title: [Marginal impaction in acetabular fractures].
abstract: OBJECTIVE
  To understand the diagnosis and treatment of marginal impaction of acetabular fractures.
  
  
  METHODS
  Eighteen of 26 patients with marginal impaction of acetabular fractures were retrospectively reviewed. Marginal impactions was confirmed in 15 patients by CT scan before operation, and in 3 during operation. All patients were treated by ORIF, and the impacted bones were elevated with bone grafts (Bone graft was not used in one patient). All fractures were fixed with a reconstruction plate.
  
  
  RESULTS
  The mean follow up was 36.7 months (5 - 71 months). The modified D'Aubingne and Postel score system showed excellent results in 6 patients, good 7, fair 2, and poor 3.
  
  
  CONCLUSIONS
  Posterior fractures and dislocations of acetabular fractures are easily combined with marginal impaction, and can diagnosed by CT scan. Cortical impaction should be recognized as a special type. The impacted bone should be elevated for bone grafting.
authors.affiliation: Department of Orthopaedic and Traumatology, Beijing Jishuitan Hospital, Beijing 100035, China.
authors.forename: Xin-bao
authors.initials: XB
authors.lastname: Wu
authors.forename: Man-yi
authors.initials: MY
authors.lastname: Wang
authors.forename: Shi-wen
authors.initials: SW
authors.lastname: Zhu
authors.forename: Qi-yong
authors.initials: QY
authors.lastname: Cao
authors.forename: Hong-hua
authors.initials: HH
authors.lastname: Wu
mesh_terms: D000077:Acetabulum / Q000293:injuries*; D000328:Adult; D001860:Bone Plates; D016025:Bone Transplantation; D005260:Female; D005500:Follow-Up Studies; D005593:Fracture Fixation, Internal; D050723:Fractures, Bone / Q000000981:diagnostic imaging / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012189:Retrospective Studies; D015898:Tomography Scanners, X-Ray Computed