title: PERPENDICULAR DOUBLE-PLATE FIXATION WITH LOCKING SYSTEM FOR ACROMION PEDICLE FRACTURE.
abstract: OBJECTIVE
  : To describe the surgical technique and preliminary clinical outcomes in a series of open reduction internal fixation of basal acromion process fractures applying a double-plating technique.
  
  
  METHODS
  : Nine consecutive patients, mean age 33.4 years old (range, 23-61 years old) with unilateral acromion fracture (Type 3 AO/OTA) with more than 1cm displacement who underwent fixation utilizing a locked double-plating technique, were evaluated on average at 7.8 months (range, 3-15 months) for outcomes related to pain, shoulder function, and surgical complications.
  
  
  RESULTS
  : Eight patients recovered with complete radiographic union and favorable shoulder function. One case failed to be fully evaluated for more than 3 months follow-up. The overall scores of Constant, Shoulder Pain and Disability Index (SPADI) and DASH for the eight patients reviewed were 91.9± 6.31, 3.11± 3.79 and 5.2± 6.35, respectively. No post-operative infection or surgical hardware irritation was identified at final follow-up of these eight patients.
  
  
  CONCLUSIONS
  : While more evidence is needed to justify its advantages over traditional implants, perpendicular double-plate with a locking system may be indicated for acromion pedicle fracture treatment, since it performed well for fracture healing and joint function rehabilitation. Level of Evidence IV, Therapeutic Study.
authors.affiliation: . Zhejiang University, the Second Affiliated Hospital, Orthopedics Department, Hangzhou, Zhejiang Province, China.
authors.forename: Junkun
authors.initials: J
authors.lastname: Zhu
authors.affiliation: . Zhejiang University, the Second Affiliated Hospital, Orthopedics Department, Hangzhou, Zhejiang Province, China.
authors.forename: Zhijun
authors.initials: Z
authors.lastname: Pan
authors.affiliation: . Zhejiang University, the Second Affiliated Hospital, Orthopedics Department, Hangzhou, Zhejiang Province, China.
authors.forename: Rongzong
authors.initials: R
authors.lastname: Zheng
authors.affiliation: . Zhejiang University, the Second Affiliated Hospital, Orthopedics Department, Hangzhou, Zhejiang Province, China.
authors.forename: Shuhua
authors.initials: S
authors.lastname: Lan
keywords: Acromion; Fracture Fixation, Internal; Fractures, bone