US Patent No: 5,120,171

Number of patents in Portfolio can not be more than 2000

Bone screw with improved threads

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ATTORNEY / AGENT: (SPONSORED)
 

Importance

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Abstract

A bone screw having a helical thread that gradually increases in thickness from the tip to the head of the screw. The thin thread at the tip of the screw can be inserted into a bone with minimal tearing or cracking of the bone. The thicker treads ascending form the tip to the head of the screw displaces bone against the superior (top) thread surfaces. This displacement of bone increases the screw's resistance to being pulled-out of the bone. The thicker core just below the screw head increases the screw's ability to withstand compressive and distractive loads. The core is thickest just below the head because it is at that point on the screw that the fulcrum loads are greatest.

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First Claim

Related Publications

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Patent Owner(s)

Patent OwnerAddressTotal Patents
STUART SURGICALGREENSBURG, PA2
YOUNGWOOD MEDICAL SPECIALTIES, INC.YOUNGWOOD, PA2

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Lasner, Jeffrey Purchase, NY 10 364

Cited Art

Patent Info (Count) # Cites Year
 
ZIMMER TECHNOLOGY, INC. (2)
4,640,271 Bone screw 101 1985
4,870,957 Ligament anchor system 312 1988
 
EDWARDS, CHARLES C. (1)
4,569,338 Sacral fixation device 61 1984
 
NOVEX TALALMANYFEJLESZTO ES ERTEKESITO KULKERESKEDELMI RT. (1)
4,261,351 Medullary cavity pin 22 1979
 
REHAU AG & CO. (1)
4,756,653 Fastening element for securing packing sheets 14 1983
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (2)
4,463,753 Compression bone screw 200 1981
4,791,918 Femoral-neck implant 32 1986

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
X-SPINE SYSTEMS, INC. (13)
7,717,943 Capless multiaxial screw and spinal fixation assembly and method 5 2005
7,662,172 Pedicle screw systems and methods of assembling/installing the same 39 2005
7,604,655 Bone fixation system and method for using the same 11 2006
7,686,835 Pedicle screw system with provisional locking aspects 10 2006
8,092,504 Pedicle screw systems and methods of assembling/installing the same 2 2007
8,012,185 Pedicle screw systems and methods of assembling/installing the same 2 2007
8,029,539 Offset multiaxial or polyaxial screw, system and assembly 1 2007
8,097,025 Pedicle screw system configured to receive a straight or curved rod 1 2008
8,147,522 Bone fixation method 0 2009
8,142,481 Pedicle screw systems and methods of assembling/installing the same 0 2010
8,016,866 Pedicle screw system with provisional locking aspects 3 2010
8,066,745 Capless multiaxial screw and spinal fixation assembly and method 1 2010
8,382,806 Capless multiaxial screw and spinal fixation assembly and method 0 2011
 
DEPUY SPINE, INC. (12)
7,066,938 Snap-on spinal rod connector 19 2002
7,645,294 Head-to-head connector spinal fixation system 16 2004
7,717,938 Dual rod cross connectors and inserter tools 3 2004
7,951,175 Instruments and methods for manipulating a vertebra 2 2005
7,879,074 Posterior dynamic stabilization systems and methods 28 2005
7,717,939 Rod attachment for head to head cross connector 28 2005
7,722,651 Adjustable bone screw assembly 7 2005
8,007,516 Instruments and methods for manipulating vertebra 0 2007
7,951,168 Instruments and methods for manipulating vertebra 0 2007
7,967,845 Head-to-head connector spinal fixation system 3 2009
8,192,471 Rod attachment for head to head cross connector 2 2010
7,951,174 Adjustable bone screw assembly 1 2010
 
ACUMED LLC (9)
5,562,672 Tapered bone screw with continuously varying pitch 66 1994
5,871,486 Variable pitch bone screw 76 1997
5,868,789 Removable suture anchor apparatus 124 1997
5,964,768 Tapered bone screw with continuously varying pitch 53 1998
6,030,162 Axial tension screw 152 1998
6,299,615 System for fusing joints 56 1999
6,984,235 System for fusing joints 8 2002
7,235,079 Composite bone fasteners 13 2004
8,070,786 System for fusing joints 0 2006
 
