title: Total Hip Arthroplasty Using the S-ROM-A Prosthesis for Anatomically Difficult Asian Patients.
abstract: BACKGROUND
  The S-ROM-A prosthesis has been designed for the Asian proximal femur with a small deformed shape and narrow canal. In this study, the clinical and radiological results using the S-ROM-A prosthesis for Japanese patients with severe deformity due to dysplasia and excessive posterior pelvic tilt were examined.
  
  
  METHODS
  94 hips were followed up for a mean of 55 months, with a mean age at surgery of 61 years. The primary diagnoses were 94 coxarthritis cases, including 51 dysplasia and 37 primary OA, 1 avascular necrosis, 2 traumatic arthritis, and 3 Perthes disease. Thirty-one hips had been treated with osteotomy of the hip joints. Preoperative intramedullary canal shapes were stovepipe in 23 hips, normal in 51 hips, and champagne-flute in 5 hips. The maximum pelvic inclination angle was 56°.
  
  
  RESULTS
  The mean JOA score improved from 46 points preoperatively to 80 points at final follow-up. On radiological evaluation of the fixation of the implants according to the Engh classification, 92 (97%) hips were classified as "bone ingrown fixation."
  
  
  CONCLUSIONS
  In primary THA, using the S-ROM-A prosthesis for Asian patients with proximal femoral deformity, even after osteotomy and with posterior pelvic tilt, provided good short- to midterm results.
authors.affiliation: Department of Orthopaedic Surgery, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan.
authors.forename: Akira
authors.initials: A
authors.lastname: Hozumi
authors.affiliation: Department of Orthopaedic Surgery, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan.
authors.forename: Kyousuke
authors.initials: K
authors.lastname: Kobayashi
authors.affiliation: Department of Orthopaedic Surgery, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan.
authors.forename: Nobuhisa
authors.initials: N
authors.lastname: Tsuru
authors.affiliation: Department of Orthopaedic Surgery, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan.
authors.forename: Chikara
authors.initials: C
authors.lastname: Miyamoto
authors.affiliation: Department of Orthopaedic Surgery, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan.
authors.forename: Jyunichiro
authors.initials: J
authors.lastname: Maeda
authors.affiliation: Department of Orthopaedic Surgery, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan.
authors.forename: Ko
authors.initials: K
authors.lastname: Chiba
authors.affiliation: Department of Orthopaedic Surgery, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan.
authors.forename: Hisataka
authors.initials: H
authors.lastname: Goto
authors.affiliation: Department of Orthopaedic Surgery, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan.
authors.forename: Makoto
authors.initials: M
authors.lastname: Osaki
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip; D044466:Asian People; D005260:Female; D005269:Femur / Q000503:physiopathology* / Q000601:surgery; D006621:Hip Joint / Q000503:physiopathology* / Q000601:surgery; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D011474:Prosthesis Design; D016896:Treatment Outcome