Bohler's angle

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- Discussion:
    - angle formed by intersection of line drawn from most cephalic point on tuberosity to highest point of posterior facet w/ line from latter to most cephalic part of posterior process of calcaneus;
            - measures height of the posterior facet;
    - normal range is 20-40 deg, hence comparison views of opposite calcaneus can be helpful;
    - decreased tuber angle;
          - in most cases, a decrease Bohler's angle implies fracture and disrupted of the posterior facet;
          - persistent, severe decreases ( < 0 deg) ofthe tuber angle has been assoc w/ poor long term results, while minor changes may or may not be assiocated w/ bad outcome