The guide is reseated for final drilling until 3.5x10 mm. The buccal plate starts to fracture when a 4x10 mm IS dummy implant is being inserted; the fracture gets worse when a 4.5x10 mm final UF implant is placed (Fig.4 ^).
Xin Wei, DDS, PhD, MS 1st edition 08/24/2019, last revision 08/25/2019