METHOD AND APPARATUS FOR MANUFACTURING AN IMPLANT
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Abstract
An orthopedic device includes a femoral implant having a non-custom internal bone engagement surface. The femoral implant includes at least nine parameters adjusted preoperatively to correspond to a specific patient. The parameters can include patient-specific lengths, such as, for example, medial and lateral condyle widths and notch height, and patient-specific medial and lateral angles.
10 Citations
37 Claims
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1-18. -18. (canceled)
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19. An orthopedic device comprising:
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a femoral implant having a central plane and an internal bone engagement surface that includes an anterior planar surface, an anterior chamfer surface, a distal planar surface, a posterior chamfer surface, and a posterior planar surface, wherein the internal bone engagement surface is standardized so as to be independent of an anatomy of a specific patient'"'"'s joint and is one of a series of predetermined size increments for the femoral implant, each of the series of predetermined size increments varying by a set distance from others, the femoral implant further including a medial condyle width, a lateral condyle width and three medial angles and three lateral angles, each of the medial condyle width, the lateral condyle width, the three medial angles and the three lateral angles are configured to be patient-specific based on an image of the specific patient'"'"'s joint, wherein the medial condyle width, the lateral condyle width, the three medial angles and the three lateral angles are designed using computer modeling to have a shape dependent upon an anatomy of the specific patient, and wherein one of the three medial angles is defined by; an angle between the central plane and a line connecting medial-most points on an anterior edge of the distal planar surface and on a posterior edge of the distal planar surface, an angle between the central plane and a line connecting medial-most points on a distal edge of the anterior chamfer surface and the anterior edge of the distal planar surface, or an angle between the central plane and a line connecting medial-most points on the distal edge of the anterior chamfer surface and a proximal edge of the anterior planar surface. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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26. An orthopedic device comprising:
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a femoral implant having a central plane and an internal engagement surface that includes an anterior planar surface, an anterior chamfer surface, a distal planar surface, a posterior chamfer surface, and a posterior planar surface, wherein the internal bone engagement surface is standardized so as to be independent of an anatomy of a specific patient'"'"'s joint and is one of a series of predetermined size increments for the femoral implant, each of the series of predetermined size increments varying by a set distance from others, the femoral implant further including patient-specific lengths including a medial condyle width, a lateral condyle width, three patient specific medial angles and three patient-specific lateral angles, wherein each of the medial condyle width, the lateral condyle width, the three medial angles and the three lateral angles are configured to be patient-specific based on an image of the specific patient'"'"'s joint, wherein the medial condyle width, the lateral condyle width, the three medial angles and the three lateral angles are designed using computer modeling to have a shape dependent upon an anatomy of the specific patient, and wherein one of the three lateral angles is defined by; an angle between the central plane and a line connecting lateral-most points on the anterior edge of the distal planar surface and on the posterior edge of the distal planar surface, an angle between the central plane and a line connecting lateral-most points on the distal edge of the anterior chamfer surface and the anterior edge of the distal planar surface, or an angle between the central plane and a line connecting lateral-most points on the distal edge of the anterior chamfer surface and the proximal edge of the anterior planar surface. - View Dependent Claims (27, 28, 29, 30)
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31. An orthopedic device, comprising:
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a semi-custom femoral implant having a central plane, and including a bone engagement surface that is standardized so as to be independent of an anatomy of a specific patient'"'"'s joint and is one of a series of predetermined size increments for the femoral implant, each of the series of predetermined size increments varying by a set distance from others and an articulating surface, wherein the non-patient-specific bone engagement surface includes an anterior planar surface, an anterior chamfer surface, a distal planar surface, a posterior chamfer surface, and a posterior planar surface; the articulating surface includes a medial condyle and a lateral condyle separated by a notch, the notch being located along the central plane; and the articulating surface includes plurality of patient-specific features configured to be patient-specific based on an image of the specific patient'"'"'s joint and designed using computer modeling to have a shape dependent upon an anatomy of the specific patient including; a medial condyle width; a lateral condyle width; a first medial angle defined by an angle between the central plane and a line connecting medial-most points on an anterior edge of the distal planar surface and on a posterior edge of the distal planar surface; a second medial angle defined by an angle between the central plane and a line connecting medial-most points on a distal edge of the anterior chamfer surface and the anterior edge of the distal planar surface; a third medial angle defined by an angle between the central plane and a line connecting medial-most points on the distal edge of the anterior chamfer surface and a proximal edge of the anterior planar surface; a first lateral angle defined by an angle between the central plane and a line connecting lateral-most points on the anterior edge of the distal planar surface and on the posterior edge of the distal planar surface; a second lateral angle defined by an angle between the central plane and a line connecting lateral-most points on the distal edge of the anterior chamfer surface and the anterior edge of the distal planar surface; a third lateral angle defined by an angle between the central plane and a line connecting lateral-most points on the distal edge of the anterior chamfer surface and the proximal edge of the anterior planar surface. - View Dependent Claims (32, 33, 34, 35, 36, 37)
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Specification