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    Classificação de O´Driscoll para fratura do processo coronóide: odriscoll

    • O’Driscoll et al.80 introduced a more comprehensive classification system
      that included fracture size, anatomic location, and mechanism of injury. This
      system is divided into three types. Type I fractures involve the coronoid tip
      and are divided into two subtypes based on size. Subtype I are tip fractures
      less than 2 mm, while subtype II are larger than 2 mm, but less than 50% of
      the coronoid height. Type II fractures involve the anteromedial facet and are
      divided into three subtypes. Subtype I involves the rim only, subtype II involves the rim and tip, and subtype III involves the
      rim, and sublime tubercle, with or without involvement of the tip. Type III fractures include the coronoid base and consist of
      two subtypes. Subtype I comprises body and basal fractures while subtype II includes the former in addition to a transolecranon
      fracture (Fig. 34-15).
      O’Driscoll Type I coronoid tip fractures are typically associated with fractures of the radial head and a concomitant elbow
      dislocation, the “terrible triad” injury of the elbow. These injuries typically occur with a PLRI mechanism, shearing off the
      anterolateral radial head and coronoid tip while dislocating. Type II anteromedial coronoid fractures are seen with
      posteromedial rotatory instability (PMRI) and are almost always have a concomitant avulsion of the LCL. Type III basal
      coronoid fractures are most commonly associated with fractures of the olecranon and proximal ulna and have a more direct
      posterior injury mechanism. They typically have larger fractures of the radial head and less ligamentous injuries. The
      management of coronoid fractures is best understood by considering the patterns of injury rather than focusing on the isolated
      treatment of the coronoid

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