Depth limiter for robotically assisted arthroplasty
AssigneeZimmer, Inc.
InventorCharles M. Lawrie
Life of this patent
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Abstract
A robotically controlled depth limiter for a reamer, the depth limiter including a cylindrical housing configured to encompass a portion of a driveshaft of a reamer. The cylindrical housing can define a bore extending therethrough. The depth limiter can include a depth stop engaging the cylindrical housing within the bore, and define an opening configured to receive the driveshaft of the reamer. The depth stop can be configured to receive a signal via processing circuitry of a robotic arm to operate the depth stop to limit distal translation of the driveshaft relative to the cylindrical housing to control a cutting depth of the reamer.
Claims8
A method of robotically controlling a reamer, the method comprising:
- using processing circuitry, controlling movement of a robotic arm to position an end effector affixed to a distal end of the robotic arm at an acetabular surface of a patient, the end effector including a reamer extending distally therefrom;
- receiving a first radiographic image of the reamer and the acetabular surface of the patient to determine a first maximum cutting depth in the acetabular surface;
- and
- using the processing circuitry, electrically adjusting, based on the first radiographic image, a depth controller coupled to the reamer, to configure the depth controller to limit a maximum cutting depth of the reamer to the first maximum cutting depth.
A method of robotically controlling a reamer, the method comprising:
- using processing circuitry, controlling movement of a robotic arm to position an end effector affixed to a distal end of the robotic arm at an acetabular surface of a patient, the end effector including a reamer extending distally therefrom;
- receiving a first radiographic image of the reamer and the acetabular surface of the patient to determine a first maximum cutting depth in the acetabular surface;
- and
- manually adjusting, based on the first radiographic image, a depth controller coupled to the reamer, to configure the depth controller to limit a maximum cutting depth of the reamer to the first maximum cutting depth.
Dependencies are inferred from the claim text.