US5147364A — Osteotomy saw/file, cutting guide and method

Claim 1

Independent Claim 169 words

An osteotomy saw/file comprising: a semicircularly curved blade of uniform thickness having first and second faces on opposite sides thereof and first and second longitudinal edges between said faces, at least one of said faces comprising a file having teeth for filing a kerf in a bone in a direction transverse to said face, said first edge having teeth formed thereon for cutting edgewise through a bone to make an arcuate cut having a curvature corresponding to that of said blade, and a shank for engagement by a drive motor to apply reciprocating motion to said blade, the described configuration of said blade thereby enabling an arcuate osteotomy including both a correction cut and an arcuate cut to be performed without removing the blade from a bone, the blade filing a correction cut as a kerf when the blade is advanced in a bone in a direction transverse to said one face and sawing an arcuate cut when advanced circumferentially in a bone along the circumference of said blade.

Claim 2

Dependent Claim 169 words

An osteotomy saw/file comprising: a semicircularly curved blade of uniform thickness having first and second faces on opposite sides thereof and first and second longitudinal edges between said faces, at least one of said faces comprising a file having teeth for filing a kerf in a bone in a direction transverse to said face, said first edge having teeth formed thereon for cutting edgewise through a bone to make an arcuate cut having a curvature corresponding to that of said blade, and a shank for engagement by a drive motor to apply reciprocating motion to said blade, the described configuration of said blade thereby enabling an arcuate osteotomy including both a correction cut and an arcuate cut to be performed without removing the blade from a bone, the blade filing a correction cut as a kerf when the blade is advanced in a bone in a direction transverse to said one face and sawing an arcuate cut when advanced circumferentially in a bone along the circumference of said blade.

Claim 3

Dependent Claim 28 words

An osteotomy saw/file in accordance with claim 1 wherein, said blade has a semi-circular cross sectional shape, said first face being concave and said second face being convex.

Claim 4

Dependent Claim 18 words

An osteotomy saw/file in accordance with claim 2 wherein said first face is concave and comprises said file.

Claim 5

Dependent Claim 18 words

An osteotomy saw/file in accordance with claim 2 wherein said second face is convex and comprises said file.

Claim 6

Dependent Claim 22 words

An osteotomy saw/file in accordance with claim 1 wherein said shank is elongated and has an axis parallel to said first edge.

Claim 7

Dependent Claim 21 words

An osteotomy saw/file in accordance with claim 1 wherein said shank is centered with respect to said first and second edges.

Claim 8

Dependent Claim 91 words

An osteotomy file for filing a transversely tapered correction in a bone, said file having a blade with first and second faces on opposite sides thereof, said faces being angulated to one another, each said face comprising a film having teeth for filing a bone, the angulation of said faces defining a taper for filing a correction in an osteotomy said blade having no taper in its longitudinal direction thereby being adapted to cut on both said faces simultaneously, to form a correction slot which is tapered transversely but not longitudinally.

Claim 9

Dependent Claim 91 words

An osteotomy file for filing a transversely tapered correction in a bone, said file having a blade with first and second faces on opposite sides thereof, said faces being angulated to one another, each said face comprising a film having teeth for filing a bone, the angulation of said faces defining a taper for filing a correction in an osteotomy said blade having no taper in its longitudinal direction thereby being adapted to cut on both said faces simultaneously, to form a correction slot which is tapered transversely but not longitudinally.

Claim 10

Dependent Claim 117 words

An osteotomy instrument comprising a bone file and a guide for controlling the path of filing movement of said file in a bone, said file comprising, a blade having first and second faces on opposite sides thereof and first and second longitudinal edges between said faces, at least one of said faces having teeth for filing a kerf in a direction transverse to said face when reciprocated, and a shank for engagement by drive means to apply reciprocating motion to said blade; said guide comprising, means mountable to a bone to guide said file for filing a kerf in the form of a slot of uniform width and extending in a direction transverse to said one face.

Claim 11

Dependent Claim 117 words

An osteotomy instrument comprising a bone file and a guide for controlling the path of filing movement of said file in a bone, said file comprising, a blade having first and second faces on opposite sides thereof and first and second longitudinal edges between said faces, at least one of said faces having teeth for filing a kerf in a direction transverse to said face when reciprocated, and a shank for engagement by drive means to apply reciprocating motion to said blade; said guide comprising, means mountable to a bone to guide said file for filing a kerf in the form of a slot of uniform width and extending in a direction transverse to said one face.

