Bone geometry following DFO suggests that the medial biplanar closed-wedge technique simultaneously creates smaller wedge volume and larger bone surface areas compared to the lateral biplanar open-wedge and the uniplanar DFO techniques. The horizontal cuts of the biplane DFO techniques are positioned behind the trochlear area in better healing metaphysial bone, which further enhances bone healing potential. Although this idealized geometric view on bony geometry excludes all biological factors that influence bone healing, the current data confirm the general rule for osteotomy techniques: reducing the amount of slow gap healing and wedge volumes and simultaneously increasing the area of faster contact healing by larger bone surface areas may be beneficial for osteotomy healing.
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