Method of determining a contour of an anatomical structure and selecting an orthopaedic implant to replicate the anatomical structure
First Claim
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1. A method of selecting a placement of an implant for an orthopaedic surgery, the method comprising the steps of:
- identifying a region of an anatomical structure for replacement by said implant;
acquiring a plurality of data points from distinct locations on at least a portion of a surface of said region of said anatomical structure by physically contacting the anatomical structure with a device;
approximating a surface contour of said region of said anatomical structure solely using said plurality of data points;
selecting said implant from a library of implants, said implant being selected based on said approximation of said surface contour of said region of said anatomical structure; and
providing a proposed placement of said implant relative to said anatomical structure, wherein the step of selecting said implant from said library of implants includes the step of comparing a contour of each of a plurality of implants to said surface contour of said anatomical structure.
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Abstract
A computer assisted surgery (CAS) system and method for preparing an anatomical structure to receive an orthopaedic implant. The method generally involves the steps of determining a contour of the anatomical structure by using the CAS system to acquire a plurality of points on the anatomical structure and provide a best fit approximation of the anatomical structure based on the plurality of points, selecting an implant to replicate the anatomical structure, and preparing the anatomical structure to receive the implant.
85 Citations
30 Claims
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1. A method of selecting a placement of an implant for an orthopaedic surgery, the method comprising the steps of:
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identifying a region of an anatomical structure for replacement by said implant; acquiring a plurality of data points from distinct locations on at least a portion of a surface of said region of said anatomical structure by physically contacting the anatomical structure with a device; approximating a surface contour of said region of said anatomical structure solely using said plurality of data points; selecting said implant from a library of implants, said implant being selected based on said approximation of said surface contour of said region of said anatomical structure; and providing a proposed placement of said implant relative to said anatomical structure, wherein the step of selecting said implant from said library of implants includes the step of comparing a contour of each of a plurality of implants to said surface contour of said anatomical structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of selecting a placement of an implant for an orthopaedic surgery, the method comprising the steps of:
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identifying a region of an anatomical structure for replacement by said implant; physically contacting said region of said anatomic structure with a device at distinct locations on at least a portion of a surface of said region to obtain a plurality of data points; approximating a three-dimensional exterior contour of said region of said anatomical structure based solely on said plurality of data points; for each of a plurality of implants determining a fit between a three-dimensional exterior contour of said respective implant and said three-dimensional exterior contour of said anatomical structure; and receiving an indication of a selected implant from said plurality of implants. - View Dependent Claims (16, 17, 18)
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19. A method of placing an orthopaedic device, the method comprising the steps of:
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identifying an external surface region of an anatomical structure for placement of said orthopaedic device; physically contacting said external surface region at distinct locations on at least a portion of said external surface region to obtain a plurality of data points; determining an approximate contour of said external surface region of said anatomical structure based solely on said plurality of data points; and removing material from a portion of said orthopaedic device to generally match said approximate contour of said external surface region of said anatomical structure.
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20. A method of selecting a placement of an implant for an orthopaedic surgery, the method comprising the steps of:
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identifying a region of a current anatomical structure for replacement by said implant; acquiring a plurality of data points intraoperatively from distinct locations on at least a portion of said region of said current anatomical structure by physically contacting the region with a device; approximating a current contour of said region of said current anatomical structure based solely on said plurality of data points; comparing said current contour of said current anatomical structure to a library of contours of anatomical structures; selecting a first contour of a first anatomical structure from said library of contours of anatomical structures; and selecting a first implant for implantation in said current anatomical structure. - View Dependent Claims (21, 22, 23, 24, 25)
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26. A method of orthopaedic surgery for use with an anatomical structure, comprising the steps of:
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contacting said anatomical structure intraoperatively at distinct locations on at least a portion of a surface of said anatomical structure to acquire a plurality of data points from said anatomical structure, said distinct locations being chosen by a surgeon or other user and said contact being performed by a device that physically contacts said surface of said anatomical structure; determining an approximation of a three-dimensional exterior contour of said anatomical structure based solely on said plurality of data points; selecting a first orthopaedic implant from a plurality of orthopaedic implants for said anatomical structure based on said determined three-dimensional exterior contour of said anatomical structure; preparing said anatomical structure to receive said first orthopaedic implant; and coupling said first orthopaedic implant to said anatomical structure. - View Dependent Claims (27)
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28. A method of orthopaedic surgery for use with an anatomical structure, comprising the steps of:
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acquiring a plurality of data points intraoperatively from distinct locations on at least a portion of a surface of said anatomical structure by physically contacting said surface of said anatomical structure; using only said plurality of data points to calculate a best fit approximation of a three-dimensional exterior contour of said anatomical structure; selecting an orthopaedic implant substantially matching said three-dimensional exterior contour of said anatomical structure; preparing said anatomical structure to receive said orthopaedic implant; and implanting said orthopaedic implant in said anatomical structure. - View Dependent Claims (29, 30)
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Specification