Claim 12

Dependent Claim 156 words

An osteotomy instrument comprising a bone file and a guide for controlling the path of filing movement of said file in a bone, said file comprising, a blade having first and second faces on opposite sides thereof and first and second longitudinal edges between said faces, at least one of said faces having teeth for filing a kerf in a direction transverse to said face when reciprocated, and a shank for engagement by drive means to apply reciprocating motion to said blade; said guide comprising, means mountable to a bone to guide said file for filing a kerf extending in a direction transverse to said one face, a slide mounted for movement along and guided by said arm, said slide having means for holding said blade perpendicular to said slide while said file is reciprocated, said file filing a kerf in said bone when said slide is moved along said arm as said file is reciprocated.

Claim 13

Dependent Claim 156 words

An osteotomy instrument comprising a bone file and a guide for controlling the path of filing movement of said file in a bone, said file comprising, a blade having first and second faces on opposite sides thereof and first and second longitudinal edges between said faces, at least one of said faces having teeth for filing a kerf in a direction transverse to said face when reciprocated, and a shank for engagement by drive means to apply reciprocating motion to said blade; said guide comprising, means mountable to a bone to guide said file for filing a kerf extending in a direction transverse to said one face, a slide mounted for movement along and guided by said arm, said slide having means for holding said blade perpendicular to said slide while said file is reciprocated, said file filing a kerf in said bone when said slide is moved along said arm as said file is reciprocated.

Claim 14

Dependent Claim 25 words

An osteotomy instrument in accordance with claim 9 wherein said arm has a slot and said slide is slidable along and guided by said slot.

Claim 15

Dependent Claim 31 words

An osteotomy instrument in accordance with claim 9 further including means for adjusting the angle of said blade with respect to said slide, thereby to change the width of said kerf.

Claim 16

Dependent Claim 27 words

An osteotomy instrument in accordance with claim 9 further wherein said arm has pivot means securable to a bone, said arm being swingable about said pivot means.

Claim 17

Dependent Claim 45 words

An osteotomy instrument in accordance with claim 12 wherein at least one of said longitudinal edges of said file has teeth formed thereon for cutting a kerf edgewise through a bone when said file is reciprocated and said arm is swung about said pivot means.

Claim 18

Dependent Claim 115 words

Apparatus for performing arcuate osteotomies comprising a cutting guide and a bone cutting implement, said cutting guide comprising, an arm, a pivot pin extending from said arm and securable into a bone, said arm being swingable about said pivot pin, a slide mounted for guided movement along said arm, means on said slide for holding said cutting implement for cutting a kerf perpendicular to said arm, said slide being movable inwardly and outwardly along said arm to guide said cutting implement, said arm also presenting a stop which arrests inward movement of said slide so that when said arm is rotated about said pin, said cutting implement is moved along an arc of constant radius.

Claim 19

Dependent Claim 115 words

Apparatus for performing arcuate osteotomies comprising a cutting guide and a bone cutting implement, said cutting guide comprising, an arm, a pivot pin extending from said arm and securable into a bone, said arm being swingable about said pivot pin, a slide mounted for guided movement along said arm, means on said slide for holding said cutting implement for cutting a kerf perpendicular to said arm, said slide being movable inwardly and outwardly along said arm to guide said cutting implement, said arm also presenting a stop which arrests inward movement of said slide so that when said arm is rotated about said pin, said cutting implement is moved along an arc of constant radius.

Claim 20

Dependent Claim 61 words

The apparatus of claim 14 wherein said guide further includes means for limiting the extent of rotation of said arm about said pivot pin, thereby to guide said cutting implement to form a tapered correction by moving said slide along said arm along first and second angular paths corresponding to the limits of rotation of said arm about said pivot pin.

Claim 21

Dependent Claim 50 words

The apparatus of claim 14 wherein said rotation limiting means is a transverse slot in said arm and a stop extending through said slot and into a bone, said arm being swingable about said pivot pin between angular positions at which said stop arrests the opposite ends of said slot.

Claim 22

Dependent Claim 11 words

The apparatus of claim 14 wherein said cutter is a file.

Claim 23

Dependent Claim 12 words

The apparatus of claim 14 wherein said cutter is a rotary burr.

Claim 24

Dependent Claim 12 words

The apparatus of claim 14 wherein said cutter is a reciprocating saw.

