title: [Management of complications after angularly stable locking proximal humerus plate fixation].
abstract: OBJECTIVE
  In this prospective study, complications observed after angularly stable proximal humerus plate fixation (locking proximal humerus plate) were analysed by deriving specific therapies.
  
  
  METHODS
  Fifty patients (median age 65 years, range 25-84 years, 39 female, 11 male) with displaced proximal humerus fractures (seven single, 36 double, and seven triple fractures) were evaluated 3, 6, and 12 months after angularly stable plate fixation using a standard protocol.
  
  
  RESULTS
  Age- and gender-matched median constant scores 12 months postoperatively showed for the three fracture types 86, 87, and 55 points and complication rates of 14, 19, and 100%, respectively. There were seven primary and seven secondary implant displacements, five humeral head necroses, four osseous malalignments, two nonunions, two deep infections, and one heterotopic ossification. Nine reoperations were required in six patients: implant removal (n=3), reosteosynthesis (n=2), revision because of nonunion (n=2), and deep infection (n=2).
  
  
  CONCLUSIONS
  Differentiated analysis of complications and the development of specific prevention and therapeutic strategies considering surgical technique, implant, fracture morphology, and humeral head perfusion minimize the rate of complications observed after angularly stable locking proximal humerus plate fixation.
authors.affiliation: Klinik für Unfall- und Wiederherstellungschirurgie, Friederikenstift Hannover mit Unfallklinik, Humboldtstrasse 5, 30169 Hannover, Germany. christine.voigt@friederikenstift.de
authors.forename: C
authors.initials: C
authors.lastname: Voigt
authors.forename: A
authors.initials: A
authors.lastname: Woltmann
authors.forename: A
authors.initials: A
authors.lastname: Partenheimer
authors.forename: H
authors.initials: H
authors.lastname: Lill
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001860:Bone Plates; D001863:Bone Screws; D020878:Device Removal; D004868:Equipment Failure; D005260:Female; D005500:Follow-Up Studies; D005593:Fracture Fixation, Internal / Q000295:instrumentation*; D017102:Fracture Healing; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000175:diagnosis / Q000601:surgery*; D011859:Radiography; D020127:Recovery of Function; D012086:Reoperation; D012784:Shoulder Fractures / Q000000981:diagnostic imaging / Q000601:surgery*