title: Favorable Results of a Short, Tapered, Highly Porous, Proximally Coated Cementless Femoral Stem at a Minimum 4-Year Follow-Up.
abstract: BACKGROUND
  Shorter femoral stems have been increasingly used in total hip arthroplasty. However, there are few clinical studies evaluating the outcomes of these stems and comparing them to their regular-sized counterparts.
  
  
  METHODS
  Our study provides radiologic and functional outcomes at 5-year mean follow-up of 131 cementless Tri-Lock Bone Preservation Stems, a short tapered stem with a proximal porous coating.
  
  
  RESULTS
  Stem-related complications were low with one revision for stem aseptic loosening. Kaplan-Meier analysis estimated 99.2% stem survival rate at 5 years, comparable to conventional length Tri-Lock stems (99.8% at 8.9 years).
  
  
  CONCLUSIONS
  This study demonstrates that the Tri-Lock Bone Preservation Stem can provide successful outcomes at 5-year follow-up. Further studies are required to determine the long-term outcome of these implants in patients with poor bone stock.
authors.affiliation: Division of Orthopaedic Surgery, McGill University, Montreal, QC, Canada.
authors.forename: Anthony
authors.initials: A
authors.lastname: Albers
authors.affiliation: Division of Orthopaedic Surgery, McGill University, Montreal, QC, Canada.
authors.forename: Ahmed A
authors.initials: AA
authors.lastname: Aoude
authors.affiliation: Division of Orthopaedic Surgery, McGill University, Montreal, QC, Canada.
authors.forename: David J
authors.initials: DJ
authors.lastname: Zukor
authors.affiliation: Division of Orthopaedic Surgery, McGill University, Montreal, QC, Canada.
authors.forename: Olga L
authors.initials: OL
authors.lastname: Huk
authors.affiliation: Division of Orthopaedic Surgery, McGill University, Montreal, QC, Canada.
authors.forename: John
authors.initials: J
authors.lastname: Antoniou
authors.affiliation: Division of Orthopaedic Surgery, McGill University, Montreal, QC, Canada.
authors.forename: Michael
authors.initials: M
authors.lastname: Tanzer
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation*; D001842:Bone and Bones / Q000601:surgery; D005260:Female; D005269:Femur / Q000601:surgery; D005500:Follow-Up Studies; D006622:Hip Prosthesis / Q000706:statistics & numerical data*; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D016062:Porosity; D011474:Prosthesis Design; D012086:Reoperation; D016896:Treatment Outcome
keywords: cementless; primary; short stem; taper; total hip arthroplasty