Fig.2: The 7x11 mm implant (apical diameter 5 mm) is unstable.  It is 4 mm from the inferior alveolar canal.  At least 2 mm new bone can be gained for 2nd placement of a longer implant or wider.

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Xin Wei, DDS, PhD, MS 1st edition 07/25/2013, last revision 07/25/2014