HIP REPLACEMENT IN COMPUTER-ASSISTED SURGERY
First Claim
1. A device for digitizing a femoral neck axis of with respect to a pelvic frame of reference in computer-assisted surgery, comprising:
- a trackable member trackable for position and orientation by a computer-assisted surgery system;
a body connected to the trackable member, the body having an interface portion adapted to be releasably coupled to a neck of one of an implanted femoral implant and a provisional in a known relation, and a bone interface portion adapted to be positioned against a pelvis such that the body of the device interrelates the implanted femoral implant or provisional to the pelvis, the neck axis of the femoral implant or provisional being calculable thereat with respect to the pelvic frame of reference as a function of the known relation and of the position and orientation of the trackable member.
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Accused Products
Abstract
A system for calculating a position and orientation of an acetabular cup in computer-assisted surgery comprises a first trackable reference secured to a pelvis, with a frame of reference being associated with the first trackable reference. A device is positionable between a femoral neck and the acetabulum of the pelvis in a known relation, the device having a second trackable reference. Sensors track the trackable references for position and orientation. A position/orientation calculator calculates a position and orientation of the frame of reference and of the device and for determining an orientation of the neck axis with respect to the frame of reference from the known relation at a desired position of the femur. An implant position/orientation calculator provides cup implanting information with respect to the orientation of said neck axis as a function of the tracking for position and orientation of at least the first trackable reference.
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Citations
16 Claims
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1. A device for digitizing a femoral neck axis of with respect to a pelvic frame of reference in computer-assisted surgery, comprising:
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a trackable member trackable for position and orientation by a computer-assisted surgery system; a body connected to the trackable member, the body having an interface portion adapted to be releasably coupled to a neck of one of an implanted femoral implant and a provisional in a known relation, and a bone interface portion adapted to be positioned against a pelvis such that the body of the device interrelates the implanted femoral implant or provisional to the pelvis, the neck axis of the femoral implant or provisional being calculable thereat with respect to the pelvic frame of reference as a function of the known relation and of the position and orientation of the trackable member. - View Dependent Claims (8)
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2. A method of doing surgical treatment in computer-assisted surgery for guiding an operator in inserting a cup implant of a hip joint implant into an acetabulum, comprising:
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positioning a trackable reference on a pelvis, the trackable reference being trackable in space for position and orientation so as to define a frame of reference; inserting any one of a provisional and a femoral implant into a femur; digitizing a neck axis of the provisional or femoral implant with respect to the frame of reference; and inserting the cup implant into the acetabulum by obtaining cup implanting information with respect to the orientation of said neck axis as a function of the tracking for position and orientation of the trackable reference. - View Dependent Claims (3, 4, 5, 6, 7)
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9. A system for calculating a position and orientation of an acetabular cup in computer-assisted surgery, comprising:
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a first trackable reference secured to a pelvis, with a frame of reference being associated with the first trackable reference; a device positionable between a femoral neck and the acetabulum of the pelvis in a known relation, the device having a second trackable reference; sensors for tracking the trackable references for position and orientation; a position/orientation calculator for calculating a position and orientation of the frame of reference and of the device and for determining an orientation of the neck axis with respect to the frame of reference from the known relation at a desired position of the femur; and an implant position/orientation calculator for providing cup implanting information with respect to the orientation of said neck axis as a function of the tracking for position and orientation of at least the first trackable reference. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification