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The Inferior Alveolar Canal (IAC, Fig.3 yellow dashed line) is barely identified. To avoid complication, an implant is to be confined to boundary of the socket (7x14 mm). No drill is to be used.
A 5x14 mm tap is inserted without stability, whereas a 6x14 mm one establishes initial stability (apparently in its apex). When a 7x14 mm tap is placed, stability is satisfactory; the tap almost obliterates the socket (Fig.4 T).
Xin Wei, DDS, PhD, MS 1st edition 11/25/2014, last revision 11/26/2014