US3905374A - Knee osteotomy blade - Google Patents

Knee osteotomy blade Download PDF

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Publication number
US3905374A
US3905374A US437174A US43717474A US3905374A US 3905374 A US3905374 A US 3905374A US 437174 A US437174 A US 437174A US 43717474 A US43717474 A US 43717474A US 3905374 A US3905374 A US 3905374A
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United States
Prior art keywords
series
cutting head
groove
teeth
hub
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Expired - Lifetime
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US437174A
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Roy Paul Winter
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American Sterilizer Co
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American Sterilizer Co
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Publication date
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Priority to US437174A priority Critical patent/US3905374A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
    • B27B5/29—Details; Component parts; Accessories
    • B27B5/30—Details; Component parts; Accessories for mounting or securing saw blades or saw spindles
    • B27B5/32—Devices for securing circular saw blades to the saw spindle
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/14—Surgical saws ; Accessories therefor
    • A61B17/142—Surgical saws ; Accessories therefor with reciprocating saw blades, e.g. with cutting edges at the distal end of the saw blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G13/00—Cutter blocks; Other rotary cutting tools
    • B27G13/12—Cutter blocks; Other rotary cutting tools for profile cutting
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/14—Surgical saws ; Accessories therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/687—By tool reciprocable along elongated edge
    • Y10T83/7045—Arcuately oscillating tool carried on single pivot
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/929—Tool or tool with support
    • Y10T83/9319—Toothed blade or tooth therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/929—Tool or tool with support
    • Y10T83/9319—Toothed blade or tooth therefor
    • Y10T83/935—Plural tooth groups

Definitions

  • This invention relates to power driven surgical tools and is particularly directed to an osteotomy saw blade for cutting a blind groove in the human femur for the polycentric type total knee operation.
  • the configuration of the knee blade greatly improves the cutting ability in a blind groove without binding or stalling.
  • a blind groove that is, a groove which has full depth up to its end shoulder
  • the operation takes place under moist conditions and it is difficult to remove the bone cuttings from the end of the groove while the cutting action is taking place.
  • the cutting head of the blade is carried on an arm which is oscillated in a small arc in a back and forth motion
  • cutting teeth are provided on the head in an arcuate series and a halftooth is formed at each end of the series.
  • the outer face of each half-tooth is shaped to prevent packing of bone cuttings at the end of the groove. All of the teeth in the series are set" in opposite directions to produce a groove wider than the thickness of the cutting head.
  • FIG. 1 is a side elevation showing a knee osteotomy blade embodying this invention and also showing an attachment for a rotary power tool, which attachment is used to oscillate the knee blade.
  • FIG. 2 is an enlargement'taken substantially on the Line 22 as shown in FIG. 1.
  • FIG. 3 is an enlargement of the cutting head and arcuate series of teeth, showing the half-tooth at each end of the series and also showing that alternate teeth in the series are set in opposite directions.
  • FIG. 4 is a sectional detail taken substantially on the Line 44 as shown on FIG. 3.
  • the osteotomy knee blade generally designated comprises a flat metal arm 11 which is tapered symmetrically from an enlarged hub 12 to a cutting head 13.
  • the cutting head 13 is wider than the adjacent portion of the arm 11, and it is provided with an arcuate series of cutting teeth 14.
  • the pointed ends of the teeth lie in an are having a radius R struck from the axis of the splined driver 18.
  • alternate teeth in the series are set" in opposite directions to produce a groove wider than the thickness of the cutting head 13.
  • a half-tooth 15 is formed at each end of the series.
  • the outer surfaces 16 of the half-tooth l5 define an acute angle a between them.
  • a driver 18 having external splines 19 is fixed to the arm 11 centrally of the hub 12 and projects from one side thereof.
  • This spline driver 18 is adapted to be received within a splined socket provided in one end 20 of an oscillator tool 21.
  • a rotary nut 22 on the other end of the oscillator tool operates a collet chuck to receive one end of a stationary part of a rotary power tool, not shown.
  • a mechanism within the device 21, not shown, converts the rotary movement of the power tool to oscillatory turning movement of the output socket 23.
  • the arm 11 oscillates in a plane about the axis of the spline driver 18 and it moves a few degrees of are sufficient to cause several teeth 14 to oscillate past the same spot in the groove being cut.
  • Bone cuttings do not pack at the blind ends of the groove because the teeth 15 at the ends of the series of teeth are only half-tooth in width. Moreover, the end surfaces 16 are undercut as shown by the angle a.
  • a blade of the type described comprising a metal arm extending from a hub at one end to a cutting head at the other end, a driver fixed to the hub for oscillating the arm in a plane about the axis of the driver, the cutting head having an arcuate series of teeth, to cut a groove, a half-tooth being provided at each end of said series, the outer surface of each half-tooth being undercut to prevent packing of cuttings at blind ends of the groove being cut.
  • a blade of the type described comprising a fiat metal arm tapering from a hub at one end to a cutting head at the other end, a spline driver fixed to the hub for oscillating the arm in a plane about the axis of the spline driver, the cutting head having an arcuate series of teeth, alternate teeth in the series being set in opposite directions to produce a groove wider than the thickness of the cutting head, a half-tooth being provided at each end of said series, the outer surface of each half-tooth being undercut to prevent packing of cuttings at blind ends of the groove being cut.

