw assembly with fixed retaining structure |
US8377100B2 (en) | 2000-12-08 | 2013-02-19 | Roger P. Jackson | Closure for open-headed medical implant |
US8398682B2 (en) | 2003-06-18 | 2013-03-19 | Roger P. Jackson | Polyaxial bone screw assembly |
US8454658B2 (en) | 2009-06-26 | 2013-06-04 | Aesculap Ag | Surgical bone anchoring device and spinal column fixation system |
US8814913B2 (en) | 2002-09-06 | 2014-08-26 | Roger P Jackson | Helical guide and advancement flange with break-off extensions |
US8852239B2 (en) | 2013-02-15 | 2014-10-07 | Roger P Jackson | Sagittal angle screw with integral shank and receiver |
US8870928B2 (en) | 2002-09-06 | 2014-10-28 | Roger P. Jackson | Helical guide and advancement flange with radially loaded lip |
US8911478B2 (en) | 2012-11-21 | 2014-12-16 | Roger P. Jackson | Splay control closure for open bone anchor |
US8926670B2 (en) | 2003-06-18 | 2015-01-06 | Roger P. Jackson | Polyaxial bone screw assembly |
US8926672B2 (en) | 2004-11-10 | 2015-01-06 | Roger P. Jackson | Splay control closure for open bone anchor |
US8998960B2 (en) | 2004-11-10 | 2015-04-07 | Roger P. Jackson | Polyaxial bone screw with helically wound capture connection |
US9161793B2 (en) | 1993-01-21 | 2015-10-20 | Acumed Llc | Axial tension screw |
US9308027B2 (en) | 2005-05-27 | 2016-04-12 | Roger P Jackson | Polyaxial bone screw with shank articulation pressure insert and method |
US9414863B2 (en) | 2005-02-22 | 2016-08-16 | Roger P. Jackson | Polyaxial bone screw with spherical capture, compression insert and alignment and retention structures |
US9451993B2 (en) | 2014-01-09 | 2016-09-27 | Roger P. Jackson | Bi-radial pop-on cervical bone anchor |
US9522021B2 (en) | 2004-11-23 | 2016-12-20 | Roger P. Jackson | Polyaxial bone anchor with retainer with notch for mono-axial motion |
US9566092B2 (en) | 2013-10-29 | 2017-02-14 | Roger P. Jackson | Cervical bone anchor with collet retainer and outer locking sleeve |
US9597119B2 (en) | 2014-06-04 | 2017-03-21 | Roger P. Jackson | Polyaxial bone anchor with polymer sleeve |
US9636146B2 (en) | 2012-01-10 | 2017-05-02 | Roger P. Jackson | Multi-start closures for open implants |
US9662143B2 (en) | 2004-02-27 | 2017-05-30 | Roger P Jackson | Dynamic fixation assemblies with inner core and outer coil-like member |
USRE46431E1 (en) | 2003-06-18 | 2017-06-13 | Roger P Jackson | Polyaxial bone anchor with helical capture connection, insert and dual locking assembly |
US9717533B2 (en) | 2013-12-12 | 2017-08-01 | Roger P. Jackson | Bone anchor closure pivot-splay control flange form guide and advancement structure |
US9717534B2 (en) | 2009-06-15 | 2017-08-01 | Roger P. Jackson | Polyaxial bone anchor with pop-on shank and friction fit retainer with low profile edge lock |
CN107835668A (en) * | 2015-05-11 | 2018-03-23 | 普罗维登斯医疗技术公司 | Method for being implanted into bone screws |
US10058354B2 (en) | 2013-01-28 | 2018-08-28 | Roger P. Jackson | Pivotal bone anchor assembly with frictional shank head seating surfaces |
US10064658B2 (en) | 2014-06-04 | 2018-09-04 | Roger P. Jackson | Polyaxial bone anchor with insert guides |
WO2019042974A3 (en) * | 2017-08-28 | 2019-06-06 | botiss biomaterials GmbH | Dental screw |
US10349983B2 (en) | 2003-05-22 | 2019-07-16 | Alphatec Spine, Inc. | Pivotal bone anchor assembly with biased bushing for pre-lock friction fit |
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RU2782108C2 (en) * | 2017-08-28 | 2022-10-21 | Ботисс Биоматириалз Гмбх | Bioresorbable screw |
-
1986
- 1986-09-08 DE DE19863630863 patent/DE3630863A1/en not_active Withdrawn
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US6299615B1 (en) | 1993-01-21 | 2001-10-09 | Acumed, Inc. | System for fusing joints |
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