Acetabular cup prosthesis positioning instrument and method

  • US 11,090,170 B2
  • Filed: 05/02/2018
  • Issued: 08/17/2021
  • Est. Priority Date: 06/11/2013
  • Status: Active Grant
First Claim
Patent Images

1. A cup impactor assembly comprising:

  • a shaft;

    a cup coupler at a cup end of the shaft adapted to releasably connect a cup in fixed relation for subsequent impacting;

    a handle at an impacting end of the shaft;

    a light projector mounted to at least one of the shaft and the handle, the light projector producing visual guidance toward at least one anatomical landmark of a pelvis, the light projector projecting at least two light beams angled relative to each other so as to diverge from one another from the light projector;

    an inertial sensor unit configured for producing at least an orientation output related to an orientation of the cup impactor assembly, the inertial sensor unit including a processor and a program executable by the processor and including;

    calibration data based on a planned geometric relation between an initial reference orientation of the cup impactor assembly and the at least one anatomical landmark of the pelvis as aligned with the visual guidance of the light projector, the calibration data for calibrating the inertial sensor unit relative to the pelvis for the inertial sensor unit to produce said orientation output; and

    a desired acetabular cup orientation data based on preoperative planning.

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