Fig.3: Preop PA is used to measure the bone height at the site of the tooth #31 (12.93 mm).   The length of the implant will be 10 mm.  But the initial osteotomy depth will be 8 mm.  Red line: the upper border of the inferior alveolar nerve canal.

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Xin Wei, DDS, PhD, MS 1st edition 04/04/2013, last revision 04/05/2014