After extraction, the septum is confirmed to be short and thin.  The bone density is moderate.  When a 3.5 mm drill is being used, the osteotomy perforates into the mesiobuccal socket.  A 5x10 mm IS implant achieves minimal stability.  As 5.5, 6.0 and 7.0 mm cortical taps are inserted, primary stability is not obtained, as more bone is being removed at the level of the septum.  When a 7x17 mm Tatum tapered tap is placed, it looks too small for the socket, as confirmed by measurement of a preop PA (Fig.2).  Chronic infection associated with crack syndrome for 2 years may cause bone loss of the socket walls.

Switch from IS to Tatum Implant Last Next

Xin Wei, DDS, PhD, MS 1st edition 05/07/2018, last revision 10/07/2018