#1 Total hip replacement	“total hip arthroplasty” OR THA OR “total hip replacement” OR THR OR MeSH descriptor: [Arthroplasty, replacement, hip] explode all trees
#2 Post-traumatic arthritis	“post traumatic arthritis” OR “post traumatic osteoarthritis” OR arthritis OR MeSH descriptor: [Arthritis] explode all trees
#3 History acetabular fracture	acetabular OR acetabulum OR MeSH descriptor: [Acetabulum] explode all trees
#4 Outcome	“functional outcome” OR revision OR infection OR complication OR “postoperative complication” OR dislocation OR loosening OR “peri-prosthetic fracture” OR fracture OR mortality OR revision OR “blood loss” OR MeSH descriptor: [Reoperation] explode all trees OR MeSH descriptor: [Mortality] explode all trees OR MeSH descriptor: [Infections] explode all trees OR MeSH descriptor: [Intraoperative Complications] explode all trees OR MeSH descriptor: [Postoperative Complications] explode all trees OR MeSH descriptor: [Hip Dislocation] explode all trees OR MeSH descriptor: [Blood Loss, Surgical] explode all trees