Free hand navigation instruments for total hip arthroplasty

A method for placing an acetabular shell in a prepared acetabulum of a patient in a total hip arthroplasty (THA) procedure, comprising:

• assembling a navigated inserter construct;
• providing a camera tracking system adapted to track a pose of the navigated inserter construct relative to the patient, wherein the camera tracking system is in communication with a computer platform;
• displaying navigation guidance to a user;
• inserting the acetabular shell into the prepared acetabulum of the patient using the navigated inserter construct;
• setting a trajectory of the navigated inserter construct based on the navigation guidance;
• impacting the navigated inserter construct along the trajectory;
• and
• removing the navigated inserter construct from the acetabular shell.

A method for performing a navigation-assisted total hip arthroplasty (THA) procedure, comprising:

• providing a camera tracking system adapted to track one or more tracking arrays, and a computer platform in communication with the camera tracking system;
• affixing a first tracking array to a pelvis of a patient, wherein the first tracking array comprises a plurality of reference elements adapted for tracking by the camera tracking system;
• assembling a navigated reamer construct comprising a reamer, a reamer basket of a selected size, and a second tracking array, wherein the second tracking array comprises a plurality of reference elements adapted for tracking a pose of the navigated reamer construct by the camera tracking system;
• inserting the reamer basket of the navigated reamer construct into an acetabulum of the patient;
• displaying navigation guidance to a user for the navigated reamer construct;
• reaming the acetabulum with the navigated reamer construct, based on the navigation guidance displayed to the user;
• removing the navigated reamer construct from the acetabulum;
• assembling a navigated inserter construct comprising an inserter, an acetabular shell coupled thereto, and a third tracking array comprising a plurality of reference elements adapted for tracking a pose of the navigated inserter construct by the camera tracking system;
• displaying navigation guidance to a user for the navigated inserter construct;
• inserting the acetabular shell into the acetabulum of the patient using the navigated inserter construct;
• setting a trajectory of the navigated inserter construct based on the navigation guidance;
• impacting the navigated inserter construct along the trajectory;
• and
• removing the navigated inserter construct from the acetabular shell.