Sawing gauge system

• US 5,049,149 A
• Filed: 12/12/1989
• Issued: 09/17/1991
• Est. Priority Date: 12/14/1988
• Status: Expired due to Fees

• Current Assignee: Schmidt Joachim Mohnweg
• Original Assignee: Schmidt Joachim Mohnweg
• Inventors: Schmidt, Joachim
• Primary Examiner(s): Hafer, Robert A.
• Assistant Examiner(s): Kenealy, David
• Application Number:
  US07/448,094
• Time in Patent Office: 644 Days
• Field of Search: 606/87, 606/89, 606/79, 606/102, 606/96, 606/82, 606/88
• US Class Current: 606/87
• CPC Class Codes: A61B 17/15 Guides therefor arrangements for guiding straight saw blades in general B23D51/025
• CPC Class Codes: A61B 17/151 for corrective osteotomy
• CPC Class Codes: B23D 51/025 of arrangements for guiding the saw blade

Abstract

A sawing gauge system to be used in case of intertrochantery accommodation osteotomies includes a first sawing gauge having an underside curved like a hollow cylinder for a face-to-face engagement with the bone surface of the femur shaft and a sawing opening oriented vertical to the axis of the femur shaft; and a second sawing gauge having an underside being curved like a hollow cylinder for a face-to-face engagement with the bone surface of the femur shaft and a sawing opening inclined towards the sawing opening in the first sawing gauge by an angle of 6° if the axes of the undersides of the first and second sawing gauges coincide.

Claims

1. A sawing gauge system to be used for intertrochantery accommodation osteotomies for removing a wedge-shaped section of bone, comprising

(a) a first sawing gauge having an underside;

said underside being curved like a hollow cylinder for a face-to-face engagement with the bone surface of a femur shaft;

(b) a first sawing opening provided in said first sawing gauge;

the first sawing opening being oriented perpendicularly to the axis of the femur shaft when said underside of said first sawing gauge is in face-to-face engagement with the bone surface of the femur shaft;

(c) a second sawing gauge having an underside;

said underside being curved like a hollow cylinder for a face-to-face engagement with the bone surface of the femur shaft;

(d) a second sawing opening provided in said second sawing gauge;

the second sawing opening being oriented to form an angle of 6°

with a perpendicular to the axis of the femur shaft when said second sawing gauge is in face-to-face contact with the bone surface of the femur shaft.

2. A sawing gauge system as defined in claim 1, wherein said undersides of the first and second sawing gauges have metal pins attached to them.

3. A sawing gauge system as defined in claim 1, wherein said first sawing gauge has a contact area with the bone surface of the femur shaft which is greater than the area of said first sawing opening as defined by the contact area with the bone surface of said first sawing gauge, and said first sawing opening is disposed adjacent the bone surface of the femur shaft when the first sawing gauge is in face-to-face engagement with the bone surface of a femur shaft.

4. A sawing gauge system as defined in claim 1, wherein said first sawing gauge comprises a handle.

5. A sawing gauge system as defined in claim 1, wherein said second sawing gauge comprises an angle plate having a shaft and a longitudinally adjustable slide part which can be attached to the shaft of said angle plate;

whereby

(a) the orientation of a contact area of said second sawing gauge and the plane of said angle plate are substantially perpendicular in relation to each other; and

(b) the orientation of the axis of said underside curved like a hollow cylinder of the second sawing gauge and the direction of elongation of said angle plate run approximately parallel to each other.

6. A sawing gauge system as defined in claim 5, further comprising a telescopic part and a longitudinally adjustable part disposed between said second sawing gauge and said angle plate, said telescopic part and said longitudinally adjustable part being movable relative to each other, wherein the distance between said angle plate and the axis of said underside curved like a hollow cylinder of the second sawing gauge can be set by either one of said telescopic part and said longitudinally adjustable part.

7. A sawing gauge system as defined in claim 5, wherein said angle plate comprises an element to lock said slide part.

8. A sawing gauge system as defined in claim 5, wherein said longitudinally adjustable part comprises an element to lock said slide part.

9. A sawing gauge system as defined in claim 5, wherein both said angle plate and said longitudinally adjustable part comprise an element to lock said slide part.

10. A sawing gauge system as defined in claim 7, wherein said element to lock said slide part comprises at least one set-screw.