After extraction of #23, osteotomies are initiated at #23 and 26 with 1.5 and 1.2 mm drills (12 mm deep, Fig.2).  It appears that the osteotomy at #23 is close to the neighboring tooth (*).  Lindermann bur is used to mesialize the osteotomy before placing 3x16(4) and 2.5x14(4) mm 1-piece implants with bone graft (Fig.3 *>). 

1-Piece Implant

Xin Wei, DDS, PhD, MS 1st edition 09/01/2016, last revision 09/01/2016