METHOD AND APPARATUS FOR IMPLANTING A PROSTHETIC DEVICE
First Claim
1. Apparatus for preparing a seating surface of prescribed depth, contour configuration and area delineated by a prescribed peripheral boundary extending along the bone of a natural joint at which a prosthetic device is to be implanted, the bone having been provided with at least a partially prepared site for locating and seating a component part of the prosthetic device at the seating surface, the apparatus comprising:
- a depth, contouring and area guide block having longitudinally opposite first and second ends, laterally opposite first and second sides, an upper locator surface and a lower guide locating surface;
at least a portion of the upper locator surface having a profile contour configuration essentially matching a corresponding portion of the contour configuration of the seating surface;
a holding arrangement integral with the guide block for holding the guide block on the bone at the site with the guide block placed at a predetermined location and orientation relative to the bone;
a guide slot passing altitudinally through the guide block from the upper locator surface to the lower guide locating surface, the guide slot having a length, a laterally outer locator edge extending along a path geometrically similar to the peripheral boundary of the seating surface, a laterally inner edge and a lateral width between the outer locator edge and the inner edge; and
a cutting device for reception within the guide slot, the cutting device having a cutting axis for extending altitudinally when the cutting device is received within the guide slot, an axial cutting surface for rotation about the cutting axis, the axial cutting surface having a near end and a far end, a radial cutting surface transverse to the axial cutting surface at the far end, a radial bearing surface located at a predetermined axial distance from the radial cutting surface, and an axial bearing surface located axially between the radial bearing surface and the near end of the axial cutting surface;
the axial cutting surface having a diameter less than the lateral width of the guide slot, the axial bearing surface having a diameter less than the lateral width of the guide slot, and the radial bearing surface having a diameter greater than the lateral width of the guide slot, the diameters of the axial cutting surface, the axial bearing surface and the radial bearing surface having relative dimensions such that upon reception of the cutting device within the guide slot, the cutting device is capable of insertion axially into the guide slot in an altitudinal direction at any selected location along the length of the guide slot, the axial bearing surface follows the contour configuration of the outer locator edge of the guide slot to locate the axial cutting surface along the peripheral boundary of the seating surface while the radial bearing surface follows the upper locator surface, with the radial bearing surface overlying the outer locator edge and the inner edge of the guide slot to stabilize and locate the radial cutting surface at the prescribed depth of the seating surface.
2 Assignments
0 Petitions
Accused Products
Abstract
Method and apparatus for preparing a seating surface of prescribed depth, contour configuration and area delineated by a prescribed peripheral boundary extending along the bone of a natural joint at which a prosthetic device is to be implanted includes positioning a guide on the bone, the guide having a guide slot following a path geometrically similar to the peripheral boundary of the seating surface, inserting a cutting device altitudinally through the guide slot at any selected location along the path of the guide slot, and translating the cutting device along the guide slot to cut an outline groove in the bone coincident with the peripheral boundary of the seating surface. The guide then is removed from the bone, and portions of the bone lying within the area delineated by the outline groove are removed to establish the seating surface.
126 Citations
24 Claims
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1. Apparatus for preparing a seating surface of prescribed depth, contour configuration and area delineated by a prescribed peripheral boundary extending along the bone of a natural joint at which a prosthetic device is to be implanted, the bone having been provided with at least a partially prepared site for locating and seating a component part of the prosthetic device at the seating surface, the apparatus comprising:
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a depth, contouring and area guide block having longitudinally opposite first and second ends, laterally opposite first and second sides, an upper locator surface and a lower guide locating surface;
at least a portion of the upper locator surface having a profile contour configuration essentially matching a corresponding portion of the contour configuration of the seating surface;
a holding arrangement integral with the guide block for holding the guide block on the bone at the site with the guide block placed at a predetermined location and orientation relative to the bone;
a guide slot passing altitudinally through the guide block from the upper locator surface to the lower guide locating surface, the guide slot having a length, a laterally outer locator edge extending along a path geometrically similar to the peripheral boundary of the seating surface, a laterally inner edge and a lateral width between the outer locator edge and the inner edge; and
a cutting device for reception within the guide slot, the cutting device having a cutting axis for extending altitudinally when the cutting device is received within the guide slot, an axial cutting surface for rotation about the cutting axis, the axial cutting surface having a near end and a far end, a radial cutting surface transverse to the axial cutting surface at the far end, a radial bearing surface located at a predetermined axial distance from the radial cutting surface, and an axial bearing surface located axially between the radial bearing surface and the near end of the axial cutting surface;
the axial cutting surface having a diameter less than the lateral width of the guide slot, the axial bearing surface having a diameter less than the lateral width of the guide slot, and the radial bearing surface having a diameter greater than the lateral width of the guide slot, the diameters of the axial cutting surface, the axial bearing surface and the radial bearing surface having relative dimensions such that upon reception of the cutting device within the guide slot, the cutting device is capable of insertion axially into the guide slot in an altitudinal direction at any selected location along the length of the guide slot, the axial bearing surface follows the contour configuration of the outer locator edge of the guide slot to locate the axial cutting surface along the peripheral boundary of the seating surface while the radial bearing surface follows the upper locator surface, with the radial bearing surface overlying the outer locator edge and the inner edge of the guide slot to stabilize and locate the radial cutting surface at the prescribed depth of the seating surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An improvement in an apparatus for preparing a seating surface of prescribed depth, contour and area placed within a prescribed peripheral boundary extending along the bone of a natural joint at which a prosthetic device is to be implanted, the bone having been provided with at least a partially prepared site for locating and seating a component part of the prosthetic device at the seating surface, the apparatus including a depth, contouring and area guide for guiding a cutting device to be received within the guide, the cutting device having a cutting axis for extending altitudinally within the guide, an axial cutting surface for rotation about the cutting axis, the axial cutting surface having a first diameter, a near end and a far end, a radial cutting surface transverse to the axial cutting surface at the far end, a radial bearing surface having a second diameter and being located at a predetermined axial distance from the radial cutting surface, and an axial bearing surface having a third diameter and being located axially between the radial bearing surface and the near end of the axial cutting surface, the improvement comprising:
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a depth, contouring and area guide block having longitudinally opposite first and second ends, laterally opposite first and second sides, an upper locator surface and a lower guide locating surface;
at least a portion of the upper locator surface having a profile contour configuration essentially matching a corresponding portion of the contour configuration of the seating surface;
a holding arrangement integral with the guide block for holding the guide block on the bone at the site with the guide block placed at a predetermined location and orientation relative to the bone; and
a guide slot extending altitudinally through the guide block from the upper locator surface to the lower guide locating surface, the guide slot having a length, a laterally outer locator edge following a path geometrically similar to the peripheral boundary of the seating surface, a laterally inner edge and a lateral width between the outer locator edge and the inner edge;
the lateral width of the guide slot being greater than each of the first and third diameters and less than the second diameter with the first, second and third diameters having relative dimensions such that upon reception of the cutting device within the guide slot, the cutting device is capable of insertion axially into the guide slot in an altitudinal direction at any selected location along the length of the guide slot, the axial bearing surface follows the outer locator edge of the guide slot to locate the axial cutting surface along the peripheral boundary of the seating surface while the radial bearing surface follows the upper locator surface, with the radial bearing surface overlying the outer locator edge and the inner edge of the guide slot to stabilize and locate the radial cutting surface at the prescribed depth of the seating surface. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 20, 21)
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19. An improvement in an apparatus for preparing a seating surface of prescribed depth, contour and area delineated by a prescribed peripheral boundary extending along the bone of a natural joint at which a prosthetic device is to be implanted, the bone having been provided with at least a partially prepared site for locating and seating a component part of the prosthetic device at the seating surface, the apparatus including a depth, contouring and area guide block having longitudinally opposite first and second ends, laterally opposite first and second sides, an upper locator surface and a lower guide locating surface, at least a portion of the upper locator surface having a profile contour configuration essentially matching a corresponding portion of the contour configuration of the seating surface, a holding arrangement integral with the guide block for holding the guide block on the bone at the site with the guide block placed at a predetermined location and orientation relative to the bone, a guide slot extending altitudinally through the guide block from the upper locator surface to the lower guide locating surface, the guide slot having a length, a laterally outer locator edge following a path geometrically similar to the peripheral boundary of the seating surface, a laterally inner edge and a lateral width between the outer locator edge and the inner edge, the improvement comprising:
a cutting device for reception within the guide slot, the cutting device including a cutting axis for extending altitudinally when the cutting device is received within the guide slot;
an axial cutting surface for rotation about the cutting axis, the axial cutting surface having a near end and a far end;
a radial cutting surface transverse to the axial cutting surface at the far end;
a radial bearing surface located at a predetermined axial distance from the radial cutting surface; and
an axial bearing surface located axially between the radial bearing surface and the near end of the axial cutting surface;
the axial cutting surface having a diameter less than the lateral width of the guide slot, the axial bearing surface having a diameter less than the lateral width of the guide slot, and the radial bearing surface having a diameter greater than the lateral width of the guide slot, the diameters of the axial cutting surface, the axial bearing surface and the radial bearing surface having relative dimensions such that upon reception of the cutting device within the guide slot, the cutting device is capable of insertion axially into the guide slot in an altitudinal direction at any selected location along the length of the guide slot, the axial bearing surface follows the outer locator edge of the guide slot to locate the axial cutting surface along the peripheral boundary of the seating surface while the radial bearing surface follows the upper locator surface, with the radial bearing surface overlying the outer locator edge and the inner edge of the guide slot to stabilize and locate the radial cutting surface at the prescribed depth of the seating surface.
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22. A method of preparing a seating surface of prescribed depth, contour and area delineated by a prescribed peripheral boundary extending along the bone of a natural joint at which a prosthetic device is to be implanted, the bone having been provided with at least a partially prepared site for locating and seating a component part of the prosthetic device at the seating surface, the method comprising the steps of:
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positioning a depth, contouring and area guide on the bone at the site, the guide including a guide slot having a length following a path geometrically similar to the peripheral boundary of the seating surface, the length including longitudinal length portions spaced apart laterally;
engaging a cutting device with the guide by inserting the cutting device altitudinally through the guide slot at any selected location along the path of the guide slot;
translating the cutting device along the length of the guide slot to cut an outline groove in the bone coincident with the peripheral boundary of the seating surface such that the outline groove establishes an outline contiguous with the area of the seating surface;
removing the guide from the bone subsequent to translating the cutting device along the length of the guide slot; and
removing portions of the bone lying within the area contiguous with and delineated by the outline groove to establish the seating surface. - View Dependent Claims (23, 24)
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Specification