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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (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

A knee osteotomy blade comprises a flat metal arm tapered symmetrically from a hub at one end to a cutting head at the other. A spline driver fixed to the hub extends in one direction therefrom and serves to oscillate the arm about the axis of the spline driver. The cutting head has an arcuate series of teeth, a half-tooth being provided at each end of said series to facilitate cutting of a blind groove, alternate teeth in the series being set in opposite directions to produce a groove wider than the thickness of the cutting head.

Description

United States Patent Winter Sept. 16, 1975 [54] KNEE OSTEOTOMY BLADE 2,702,550 2/1955 Rowe 128/317 3,554,197 1/1971 Dobbie [75] Invent 214 fPaul wmte" Santa Barbara 3,678,934 7 1972 Warfield et a1...., 128/317 [73] Assignee: American Sterilizer Company, Erie, Primary n h nn g P P Attorney, Agent, or FirmLyon & Lyon F1 (1: 28,1 74 [22] Jan 9 57 ABSTRACT [21] Appl' 437l74 A knee osteotomy blade comprises a flat metal arm tapered symmetrically from a hub at one end to a cut- 52 US. Cl 128/317; 30/166 R; 83/782; g head at the other- A Spline driver fixed to the hub 3 335; 33/ 43 extends in one direction therefrom and serves to oscil- 511 im. (:1. A6lB 17/14; 3278 33/02 late the arm about the axis of the Spline driver- The [58] Field of Search 128/317; 30/166 R; 83/782, cutting head has an arcuate series of teeth, a half- 3 35 343 tooth being provided at each end of said series to facilitate cutting of a blind groove, alternate teeth in the 5 References Cited series being set in opposite directions to produce a groove wider than the thickness of the cutting head.
2 Claims, 4 Drawing Figures KNEE ()STEOTOMY BLADE BACKGROUND OF THE INVENTION This invention relates to power driven surgical tools and is particularly directed to an osteotomy saw blade for cutting a blind groove in the human femur for the polycentric type total knee operation. The configuration of the knee blade greatly improves the cutting ability in a blind groove without binding or stalling.
Cutting of a blind groove, that is, a groove which has full depth up to its end shoulder, is difficult to accomplish during an operation on the femur because the bone cuttings tend to pack at the end of the groove. The operation takes place under moist conditions and it is difficult to remove the bone cuttings from the end of the groove while the cutting action is taking place.
It is an important object of this invention to provide a novel form of osteotomy knee blade which overcomes this difficulty.
In accordance with this invention, the cutting head of the blade is carried on an arm which is oscillated in a small arc in a back and forth motion, cutting teeth are provided on the head in an arcuate series and a halftooth is formed at each end of the series. The outer face of each half-tooth is shaped to prevent packing of bone cuttings at the end of the groove. All of the teeth in the series are set" in opposite directions to produce a groove wider than the thickness of the cutting head.
Other and more detailed objects and advantages will appear hereinafter.
In the drawings FIG. 1 is a side elevation showing a knee osteotomy blade embodying this invention and also showing an attachment for a rotary power tool, which attachment is used to oscillate the knee blade.
FIG. 2 is an enlargement'taken substantially on the Line 22 as shown in FIG. 1.
FIG. 3 is an enlargement of the cutting head and arcuate series of teeth, showing the half-tooth at each end of the series and also showing that alternate teeth in the series are set in opposite directions.
FIG. 4 is a sectional detail taken substantially on the Line 44 as shown on FIG. 3.
Referring to the drawings, the osteotomy knee blade generally designated comprises a flat metal arm 11 which is tapered symmetrically from an enlarged hub 12 to a cutting head 13. The cutting head 13 is wider than the adjacent portion of the arm 11, and it is provided with an arcuate series of cutting teeth 14. The pointed ends of the teeth lie in an are having a radius R struck from the axis of the splined driver 18. As
shown in FIGS. 3 and 4, alternate teeth in the series are set" in opposite directions to produce a groove wider than the thickness of the cutting head 13. A half-tooth 15 is formed at each end of the series. The outer surfaces 16 of the half-tooth l5 define an acute angle a between them.
A driver 18 having external splines 19 is fixed to the arm 11 centrally of the hub 12 and projects from one side thereof. This spline driver 18 is adapted to be received within a splined socket provided in one end 20 of an oscillator tool 21. A rotary nut 22 on the other end of the oscillator tool operates a collet chuck to receive one end of a stationary part of a rotary power tool, not shown. A mechanism within the device 21, not shown, converts the rotary movement of the power tool to oscillatory turning movement of the output socket 23. The arm 11 oscillates in a plane about the axis of the spline driver 18 and it moves a few degrees of are sufficient to cause several teeth 14 to oscillate past the same spot in the groove being cut.
Bone cuttings do not pack at the blind ends of the groove because the teeth 15 at the ends of the series of teeth are only half-tooth in width. Moreover, the end surfaces 16 are undercut as shown by the angle a.
Having fully described my invention, it is to be understood that I am not to be limited to the details herein set forth but that my invention is of the full scope of the appended claims.
I claim:
1. A blade of the type described, comprising a metal arm extending from a hub at one end to a cutting head at the other end, a driver fixed to the hub for oscillating the arm in a plane about the axis of the driver, the cutting head having an arcuate series of teeth, to cut a groove, a half-tooth being provided at each end of said series, the outer surface of each half-tooth being undercut to prevent packing of cuttings at blind ends of the groove being cut.
2. A blade of the type described, comprising a fiat metal arm tapering from a hub at one end to a cutting head at the other end, a spline driver fixed to the hub for oscillating the arm in a plane about the axis of the spline driver, the cutting head having an arcuate series of teeth, alternate teeth in the series being set in opposite directions to produce a groove wider than the thickness of the cutting head, a half-tooth being provided at each end of said series, the outer surface of each half-tooth being undercut to prevent packing of cuttings at blind ends of the groove being cut.

