title: [Application of lateral malleolus hook-plate in treatment of stage II supination-adduction type medial malleolus fracture].
abstract: OBJECTIVE
  To investigate the application of lateral malleolus hook-plate for the treatment of stage II supination-adduction type medial malleolus fractures.
  
  
  METHODS
  Between January 2011 and June 2013, 21 patients with stage II supination-adduction type ankle fractures were treated with lateral malleolus hook-plate, including 12 males and 9 females with an average age of 55.5 years (range, 27-65 years). The injury causes were sprain in 17 cases and traffic accident in 4 cases. The mean time between injury and admission was 12.4 hours (range, 2-72 hours). The tibial distal medial articular surface collapse was found in 7 cases by CT examination and in 3 cases by X-ray film. Of 21 cases, there were 12 cases of low transverse fractures of lateral malleolus, 7 cases of short oblique fractures of lateral malleolus, and 2 cases of ankle joint lateral collateral ligament injury without fractures of lateral malleolus. After operation, the clinical outcome was evaluated according to the talus-leg angle, the recovery of Coin-sign continuity, inside-outside and top ankle gap, talus slope, American Orthopedic Foot and Ankle Society (AOFAS) score, Olerud-Molander score, Kofoed evaluation standards, and patient satisfaction.
  
  
  RESULTS
  Seventeen cases were followed up 18.7 months on average (range, 12-25 months). Primary healing was obtained in 16 cases except 1 case of delayed healing. Fracture healed at an average of 14.6 weeks (range, 12-16 weeks). All cases achieved anatomical reduction, the continuity of Coin-sign, and consistency of inside and outside joint gap; no talus tilt occurred. There was no complication of reduction loss, loosening or breakage of internal fixation, or osteoarthritis during follow-up. The talus-leg angle of the affected side was significantly improved to (83.4 ± 1.8)° at 1 week after operation from preoperative (74.8 ± 7.1)° (t = 5.370, P = 0.000), but no significant difference was found when compared with normal side (83.8 ± 2.3)° (t = 0.676, P = 0.509). The AOFAS score, Olerud-Molander score, and range of motion at 1 week, 3 months, and 1 year after operation were significantly improved when compared with preoperative ones (P < 0.05). According to Kofoed evaluation standard, the outcome was excellent in 15 cases and good in 2 cases; the excellent and good rate was 100%. According to patient satisfaction, the outcome was excellent in 13 cases, good in 3 cases, and poor in 1 case; the excellent and good rate was 94.1%.
  
  
  CONCLUSIONS
  The use of lateral malleolus hook-plate for fixation of stage II supination-adduction type medial malleolus fracture not only can effectively maintain anatomical reduction and supporting function, but also can prevent re-collapsing of the reset joint surface. The surgical method can not increase soft tissue complication, so it is a safe and effective method.
authors.forename: Yu
authors.initials: Y
authors.lastname: Chen
authors.forename: Hui
authors.initials: H
authors.lastname: Zhang
authors.forename: Fuguo
authors.initials: F
authors.lastname: Huang
authors.forename: Zhuo
authors.initials: Z
authors.lastname: Xiang
authors.forename: Yue
authors.initials: Y
authors.lastname: Fang
authors.forename: Lei
authors.initials: L
authors.lastname: Liu
authors.forename: Shiqiang
authors.initials: S
authors.lastname: Cen
mesh_terms: D000328:Adult; D000368:Aged; D064386:Ankle Fractures / Q000601:surgery*; D016512:Ankle Injuries / Q000601:surgery*; D000843:Ankle Joint / Q000601:surgery*; D001860:Bone Plates; D004838:Epiphyses; D005260:Female; D005360:Fibula; D005593:Fracture Fixation, Internal / Q000379:methods*; D050723:Fractures, Bone; D006801:Humans; D008297:Male; D008866:Microsurgery; D008875:Middle Aged; D016059:Range of Motion, Articular; D013484:Supination; D013628:Talus; D013639:Tarsal Bones; D016896:Treatment Outcome