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When the residual roots are removed, the socket is large, single and 11 mm deep. Tapered osteotomes (2, 3, 4 mm) are used to gain 3 mm new bone apically and lift the sinus floor. The osteotomy is further increased by using tapered taps (from 4.5 to 7 mm with increasing stability). Fig.1 shows a 5 mm tap in place, while Fig.2 the socket and the osteotomy (arrowheads) after osteotome and tap application. B: buccal; M: mesial; P: palatal.
Xin Wei, DDS, PhD, MS 1st edition 09/21/2015, last revision 09/22/2015