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Sequential osteotomy stops one size smaller than the expected size of the implants (Fig.2): the last drills for the sites of 18 and 19 are 4.5x10 and 4.5x12 mm, respectively. Because of underprep, insertion torque for these two implants are around 55 Ncm.
Xin Wei, DDS, PhD, MS 1st edition 08/30/2015, last revision 12/26/2018