title: Limited significance of screening computed tomography after cementless total hip arthroplasty with highly cross-linked polyethylene at 7-10 years of follow-up.
abstract: OBJECTIVE
  The purpose of this retrospective study is to report the incidence of osteolysis and evaluate the significance of screening computed tomography (CT) compared to plain radiography in detecting osteolysis after total hip arthroplasty with metal-on-highly cross-linked polyethylene bearings.
  
  
  METHODS
  We retrospectively reviewed 264 primary cementless total hip arthroplasties of 211 patients, 24 males, 187 females, who received postoperative screening CT scan in addition to radiography at postoperative 7-10 years (average 8.2 years). First-generation highly cross-linked polyethylene was used in all cases.
  
  
  RESULTS
  On the plain radiographs, no acetabular osteolysis (0%) and two cases of femoral osteolysis (0.8%) were found in the follow-up period. No osteolysis was newly found by screening CT scan.
  
  
  CONCLUSIONS
  Very low incidence of osteolysis after total hip arthroplasty with highly cross-linked polyethylene at postoperative 7-10 years was confirmed, and routine screening CT scan for detecting osteolysis in this setting was not supported from this study.
authors.affiliation: a Department of Orthopaedic Surgery , Medical Hospital, Tokyo Medical and Dental University , Tokyo , Japan.
authors.forename: Ryohei
authors.initials: R
authors.lastname: Takada
authors.affiliation: a Department of Orthopaedic Surgery , Medical Hospital, Tokyo Medical and Dental University , Tokyo , Japan.
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Jinno
authors.affiliation: a Department of Orthopaedic Surgery , Medical Hospital, Tokyo Medical and Dental University , Tokyo , Japan.
authors.forename: Daisuke
authors.initials: D
authors.lastname: Koga
authors.affiliation: a Department of Orthopaedic Surgery , Medical Hospital, Tokyo Medical and Dental University , Tokyo , Japan.
authors.forename: Yuki
authors.initials: Y
authors.lastname: Yamauchi
authors.affiliation: a Department of Orthopaedic Surgery , Medical Hospital, Tokyo Medical and Dental University , Tokyo , Japan.
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Asou
authors.affiliation: a Department of Orthopaedic Surgery , Medical Hospital, Tokyo Medical and Dental University , Tokyo , Japan.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Muneta
authors.affiliation: a Department of Orthopaedic Surgery , Medical Hospital, Tokyo Medical and Dental University , Tokyo , Japan.
authors.forename: Atsushi
authors.initials: A
authors.lastname: Okawa
mesh_terms: D000077:Acetabulum / Q000000981:diagnostic imaging* / Q000601:surgery; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects*; D005260:Female; D005500:Follow-Up Studies; D006621:Hip Joint / Q000000981:diagnostic imaging* / Q000601:surgery; D006622:Hip Prosthesis / Q000009:adverse effects*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010014:Osteolysis / Q000000981:diagnostic imaging*; D020959:Polyethylene; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed; D055815:Young Adult
chemical_list: D020959:Polyethylene
keywords: Annealed; Fit and fill stem; Modular acetabular cup; Radiographic analysis; Remelted