Technical Note on Using Intraoperative Smartphone Applications to Adjust Cup Inclination Angle during Total Hip Arthroplasty (THA).

Acetabular cup optimum position is paramount for total hip arthroplasty (THA) good outcomes. Although controversial, Lewinnek proposed safe zone for cup placement still the most widely accepted target. Cup placement can be improved using specific anatomical landmarks, computer navigation system and handheld navigation devices.

Post-operative hip centre restoration and migration after impaction bone grafting in revision and complex primary hip arthroplasty.

Introduction/objectives: Although impaction grafting proved efficacy in the reconstruction of acetabular defects in primary and revision hip arthroplasty, its role in large segmental defects is still debatable. Our objective is to determine hip centre restoration and last follow-up migration after acetabular reconstruction with impaction grafting in different types of acetabular defects.

Methods: This is a single-centre retrospective radiographic study of (107) total hip arthroplasty (42 primary and 65 revision) in (104) patients using impaction grafting.

The use of pararectus approach for Type 3B Paprosky acetabular defect with intrapelvic cup migration. Case report.

A case of Type 3B Paprosky acetabular defect with intrapelvic cup migration where anterior column plating and cup extraction was done through an abdominal pararectus approach. A male patient 63 years old reported progressive pain and walking disability after five years of cementless THR for right hip AVN. CT pelvis showed loose intrapelvic migrated cup, extensive osteolytic acetabular defects, and pelvic discontinuity.