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To overcome the deviation, the ridge has to be exposed by incision. The pointed ridge should be flattened using surgical bur (Fig.6), since the bone trimmer may wobble in the slope and cannot even the ridge. With surgical precision flattening with visual confirmation, the following osteotomy should be able to be maintained as straight as planned (Fig.7).
Xin Wei, DDS, PhD, MS 1st edition 06/11/2020, last revision 06/11/2020