title: Spinal factors influencing change in pelvic sagittal inclination from supine position to standing position in patients before total hip arthroplasty.
abstract: In some atypical patients, pelvic sagittal inclination (PSI) changes posteriorly by >10° from supine to standing position before total hip arthroplasty (THA). Several studies have suggested PSI in standing position is related to lumbar degeneration. The purpose of this study was to investigate spinal factors influencing changes in PSI from supine to standing position before THA. Participants comprised 163 consecutive patients who had undergone THA. Presence of compression fractures, presence of lumbar spondylolisthesis, thoracic kyphosis angle, lumbar lordosis angle, S1 anterior tilt angle and T4 plumb line position were investigated as spinal factors. Presence of compression fractures, age, presence of lumbar spondylolisthesis and small S1 anterior tilt angle were independently associated with posterior change in PSI from supine to standing position in patients before THA.
authors.affiliation: Department of Orthopaedic Medical Engineering Osaka University Graduate School of Medicine Suita, Japan.
authors.forename: Satoru
authors.initials: S
authors.lastname: Tamura
authors.affiliation: Department of Orthopaedic Surgery Osaka University Graduate School of Medicine Suita, Japan.
authors.forename: Masaki
authors.initials: M
authors.lastname: Takao
authors.affiliation: Department of Orthopaedic Surgery Osaka University Graduate School of Medicine Suita, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Sakai
authors.affiliation: Department of Orthopaedic Medical Engineering Osaka University Graduate School of Medicine Suita, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Nishii
authors.affiliation: Department of Orthopaedic Medical Engineering Osaka University Graduate School of Medicine Suita, Japan.
authors.forename: Nobuhiko
authors.initials: N
authors.lastname: Sugano
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip; D005260:Female; D006621:Hip Joint / Q000601:surgery; D006801:Humans; D007592:Joint Diseases / Q000601:surgery*; D008159:Lumbar Vertebrae / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D010384:Pelvic Bones / Q000000981:diagnostic imaging / Q000503:physiopathology*; D011187:Posture; D011859:Radiography; D013131:Spine / Q000000981:diagnostic imaging*; D016683:Supine Position
keywords: age; compression fracture; lumbar spondylolisthesis; pelvic sagittal inclination; total hip arthroplasty