title: Effective prevention of recurrent dislocation following primary cemented Endo-MarkIII/SP2 total hip arthroplasty using a posterior lip augmentation device.
abstract: OBJECTIVE
  This retrospective study was performed to determine the effectiveness of preventing recurrent dislocation following primary cemented Endo-MarkIII/SP2 total hip replacement using a posterior lip augmentation device (PLAD).
  
  
  METHODS
  Between January 2003 and Dezember 2006, 27 PLADs were used in the treatment of recurrent hip dislocation in 27 patients who had received a cemented primary total hip arthroplasty using Endo-MarkIII/SP2 (Waldemar LINK, Hamburg, Germany) components. The mean number of dislocations prior to stabilization with this specific device was 2.6 (range 2-4, SD ± 0.4) with a mean time to revision surgery of 10 months (IQR 13). The mean age of the patients at time of revision surgery was 81.5 years (range 70-94, SD ± 6.9). The control group evaluating the clinical outcome using the Harris Hip Score (HHS) also received a cemented primary total hip arthroplasty using the same implants. A retrospective clinical and radiological review was carried out at a mean follow-up of 68.5 months (range 30-103, SD ± 17.7).
  
  
  RESULTS
  Of the 27 patients, 6 had died at the time of the latest review, with the posterior lip augmentation device still in situ and without reported further dislocation after PLAD application. In 2 of the remaining 21 patients recurrent dislocation occurred, thus a subsequent revision of respective implants had to be performed to achieve persistent joint stability. At latest follow-up no deep infection or implant loosening occurred.
  
  
  CONCLUSIONS
  Surgical treatment of recurrent dislocation following primary cemented Endo-MarkIII/SP2 total hip replacement using a posterior lip augmentation device is a safe and effective procedure which can lead to a secondary stabilization of the total hip arthroplasty in about 90 % of the patients.
authors.affiliation: Orthopedic Surgery HELIOS ENDO-Klinik Hamburg, Hamburg, Germany. st.schmidl@hotmail.de.
authors.forename: S
authors.initials: S
authors.lastname: Schmidl
authors.affiliation: Orthopedic Surgery HELIOS ENDO-Klinik Hamburg, Hamburg, Germany.
authors.forename: O
authors.initials: O
authors.lastname: Jakobs
authors.affiliation: Department of Trauma, Hannover Medical School, Hannover, Germany.
authors.forename: D
authors.initials: D
authors.lastname: Guenther
authors.affiliation: Orthopedic Surgery HELIOS ENDO-Klinik Hamburg, Hamburg, Germany.
authors.forename: C
authors.initials: C
authors.lastname: Lausmann
authors.affiliation: Orthopedic Surgery HELIOS ENDO-Klinik Hamburg, Hamburg, Germany.
authors.forename: B
authors.initials: B
authors.lastname: Schoof
authors.affiliation: Sportsclinic Stuttgart, Stuttgart, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Beckmann
authors.affiliation: Orthopedic Surgery HELIOS ENDO-Klinik Hamburg, Hamburg, Germany.
authors.forename: T
authors.initials: T
authors.lastname: Gehrke
authors.affiliation: Orthopedic Surgery HELIOS ENDO-Klinik Hamburg, Hamburg, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Gebauer
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation / Q000379:methods; D005260:Female; D005500:Follow-Up Studies; D006617:Hip Dislocation / Q000209:etiology / Q000517:prevention & control*; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D011183:Postoperative Complications / Q000517:prevention & control*; D019736:Prostheses and Implants; D012086:Reoperation; D012189:Retrospective Studies; D016896:Treatment Outcome
keywords: Endo-MarkIII/SP2; PLAD; Posterior lip augmentation; Recurrent dislocation hip arthroplasty