title: [Early results of revision hip arthroplasty using modular Restoration stem].
abstract: There is an increasing number of hip joint arthroplasty procedures all over the world which are followed by revision surgery. The cases of severe bone loss and periprosthetic fractures revision of a stem can constitue a serious challenge even for an experienced orthopedic surgeon.
  
  
  METHODS
  In the research material there are 18 patients 6-50 months after the stem of the hip prosthesis revision with Stryker Restoration modular stem.
  
  
  METHODS
  Clinical evaluation according to HHS protocol, the quality of life measured with SF-36 form, and physical activity evaluated using UCLA score. The methods are also AP and X-Ray of both hips and lateral X-ray of revised hip with osteolysis around stem, stem subsidence, and difference in leg length evaluation, as well as the comparison of hip offsets.
  
  
  RESULTS
  Mean HHS score was 78.6 pts, mean SF-36 based quality of life 50.5 pts, and the mean UCLA 4.72. Radiolucent zones around the stem were observed in several cases which were correlated with the stem subsidence.
  
  
  CONCLUSIONS
  The clinical results in this study are similar to those from the literature, and slightly lower than of the patients after primary hip arthroplasty, particularly in function measuring subscales. The quality of life scores of our patients was significantly lower than reported by other authors in cases of hip revision arthroplasty. There was no case of aseptic loosening. Further observation of the patients considering osteolysis and its relation to stem subsidence is needed.
authors.affiliation: Klinika Ortopedii Ogólnej, Onkologicznej i Traumatologii, Uniwersytet Medyczny im. Karola Marcinkowskiego w Poznaniu. p.nikrat@gmail.com
authors.forename: Patryk
authors.initials: P
authors.lastname: Nikratowicz
authors.forename: Waldemar
authors.initials: W
authors.lastname: Woźniak
authors.forename: Maciej
authors.initials: M
authors.lastname: Kluczyński
authors.forename: Małgorzata
authors.initials: M
authors.lastname: Wierusz-Kozłowska
mesh_terms: D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation* / Q000379:methods*; D005260:Female; D005270:Femur Head / Q000601:surgery*; D005500:Follow-Up Studies; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D011474:Prosthesis Design; D016059:Range of Motion, Articular; D012086:Reoperation / Q000295:instrumentation / Q000379:methods; D016896:Treatment Outcome