Following trajectory confirmation (Fig.2), a 2.5x12(2) mm implant is placed a little deeper than expected to ensure no implant thread exposure with bone graft (Fig.3).  The threads appears to be covered by the bone or bone graft 4 months postop (Fig.6).

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Xin Wei, DDS, PhD, MS 1st edition 12/06/2019, last revision 12/06/2019