Howmedica Osteonics Corporation

Otismed Corporation

Keun Song

Ilwhan Park

Oleg Mishin

Michael Santarella

Elena I Pavlovskaia

Boris E Shpungin

Methods of manufacturing a custom arthroplasty resection guide or jig are disclosed herein. For example, one method may include: generating MRI knee coil two dimensional images, wherein the knee coil images include a knee region of a patient; generating MRI body coil two dimensional images, wherein the body cod images include a hip region of the patient, the knee region of the patient and an ankle region of the patient; in the knee coil images, identifying first locations of knee landmarks; in the body coil images, identifying second locations of the knee landmarks; run a transformation with the first and second locations, causing the knee coil images and body coil images to generally correspond with each other with respect to location and orientation.

Preoperatively planning an arthroplasty procedure and generating a corresponding patient specific arthroplasty resection guide

A method of planning an arthroplasty procedure on a femur and tibia of a patient. The method includes receiving a first two-dimensional image of the femur and the tibia, and identifying, in the first two-dimensional image, a proximal femur feature, a distal tibia feature, and a bone contour. The method further includes running a transformation process to align a bone model representative of the femur and the tibia into a coordinate system with the first two-dimensional image, the bone model having a bone model contour that is aligned with the bone contour of the femur and the tibia in the first two-dimensional image. And the method further includes applying an implant model to the bone model in order to determine coordinate locations for the arthroplasty resection.

Methods of manufacturing a custom arthroplasty resection guide or jig are disclosed herein. For example, one method may include: generating MRI knee coil two dimensional images, wherein the knee coil images include a knee region of a patient; generating MRI body coil two dimensional images, wherein the body coil images include a hip region of the patient, the knee region of the patient and an ankle region of the patient; in the knee coil images, identifying first locations of knee landmarks; in the body coil images, identifying second locations of the knee landmarks; run a transformation with the first and second locations, causing the knee coil images and body coil images to generally correspond with each other with respect to location and orientation.

Implementations described and claimed herein provide an arthroplasty system and methods for positioning an acetabular cup implant. In one implementation, the system includes a shape-match hip guide having a patient specific mating region that is a negative of the surface contour of the inside surface of the patient's acetabular cup, and a directional rod that extends generally along the axis of the patient's femoral head and femoral neck. They system can additionally include an outrigger or silo device to aid in the alignment of surgical tools for preparing and implanting of the prosthetic acetabular cup in the patient's acetabular cup. Related methods are also disclosed herein for generating a shape-match guide and implanting an acetabular cup with the guide.

Customized acetabular cup positioning guide and method of generating and employing such a guide

An arthroplasty system for making resections in a patient knee. The system includes a femoral cutting guide having a patient specific mating region, and a distal planar surface distally spaced from a distal resection surface based on thicknesses of femoral and tibial implants. The distal planar surface may be used to check ligament balance. The system further includes a tibial cutting guide having a patient specific mating region and an anchor pin hole intersecting with a proximal resection slot near a medial or lateral edge of the proximal resection slot. The anchor pin hole being configured to receive an anchor pin that may serve as a sawing stop during a proximal resection.

Customized arthroplasty cutting guides and surgical methods using the same

Implementations described and claimed herein provide an arthroplasty system for making resections in a patient knee. In one implementation, the system includes a femoral cutting guide having a patient specific mating region, and a distal planar surface distally spaced from a distal resection surface based on thicknesses of femoral and tibial implants. The distal planar surface may be used to check ligament balance. The system further includes a tibial cutting guide having a patient specific mating region and a an anchor pin hole intersecting with a proximal resection slot near a medial or lateral edge of the proximal resection slot. The anchor pin hole being configured to receive an anchor pin that may serve as a sawing stop during a proximal resection.

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Palo Alto, CA, United States of America

Keun Song