Computer-aided system for revision total hip replacement surgery

• US 5,769,092 A
• Filed: 02/22/1996
• Issued: 06/23/1998
• Est. Priority Date: 02/22/1996
• Status: Expired due to Term

• Current Assignee: Curexo Technology Corporation
• Original Assignee: Integrated Surgical Systems, Inc.
• Inventors: Williamson, Willie Jr.
• Primary Examiner(s): Lewis, Aaron J.
• Assistant Examiner(s): O'Hara, Kelly
• Application Number:
  US08/606,989
• Time in Patent Office: 852 Days
• Field of Search: 128/898, 128/922, 128/923, 364/413.13, 623/16, 623/66, 600/425, 600/427
• US Class Current: 128/898
• CPC Class Codes: A61B 17/8847 for removing cement from a bone cavity using surgical bone chisels, drills, mills, rasps, reamers or scrapers A61B17/16; using laser A61B18/20; using ultrasonic surgical instruments A61N7/00
• CPC Class Codes: A61B 2090/3762 using computed tomography systems [CT]
• CPC Class Codes: A61B 34/10 Computer-aided planning, simulation or modelling of surgical operations
• CPC Class Codes: A61B 34/30 Surgical robots
• CPC Class Codes: A61F 2/30942 for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques
• CPC Class Codes: A61F 2/3662 Femoral shafts
• CPC Class Codes: A61F 2/4607 of hip femoral endoprostheses
• CPC Class Codes: A61F 2002/30616 Sets comprising a plurality of prosthetic parts of different sizes or orientations
• CPC Class Codes: A61F 2002/3069 Revision endoprostheses
• CPC Class Codes: A61F 2002/30943 using mathematical models
• CPC Class Codes: A61F 2002/30948 using computerized tomography, i.e. CT scans
• CPC Class Codes: A61F 2002/30952 using CAD-CAM techniques or NC-techniques
• CPC Class Codes: A61F 2002/4619 for extraction
• CPC Class Codes: A61F 2002/4632 using computer-controlled surgery, e.g. robotic surgery
• CPC Class Codes: A61F 2002/4633 for selection of endoprosthetic joints or for pre-operative planning
• CPC Class Codes: G05B 19/4099 Surface or curve machining, making 3D objects, e.g. desktop manufacturing
• CPC Class Codes: G05B 2219/45094 Milling robot
• CPC Class Codes: G05B 2219/45168 Bone prosthesis
• CPC Class Codes: Y10S 128/922 including image analysis
• CPC Class Codes: Y10S 128/923 by comparison of patient data to other data

Abstract

Computer implemented systems and methods for removing bone cement or other material to replace a bone prosthesis is provided. A computer aided method of replacing a bone prosthesis according to the present invention comprises the steps of: receiving as input image data of a bone; identifying bounding contours of material in the image data surrounding a first bone prosthesis for removal; and generating system contours from the bounding contours, the system contours specifying a cavity to be cut in the bone to accommodate a second bone prosthesis.

Claims

1. A method for producing a cut file useful for controlling a robotic system for replacing a bone prosthesis, said method comprising the steps of:

receiving image data comprising an image of a bone;

identifying bounding contours of a non-bone material surrounding a first bone prosthesis to be removed in the image data;

generating system contours from the bounding contours, the system contours specifying a cavity to be cut in the bone to accommodate a second bone prosthesis;

generating a cut file from the system contours for use by the robotic system; and

storing the cut file in a tangible medium.

2. The method of claim 1, wherein the bounding contours specify a plurality of regions at varying depths.

3. The method of claim 2, wherein the step of generating the system contours from the bounding contours includes the step of enlarging a region at a depth to allow the cavity to be cut.

4. The method of claim 1, further comprising the step of generating a check file that specifies desired characteristics of the cavity.

5. The method of claim 1, further comprising the step of verifying that the second bone prosthesis is insertable in the cavity.

6. The method of claim 1, further comprising the step of receiving input from a user to select the second bone prosthesis from a plurality of prostheses.

7. The method of claim 1, further comprising the step of displaying on a display screen a plurality of cross-sectional views of the bone.

8. The method of claim 7, further comprising the step of displaying the bounding contours and system contours on the plurality of cross-sectional views.

9. The method of claim 8, further comprising the step of receiving input from a user to generate a cross-sectional view at a desired location.

10. The method of claim 1, further comprising the step of displaying on a display screen a three-dimensional model of the cavity.

11. The method of claim 1, further comprising the step of receiving input from a user to modify the bounding contours.

12. A computer program product for replacing a bone prosthesis, comprising:

computer readable code for receiving image data of a bone;

computer readable code for identifying bounding contours of a non-bone material in the image data, wherein said material surrounding a first bone prosthesis for removal;

computer readable code for generating system contours from the bounding contours, the system contours specifying a cavity to be cut in the bone to accommodate a second bone prosthesis;

computer readable code for generating a cut file from the system contours; and

a tangible medium for storing the computer readable codes.