title: Practical implications of the lumbar spine and its function on total hip arthroplasty.
abstract: Correct component placement is of significant importance to ensure optimal outcomes in total hip arthroplasty (THA). Traditionally, the Lewinnek plane has been referenced as an adequate "safe zone", formed between the anterior superior iliac spines and public tubercles to optimize acetabular orientation. However, recent evidence shows that the positioning of this plane may vary due to the biomechanical relationship between the lumbar spine and hip. Therefore, the plane acquired intraoperatively may not accurately recreate the actual functional plane and acetabular orientation encountered outside of the intraoperative environment. This review summarizes the hip-spine relationship and its implications on THA.
authors.affiliation: Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia.
authors.forename: Vincent Vinh Gia
authors.initials: VV
authors.lastname: An
authors.affiliation: Department of Orthopaedic Surgery, Royal North Shore Hospital, Sydney, New South Wales, Australia.
authors.forename: Brahman Shankar
authors.initials: BS
authors.lastname: Sivakumar
authors.affiliation: Department of Orthopaedic Surgery, Concord Repatriation General Hospital, Sydney, New South Wales, Australia.
authors.forename: Yadin David
authors.initials: YD
authors.lastname: Levy
authors.affiliation: University of Sydney, Camperdown, New South Wales, Australia;; Optimized Ortho, Sydney, Australia.
authors.forename: Jim
authors.initials: J
authors.lastname: Pierrepont
authors.affiliation: Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia;; Department of Orthopaedic Surgery, Royal North Shore Hospital, Sydney, New South Wales, Australia.
authors.forename: Warwick James
authors.initials: WJ
authors.lastname: Bruce
keywords: Hip arthroplasty; deformity; lumbar spine; review