title: Tibial Plateau Fracture Characteristics: Computed Tomography Mapping of Lateral, Medial, and Bicondylar Fractures.
abstract: BACKGROUND
  Computed tomography (CT) is seen as a useful diagnostic modality in preoperative planning for tibial plateau fractures. The purpose of this study was to characterize patterns of tibial plateau fractures with use of CT mapping. We hypothesized that CT mapping of fractures of the tibial plateau would reveal recurrent patterns of fragments and fracture lines, including patterns that do not fit into Schatzker's original classification.
  
  
  METHODS
  One hundred and twenty-seven tibial plateau fractures were retrospectively included in this study. Fracture lines and zones of comminution were graphically superimposed onto an axial template of an intact subarticular tibial plateau to identify major patterns of fracture and comminution. This fracture map of the tibial plateau was subsequently divided into lateral (Schatzker types I, II, and III), medial (Schatzker type IV), and bicondylar (Schatzker types V and VI) fracture maps.
  
  
  RESULTS
  This study included seventy-three female and fifty-four male patients (average age, forty-seven years [range, seventeen to ninety-one years]) with a tibial plateau fracture. Sixty-four of the fractures were Schatzker type I, II, or III; fifteen were Schatzker type IV; and forty-eight were Schatzker type V or VI. Analysis of the fracture maps suggested patterns in the Schatzker type-IV, V, and VI fractures beyond those described in Schatzker's original classification. The maps of the 127 fractures revealed four recurrent major fracture features: the lateral split fragment (A), found in 75%; the posteromedial fragment (B), seen in 43%; the tibial tubercle fragment (C), seen in 16%; and a zone of comminution that included the tibial spine and frequently extended to the lateral condyle (D), seen in 28%.
  
  
  CONCLUSIONS
  Tibial plateau fracture maps show recurrent patterns of fracture lines, revealing four major fracture characteristics. An understanding of these recurrent features of tibial plateau fractures can aid surgeons during diagnosis, preoperative planning, and execution of surgical strategies.
authors.affiliation: Orthotrauma Research Center Amsterdam, Academic Medical Center, Meibergdreef 9, 1100 DD Amsterdam, the Netherlands. E-mail address for J.N. Doornberg: jobdoornbergortho@gmail.com.
authors.forename: Rik J
authors.initials: RJ
authors.lastname: Molenaars
authors.affiliation: Department of Orthopaedic Surgery, Massachusetts General Hospital, 55 Fruit Street, Yawkey Center, Suite 2100, Boston, MA 02114.
authors.forename: Jos J
authors.initials: JJ
authors.lastname: Mellema
authors.affiliation: Orthotrauma Research Center Amsterdam, Academic Medical Center, Meibergdreef 9, 1100 DD Amsterdam, the Netherlands. E-mail address for J.N. Doornberg: jobdoornbergortho@gmail.com.
authors.forename: Job N
authors.initials: JN
authors.lastname: Doornberg
authors.affiliation: Orthotrauma Research Center Amsterdam, Academic Medical Center, Meibergdreef 9, 1100 DD Amsterdam, the Netherlands. E-mail address for J.N. Doornberg: jobdoornbergortho@gmail.com.
authors.forename: Peter
authors.initials: P
authors.lastname: Kloen
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001858:Bone Nails; D001860:Bone Plates; D015331:Cohort Studies; D005260:Female; D005500:Follow-Up Studies; D005593:Fracture Fixation, Internal / Q000379:methods*; D017102:Fracture Healing / Q000502:physiology; D006801:Humans; D007091:Image Processing, Computer-Assisted; D021621:Imaging, Three-Dimensional; D015601:Injury Severity Score; D057072:Intra-Articular Fractures / Q000000981:diagnostic imaging* / Q000503:physiopathology / Q000601:surgery; D007719:Knee Joint / Q000000981:diagnostic imaging / Q000601:surgery; D008297:Male; D008875:Middle Aged; D009426:Netherlands; D011300:Preoperative Care / Q000379:methods; D012189:Retrospective Studies; D013978:Tibial Fractures / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D014057:Tomography, X-Ray Computed / Q000379:methods*