The last drill will be 3.5x8.5 mm (undersized) to improve stability.  If there is no pain, 3.5x10 mm one will be used for a 4.5x10 mm implant.  Use 4 and 4.5 mm taps.

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Xin Wei, DDS, PhD, MS 1st edition 09/23/2019, last revision 10/08/2019