title: Internal fixation of proximal humeral fractures with a locking compression plate: a retrospective evaluation of 72 patients followed for a minimum of 1 year.
abstract: BACKGROUND
  Proximal humeral fractures, particularly in osteoporotic patients, remain an unsolved problem as regards the durability of the osteosynthesis. The AO/ASIF group has developed a new technique which aims to preserve the biological integrity of the humeral head and secures the reduction using multiple locking screws with angular stability (Philos), thus allowing an early mobilization.
  
  
  METHODS
  We retrospectively reviewed the complications and functional outcome after a minimum follow-up of 1 year in 72 patients treated with this new method. 2 fractures failed to unite, and 3 patients developed an avascular necrosis of the humeral head. In addition, 2 implant failures were observed due to a technical error. According to the Constant score, the functional outcome was acceptable even in elderly patients.
  
  
  CONCLUSIONS
  The Philos method appears to be safe and can be recommended for the treatment of proximal humeral fractures in patients with poor bone quality.
authors.affiliation: Department of Orthopaedics and Traumatology, Helsinki University Central Hospital, Helsinki, Finland.
authors.forename: Jan-Magnus
authors.initials: JM
authors.lastname: Björkenheim
authors.forename: Jarkko
authors.initials: J
authors.lastname: Pajarinen
authors.forename: Vesa
authors.initials: V
authors.lastname: Savolainen
mesh_terms: D000328:Adult; D000368:Aged; D001860:Bone Plates; D005260:Female; D005500:Follow-Up Studies; D005593:Fracture Fixation, Internal / Q000009:adverse effects / Q000295:instrumentation / Q000379:methods*; D017102:Fracture Healing; D006801:Humans; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D012784:Shoulder Fractures / Q000601:surgery*; D016896:Treatment Outcome