THEKEN SPINE, LLC (9)
7,306,603 Device and method for percutaneous placement of lumbar pedicle screws and connecting rods 118 2002
7,588,588 System and method for stabilizing of internal structures 54 2003
7,967,826 Connector transfer tool for internal structure stabilization systems 1 2004
7,905,907 Internal structure stabilization system for spanning three or more structures 4 2004
7,618,442 Implant assembly and method for use in an internal structure stabilization system 17 2004
7,588,575 Extension for use with stabilization systems for internal structures 51 2004
7,569,061 Off-axis anchor guidance system 10 2004
8,382,802 Systems, methods and devices for placement of bone anchors and connectors 0 2006
8,202,304 Methods and systems for performing spinal surgery 0 2006
 
SYNTHES USA, LLC (8)
5,403,136 Threaded fastener especially for orthopaedic purposes 72 1993
6,585,740 Bone screw 118 2001
6,835,197 Bone fixation system 7 2001
7,306,600 Bone fixation system 9 2004
7,182,765 Bone fixation system 11 2004
7,892,234 Intramedullary nail 4 2004
8,066,706 Surgical nail 0 2004
8,221,419 Intramedullary nail 0 2006
 
BIOMET SPORTS MEDICINE, LLC (3)
7,713,285 Method and apparatus for suture anchors with a vertical eyelet 3 2003
7,780,701 Suture anchor 4 2003
8,361,114 Method and apparatus for suture anchors with a vertical eyelet 0 2010
 
CROSS MEDICAL PRODUCTS, LLC (3)
5,466,237 Variable locking stabilizer anchor seat and screw 330 1993
5,474,555 Spinal implant system 410 1994
5,624,442 Transverse link for use with a spinal implant system 122 1995
 
DEPUY INTERNATIONAL LIMITED (3)
8,348,952 System and method for cooling a spinal correction device comprising a shape memory material for corrective spinal surgery 0 2006
8,414,614 Implant kit for supporting a spinal column 0 2006
8,425,563 Spinal rod support kit 0 2007
 
DEPUY SYNTHES PRODUCTS, LLC (3)
8,361,117 Spinal cross connectors 0 2006
8,372,119 Dual rod cross connectors and inserter tools 0 2008
8,430,914 Assembly for orthopaedic surgery 0 2008
 
WARSAW ORTHOPEDIC, INC. (3)
8,075,604 Multi-thread bone screw and method 0 2006
7,699,203 Variable angle surgical staple inserter 1 2006
8,128,671 Variable flank bone screw 1 2007
 
DEPUY MITEK, INC. (2)
6,468,277 Orthopedic screw and method 44 2000
6,527,777 Device for repairing a soft-tissue tear and method 36 2001
 
HDL THREADFORM, LLC (2)
6,375,657 Bonescrew 25 2000
6,551,323 Method of making a bonescrew 40 2001
 
MEDICAL DEVICE ADVISORY DEVELOPMENT GROUP, LLC. (2)
6,770,075 Spinal fixation apparatus with enhanced axial support and methods for use 86 2002
7,314,467 Multi selective axis spinal fixation system 23 2003
 
PIONEER SURGICAL TECHNOLOGY, INC. (2)
7,828,829 Low top bone fixation system and method for using the same 6 2007
8,398,683 Rod coupling assembly and methods for bone fixation 0 2008
 
DEPUY ACE MEDICAL COMPANY (1)
5,334,204 Fixation screw 52 1992
 
DEPUY ACROMED, INC. (1)
6,761,721 Transverse connector 31 2002
 
DEPUY MITEK (1)
7,578,836 Orthopedic screw and method 6 2006
 
DEPUY ORTHOPAEDICS, INC. (1)
6,432,108 Transverse connector 46 2000
 
EBI, LLC (1)
5,496,321 Rod anchor seat having a sliding interlocking rod connector 232 1994
 
ETHICON, INC. (1)
6,989,014 Orthopedic screw and method 10 2002
 
LANX, LLC (1)
7,766,945 Screw and rod fixation system 27 2004
 
LINVATEC CORPORATION (1)
5,443,509 Interference bone-fixation screw with multiple interleaved threads 86 1992
 
ORTHOPAEDIC BIOSYSTEMS LTD., INC. (1)
5,522,843 Apparatus for attaching soft tissue to bone 106 1994
 
RHAUSLER, INC. (1)
7,736,380 Cervical plate system 3 2005
 
SARL, DEPUY SPINE (1)
7,951,172 Constrained motion bone screw assembly 2 2005
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (6)
8,206,454 Self-cutting screw-in element 0 2005
8,419,779 Systematic displacement bone screw 0 2009
D630326 Systematic displacement screw 0 2009
D630327 Systematic displacement screw 0 2009
D626230 Systematic displacement screw 0 2009
D625817 Systematic displacement screw 0 2009