title: Locking plate in proximal tibial fracture: a correlation between the coronal alignment of tibia and joint screw angle.
abstract: OBJECTIVE
  The purpose of this study is to evaluate the relationship between the angle formed between the proximal most screw through the locking compression plate-proximal lateral tibia (LCP PLT) and the joint line, and to evaluate if this angle can be used intraoperatively as an assessment tool to determine normal alignment of the tibia in the coronal plane.
  
  
  METHODS
  There are two parts to this study: in the first part, LCP PLT was applied to 30 cadaveric adult tibia. The angle between the joint line and the proximal most screw was measured and termed as the 'joint screw angle' (JSA). In the second part, 56 proximal tibial fractures treated with LCP PLT were retrospectively studied. Two angles were measured on the radiographs, the medial proximal tibial angle (MPTA) and the JSA. Their relationship was analyzed statistically.
  
  
  RESULTS
  The average JSA was 1.16 degrees in the anatomical study. Statistical analysis of the clinical study showed that the normal MPTA had a direct correlation with an acceptable JSA.
  
  
  CONCLUSIONS
  We therefore conclude that the JSA can be used intraoperatively to assess the achievement of a normal coronal axis.
authors.affiliation: Department of Orthopaedic Surgery, Korea University School of Medicine, Guro Hospital, Seoul, Korea.
authors.forename: Jong-Keon
authors.initials: JK
authors.lastname: Oh
authors.forename: Jin-Ho
authors.initials: JH
authors.lastname: Hwang
authors.forename: Lalrinliana
authors.initials: L
authors.lastname: Varte
authors.forename: Jae-Han
authors.initials: JH
authors.lastname: Ko
authors.forename: Chang-Wug
authors.initials: CW
authors.lastname: Oh
authors.forename: Duk-Young
authors.initials: DY
authors.lastname: Jung
authors.forename: Hyonggin
authors.initials: H
authors.lastname: An
authors.forename: Jae-Woo
authors.initials: JW
authors.lastname: Cho
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001863:Bone Screws; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D019637:Orthopedic Procedures / Q000379:methods*; D011859:Radiography; D012189:Retrospective Studies; D013978:Tibial Fractures / Q000000981:diagnostic imaging / Q000601:surgery*
keywords: Proximal tibial fracture; locking plate; tibial coronal alignment
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