3D CT ASSESSMENT OF BULLSEYE, A NEW PATIENT-SPECIFIC INSTRUMENT FOR PRECISION PLACEMENT OF THE ACETABULAR COMPONENT OF HIP ARTHROPLASTY

BackgroundSurgeons are waiting for a hassle free, time saving, precise and accurate guide for hip arthroplasty. Industry are waiting for instruments to reduce manufacturing costs associated with washing, assembling, sterilization and transportation. Patient specific / custom made surgical guides may deliver these goals but current systems have had limited assessments.We comprehensively assessed a new guiding system for the acetabular component of hip replacement, “Bullseye”.MethodsPlanning. We used either Computer Tomography (CT) (n=22) or Magnetic Resonance (MR) (n=6) imaging to plan the position of acetabular components into 28 acetabulums of cadavers (n=12) and dry bone models (n=16). 10 of the dry bone models had complex deformities (crowe 4 hip dysplasia or Paprosky 3A defects).Surgical positioning. Patient specific “Bullseye” guides were manufactured using 3D printing and standard instruments were used to ream the acetabulum, guided by Bullseye, and position cup components.Post surgery. The pelvises...