Claims (2)

1. A blade of the type described, comprising a metal arm extending from a hub at one end to a cutting head at the other end, a driver fixed to the hub for oscillating the arm in a plane about the axis of the driver, the cutting head having an arcuate series of teeth, to cut a groove, a half-tooth being provided at each end of said series, the outer surface of each half-tooth being undercut to prevent packing of cuttings at blind ends of the groove being cut.
2. A blade of the type described, comprising a flat metal arm tapering from a hub at one end to a cutting head at the other end, a spline driver fixed to the hub for oscillating the arm in a plane about the axis of the spline driver, the cutting head having an arcuate series of teeth, alternate teeth in the series being set in opposite directions to produce a groove wider than the thickness of the cutting head, a half-tooth being provided at each end of said series, the outer surface of each half-tooth being undercut to prevent packing of cuttings at blind ends of the groove being cut.
US437174A 1974-01-28 1974-01-28 Knee osteotomy blade Expired - Lifetime US3905374A (en)

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US4252121A (en) * 1977-12-09 1981-02-24 Arnegger Richard E Separating device
US4409973A (en) * 1981-01-29 1983-10-18 Neufeld John A Method and apparatus for corrective osteotomy
US4513742A (en) * 1981-10-13 1985-04-30 Arnegger Richard E Saw blade with aperture
US4584999A (en) * 1981-07-14 1986-04-29 Arnegger Richard E Saw blade with shallow section
US4696308A (en) * 1986-04-09 1987-09-29 The Cleveland Clinic Foundation Core sampling apparatus
US5263972A (en) * 1991-01-11 1993-11-23 Stryker Corporation Surgical handpiece chuck and blade
US5306285A (en) * 1993-04-30 1994-04-26 Komet Medical Surgical saw blade
US5423845A (en) * 1991-03-07 1995-06-13 Biomet, Inc. Surgical saw blade
US5468247A (en) * 1993-05-26 1995-11-21 Stryker Corporation Saw blade for powered medical handpiece
US5489285A (en) * 1994-02-23 1996-02-06 Hall Surgical, Div. Of Zimmer, Inc. Surgical saw blade and clamp
US5507763A (en) * 1993-07-19 1996-04-16 Hall Surgical Surgical saw blade
US5554165A (en) * 1995-02-09 1996-09-10 Hall Surgical, Div. Of Zimmer, Inc. Surgical blade and hub
US5728118A (en) * 1995-03-29 1998-03-17 Linvatec Corporation Apparatus and method for harvesting a bone-tendon-bone ligament graft
US6022353A (en) * 1991-05-30 2000-02-08 Synasive Technology, Inc. Surgical saw blade
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KR20020024366A (en) * 2000-09-25 2002-03-30 김희영 Femoral trochlear scraper
US20020069727A1 (en) * 2000-11-23 2002-06-13 Roland Pollak Tool having a holder for mounting on a drive shaft
US20020104421A1 (en) * 2000-09-23 2002-08-08 Wurst Bert G. Saw blade
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US20040204731A1 (en) * 2002-11-12 2004-10-14 Stryker Instruments Surgical saw blade coupler
US20040243136A1 (en) * 2003-05-30 2004-12-02 Parag Gupta Dual cut surgical saw blade
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Patent Citations (4)

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US2455655A (en) * 1946-11-01 1948-12-07 Gay V Carroll Bone saw
US2702550A (en) * 1953-11-25 1955-02-22 Orthopedic Frame Company Surgical instrument
US3554197A (en) * 1967-08-11 1971-01-12 Desoutter Brothers Ltd Portable power-operated saw
US3678934A (en) * 1970-08-13 1972-07-25 Stryker Corp Power osteotome

Cited By (147)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4036236A (en) * 1975-10-06 1977-07-19 Stryker Corporation Surgical saw
US4252121A (en) * 1977-12-09 1981-02-24 Arnegger Richard E Separating device
US4409973A (en) * 1981-01-29 1983-10-18 Neufeld John A Method and apparatus for corrective osteotomy
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