Claim 25

Dependent Claim 147 words

In the method of performing an arcuate osteotomy wherein an arcuate cut is made with a cutting implement across part of the width of a bone and a tapered correction is cut across the rest of the width of the bone, thereby severing the bone into two segments which can be rotated about the arcuate cut to close the correction and thereby straighten the bone, the improvement comprising, mounting a cutting guide for rotation about a pivot pin fixed to said bone, said guide presenting a guide track which extends outwardly from said pivot, moving a rotary burr cutter along said guide track to cut one side of said correction, swinging said guide about said pivot to a second angular position corresponding to a desired taper for the correction, and moving said rotary burr cutter along said guide track to cut a second side of said correction.

Claim 26

Dependent Claim 147 words

In the method of performing an arcuate osteotomy wherein an arcuate cut is made with a cutting implement across part of the width of a bone and a tapered correction is cut across the rest of the width of the bone, thereby severing the bone into two segments which can be rotated about the arcuate cut to close the correction and thereby straighten the bone, the improvement comprising, mounting a cutting guide for rotation about a pivot pin fixed to said bone, said guide presenting a guide track which extends outwardly from said pivot, moving a rotary burr cutter along said guide track to cut one side of said correction, swinging said guide about said pivot to a second angular position corresponding to a desired taper for the correction, and moving said rotary burr cutter along said guide track to cut a second side of said correction.

Claim 27

Dependent Claim 35 words

The improvement of claim 20 wherein said rotary burr cutter is held at a given position along said guide track as said guide is swung about said pivot pin thereby to cut said arcuate cut.

Claim 28

Dependent Claim 88 words

In a method of performing an arcuate osteotomy wherein an arcuate cut is sawn across part of the width of a bone and a correction extends across the rest of the width of the bone to an opposite side thereby severing the bone into two segments, and wherein the segments are then rotated about said arcuate cut and set in a desired new alignment, the improvement comprising, making said correction by filing a wedge-shaped kerf which extends between said arcuate cut and said opposite side of the bone.

Claim 29

Dependent Claim 88 words

In a method of performing an arcuate osteotomy wherein an arcuate cut is sawn across part of the width of a bone and a correction extends across the rest of the width of the bone to an opposite side thereby severing the bone into two segments, and wherein the segments are then rotated about said arcuate cut and set in a desired new alignment, the improvement comprising, making said correction by filing a wedge-shaped kerf which extends between said arcuate cut and said opposite side of the bone.

Claim 30

Dependent Claim 27 words

The improvement of claim 22 wherein said correction is made by filing said kerf with a curved blade having a file cut on a curved face thereof.

Claim 31

Dependent Claim 34 words

The improvement of claim 22 wherein said correction is filed inwardly from said opposite side of the bone, said correction being made with a blade having a concave face with a file cut thereon.

Claim 32

Dependent Claim 34 words

The improvement of claim 22 wherein said arcuate cut is made by cutting with an edge of a curved blade, and said correction is cut by filing with a curved face of said blade.

Claim 33

Dependent Claim 22 words

The improvement of claim 25 wherein said blade is moved in a direction transverse to said curved face to file said correction.

Claim 34

Dependent Claim 39 words

The improvement of claim 25 wherein said correction is made before said arcuate cut, by filing it with a semicircularly curved blade having a file on a concave face thereof, and said arcuate cut is made from said correction.

Claim 35

Dependent Claim 59 words

The improvement of claim 23 wherein the path of said blade is guided by a guide fixed to said bone, said arcuate cut is made by swinging said guide around a pin fixed to said bone, said blade moving along a semicircular path, said blade having a radius of curvature equal to the radius of curvature of said path.

Claim 36

Dependent Claim 23 words

The improvement of claim 28 further wherein said blade is moved along a transverse path defined by said guide to make said correction.

Claim 37

Dependent Claim 24 words

The improvement of claim 29 wherein said guide is swung between angular movement limiting stops to guide said blade to cut a wedge-shaped correction.

Claim 38

Dependent Claim 14 words

The improvement of claim 22 wherein said kerf is wider than said arcuate cut.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1995-09-15	1996-03-16	1996-09-15	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1999-09-15	2000-03-16	2000-09-15	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2003-09-15	2004-03-16	2004-09-15	$7700.00	Window Closed / Lapsed

Osteotomy saw/file, cutting guide and method

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