Method and apparatus for bony material removal
First Claim
1. An apparatus for cutting a bone comprising:
- pattern means including a planar contact face, the pattern means positionable alongside a surface of a bone to be cut;
cutting path means described in the pattern means, the cutting path means comprising at least two continuous guide surfaces for making non-coplanar surfaces in bone; and
cutting means coacting with the cutting path means the cutting means retained by the cutting path means and maintained in a position normal to the planar contact face of the pattern means while cutting said non-coplanar surfaces in said bone.
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Abstract
A method and apparatus is provided for cutting bone. In one embodiment, a femur is resected by means of pattern plates having a cutting path with at least two continuous, non-coplanar guide surfaces. The cutting path has a similar profile to the interior profile of a femoral prosthesis. The cutting path guides a reciprocating, oscillating, or rotating cutting tool along a path for removing material from some or all of the distal femur to accept a distal femoral prosthesis. The cutting tool can be a cylindrical milling bit, and can even have a curvilinear profile to cut bone such that it has a three dimensional profile in cross section. Pattern plates can also be used to cut or remove material from other bones.
365 Citations
15 Claims
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1. An apparatus for cutting a bone comprising:
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pattern means including a planar contact face, the pattern means positionable alongside a surface of a bone to be cut; cutting path means described in the pattern means, the cutting path means comprising at least two continuous guide surfaces for making non-coplanar surfaces in bone; and cutting means coacting with the cutting path means the cutting means retained by the cutting path means and maintained in a position normal to the planar contact face of the pattern means while cutting said non-coplanar surfaces in said bone. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for cutting a bone comprising the steps of:
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positioning pattern means alongside a surface of a bone to be cut, the pattern means including a planar contact face, the pattern means including a cutting path having at least two continuous guide surfaces for making non-coplanar surfaces in bone; affixing the pattern means to a bone; interconnecting a cutting means with the pattern means; retaining the cutting means normal to the planar contact face of the pattern means; and traversing the cutting means along the cutting path of the pattern means and maintaining the cutting means normal to the planar contact face of the pattern means to cut non-coplanar surfaces in a bone. - View Dependent Claims (12, 13, 14, 15)
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Specification