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Initial osteotomy depth is 18 mm (Fig.1 green line) with 9 mm in the native bone (red line). The bone density feels to be low. There is at least 2 more mm bone apically (pink line). The depth is increased by 2 mm next.
Xin Wei, DDS, PhD, MS 1st edition 02/03/2017, last revision 12/01/2020