After extraction of the oval-shaped residual roots at #12 (Fig.1), osteotomy is initiated in the palatal socket for 18 mm; since the root of the canine curves distal (Fig.2 red dashed line), the osteotomy cannot afford to move mesial and extend more apical.  A 3.8x15 mm implant is placed with > 50 Ncm (Fig.3).  With immediate placement of a 4.5x4(3) mm abutment, an immediate provisional is fabricated to close the sockets (Fig.4 P).  The implant seems to be osteointegrated 3 months postop (Fig.7).

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Xin Wei, DDS, PhD, MS 1st edition 12/01/2017, last revision 11/10/2018