title: Ulnar shortening osteotomy with a premounted sliding-hole plate.
abstract: BACKGROUND
  Ulnar shortening osteotomy represents a common procedure for various ulnar-sided wrist disorders but is still associated with complications like malrotation, angulation, or nonunion because of incomplete closure of the osteotomy gap. We describe the use of a newly developed palmarly placed sliding-hole dynamic compression plate that allows fixation of the ulna before the oblique osteotomy is carried out.
  
  
  METHODS
  We performed ulnar shortening osteotomy on 27 consecutive patients. The indication was ulnar impaction syndrome in 25 patients and symptomatic ulnar plus variance secondary to malunited distal radial fracture in 2 patients. The mean preoperative ulnar variance was +2.1 mm (range, +1 mm to +8 mm). All patients were evaluated before and after surgery and graded with the Disability of Arm-Shoulder-Hand (DASH) scoring system.
  
  
  RESULTS
  All 27 osteotomies healed uneventfully over an average of 9.2 +/- 2.1 weeks. The mean postoperative ulnar variance was -2.1 mm (range, -3.1 mm to 0 mm). There were significant improvements in DASH score, pain, and grip strength at an average follow-up of 8.1 months. Six patients complained of plate irritation.
  
  
  CONCLUSIONS
  Favorable results suggest that ulnar shortening osteotomy using an oblique osteotomy and a premounted sliding-hole compression plate avoids malrotation and angulation and is associated with satisfactory outcomes. This device does not require an assisting device, which minimizes the surgical exposure of the ulna. Palmar placement of the plate seems to reduce hardware irritation.
authors.affiliation: Division of Plastic and Reconstructive Surgery, Department of Surgery, Medical University of Vienna, Vienna, Austria. hugo@kitzinger.de
authors.forename: Hugo B
authors.initials: HB
authors.lastname: Kitzinger
authors.forename: Birgit
authors.initials: B
authors.lastname: Karle
authors.forename: Steffen
authors.initials: S
authors.lastname: Löw
authors.forename: Hermann
authors.initials: H
authors.lastname: Krimmer
mesh_terms: D000328:Adult; D001860:Bone Plates; D004867:Equipment Design; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010027:Osteotomy / Q000295:instrumentation*; D011859:Radiography; D014457:Ulna / Q000000981:diagnostic imaging / Q000601:surgery*