title: Long-Term Outcomes of Liner Cementation into a Stable Retained Shell: A Concise Follow-up of a Previous Report.
abstract: Liner cementation into a preexisting stable socket may reduce the morbidity of revision hip arthroplasty and preserve acetabular bone. However, the long-term outcomes of this technique remain unknown. The purpose of this report was to analyze the long-term results of a previously reported cohort of patients. Cementation of thirty-two liners (seventeen polyethylene and fifteen metal liners) into preexisting sockets was performed during revision hip arthroplasty, and the patients were followed for a minimum of two years. A retrospective chart review was performed to investigate the complications and survivorship. The mean duration of follow-up was 12.7 years (range, 2.1 to 19.1 years), with ten hips requiring rerevision at a mean of 6.4 years (range, 1.0 to 15.5 years). Nine patients experienced posterior dislocations, and two hips required rerevision for instability. Liner dissociation from the shell occurred in two patients. Survivorship analysis, with rerevision as the end point, demonstrated ten and fifteen-year survivorship of 77.3% and 68.8%, respectively. Dissociation of the cemented liner from the acetabular shell was an infrequent cause of failure despite long-term follow-up. Given the high rate of dislocations in this study, careful patient selection and surgical technique should be considered.
  
  
  METHODS
  Therapeutic Level III. See Instructions for Authors for a complete description of levels of evidence.
authors.affiliation: The J. Vernon Luck, Sr., M.D. Orthopaedic Research Center, Orthopaedic Institute for Children and UCLA Department of Orthopaedic Surgery, 403 West Adams Boulevard, Los Angeles, CA 90007.
authors.forename: Timothy L
authors.initials: TL
authors.lastname: Tan
authors.affiliation: Joint Replacement Institute at St. Vincent Medical Center, 2200 West Third Street, Suite 400, Los Angeles, CA 90057. E-mail address for H.C. Amstutz: harlanamstutz@dochs.org.
authors.forename: Michel J
authors.initials: MJ
authors.lastname: Le Duff
authors.affiliation: The J. Vernon Luck, Sr., M.D. Orthopaedic Research Center, Orthopaedic Institute for Children and UCLA Department of Orthopaedic Surgery, 403 West Adams Boulevard, Los Angeles, CA 90007.
authors.forename: Edward
authors.initials: E
authors.lastname: Ebramzadeh
authors.affiliation: Joint Replacement Institute at St. Vincent Medical Center, 2200 West Third Street, Suite 400, Los Angeles, CA 90057. E-mail address for H.C. Amstutz: harlanamstutz@dochs.org.
authors.forename: Sandeep K
authors.initials: SK
authors.lastname: Bhaurla
authors.affiliation: Joint Replacement Institute at St. Vincent Medical Center, 2200 West Third Street, Suite 400, Los Angeles, CA 90057. E-mail address for H.C. Amstutz: harlanamstutz@dochs.org.
authors.forename: Harlan C
authors.initials: HC
authors.lastname: Amstutz
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects / Q000295:instrumentation / Q000379:methods*; D001843:Bone Cements / Q000627:therapeutic use; D002484:Cementation / Q000009:adverse effects / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D006617:Hip Dislocation / Q000209:etiology; D006622:Hip Prosthesis / Q000009:adverse effects; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D020959:Polyethylene / Q000627:therapeutic use; D011475:Prosthesis Failure / Q000009:adverse effects; D012086:Reoperation / Q000379:methods; D012189:Retrospective Studies
chemical_list: D001843:Bone Cements; D020959:Polyethylene