GB1300449A - Appliance for surgical implantation for bone fracture fixation - Google Patents

Appliance for surgical implantation for bone fracture fixation

Info

Publication number
GB1300449A
GB1300449A GB1382870A GB1382870A GB1300449A GB 1300449 A GB1300449 A GB 1300449A GB 1382870 A GB1382870 A GB 1382870A GB 1382870 A GB1382870 A GB 1382870A GB 1300449 A GB1300449 A GB 1300449A
Authority
GB
United Kingdom
Prior art keywords
washer
screw
pass
rollers
run
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.)
Expired
Application number
GB1382870A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Methodist Hospital
Original Assignee
Methodist Hospital
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to US80953669A priority Critical
Application filed by Methodist Hospital filed Critical Methodist Hospital
Publication of GB1300449A publication Critical patent/GB1300449A/en
Application status is Expired legal-status Critical

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical 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
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/80Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • A61B17/8033Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates having indirect contact with screw heads, or having contact with screw heads maintained with the aid of additional components, e.g. nuts, wedges or head covers
    • A61B17/8047Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates having indirect contact with screw heads, or having contact with screw heads maintained with the aid of additional components, e.g. nuts, wedges or head covers wherein the additional element surrounds the screw head in the plate hole
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS, WEDGES, JOINTS OR JOINTING
    • F16B43/00Washers or equivalent devices; Other devices for supporting bolt-heads or nuts
    • F16B43/001Washers or equivalent devices; Other devices for supporting bolt-heads or nuts for sealing or insulation

Abstract

1300449 Polytetrafluoroethylene compositions METHODIST HOSPITAL 23 March 1970 [24 March 1969] 13828/70 Heading C3P [Also in Divisions A5 and F2] An inert frusto-conical washer 32 transmits the load between a metal screw 16 and a metal plate 10 when the screw is screwed into a fractured bone the washer reducing corrosion of the plate and screw and preventing abrasion of load bearing surfaces of the plate and screw. The washer is made from polytetrafluoroethylene resin having suspended therein reinforcing material such as particulate metal, fibrous metal, glass or quartz, or single crystalline filaments, the reinforcing material forming 15 to 50% by volume of the washer. The washer material may be made by adding the polymer and reinforcing ingredients to an organic solvent in a high-speed, high-shear mixer and filtering the resultant slurry to produce a filter cake having less than about 20% by weight of solvent. The filter cake is pressed between platens at 500 to 3000 p.s.i. and 170‹ F. for 1 to 5 minutes, run through the nip of rollers at 200-220‹ F. to reduce its thickness in steps of 20 mils. to a thickness betwen 20 and 80 mils., and run through the rollers at 320‹ to 360‹ F. to reduce its thickness by half during each pass, the material being folded double after each pass and run through the rollers at 90 degrees to the previous pass in the following pass. The rolled material is sintered at 640‹ to 660‹ F. for from about 30 minutes to several hours, followed by extended drying at 300‹ to 400‹ F. if required.
GB1382870A 1969-03-24 1970-03-23 Appliance for surgical implantation for bone fracture fixation Expired GB1300449A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US80953669A true 1969-03-24 1969-03-24

Publications (1)

Publication Number Publication Date
GB1300449A true GB1300449A (en) 1972-12-20

Family

ID=25201561

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1382870A Expired GB1300449A (en) 1969-03-24 1970-03-23 Appliance for surgical implantation for bone fracture fixation

Country Status (4)

Country Link
CA (1) CA954402A (en)
CH (1) CH514328A (en)
DE (1) DE2013968A1 (en)
GB (1) GB1300449A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0723764A1 (en) * 1995-01-27 1996-07-31 Robert J. Medoff Pin plate
GB2305483A (en) * 1995-09-22 1997-04-09 Terray Corp Hemispherical washer for use with a bone screw
US6053682A (en) * 1996-11-07 2000-04-25 Robert Bosch Gmbh Fastening screw with a bevel and deformable coating for securing a body place
US6077266A (en) * 1999-01-15 2000-06-20 Medoff; Robert J. Method of enabling bone screws to be installed at an angle in underlying bone
WO2004049962A1 (en) * 2002-12-02 2004-06-17 Mathys Medizinaltechnik Ag Implant for fixing bones
FR2994380A1 (en) * 2012-08-13 2014-02-14 Biotech Ortho Coating plate of bone fragments and methods of making such plate.

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0355035B1 (en) * 1987-11-03 1994-05-18 SYNTHES AG, Chur Bone plate with conical holes
DE3942326A1 (en) * 1989-12-21 1991-06-27 Haerle Anton Screw as osteosynthesis
FR2706763B1 (en) * 1993-06-25 1995-08-11 Implants Ind Sa
DE19548395A1 (en) * 1995-12-22 1997-09-18 Leibinger Gmbh osteosynthesis

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0723764A1 (en) * 1995-01-27 1996-07-31 Robert J. Medoff Pin plate
WO1996022743A1 (en) * 1995-01-27 1996-08-01 Collux Ab Pin plate
US5931839A (en) * 1995-01-27 1999-08-03 Medoff; Robert J. Pin plate for fixation of bone fractures
GB2305483A (en) * 1995-09-22 1997-04-09 Terray Corp Hemispherical washer for use with a bone screw
GB2305483B (en) * 1995-09-22 1999-09-15 Terray Corp Washer for use with a bone screw
US6053682A (en) * 1996-11-07 2000-04-25 Robert Bosch Gmbh Fastening screw with a bevel and deformable coating for securing a body place
US6077266A (en) * 1999-01-15 2000-06-20 Medoff; Robert J. Method of enabling bone screws to be installed at an angle in underlying bone
WO2004049962A1 (en) * 2002-12-02 2004-06-17 Mathys Medizinaltechnik Ag Implant for fixing bones
AU2002351649B2 (en) * 2002-12-02 2006-08-24 Synthes Gmbh Implant for fixing bones
US7641676B2 (en) 2002-12-02 2010-01-05 Synthes Usa, Llc Implant for fixing bones
CN1694653B (en) 2002-12-02 2010-07-14 斯恩蒂斯有限公司 Implant for fixing bones
FR2994380A1 (en) * 2012-08-13 2014-02-14 Biotech Ortho Coating plate of bone fragments and methods of making such plate.

Also Published As

Publication number Publication date
DE2013968A1 (en) 1970-10-08
CA954402A (en) 1974-09-10
CA954402A1 (en)
CH514328A (en) 1971-10-31

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee