Fig.2: CBCT coronal section at the site of the tooth #14.  Arrowhead (<): lateral wall of the maxillary sinus; arrow (->): sinus membrane.

Below the crest of the edentulous area is a radiographic stent fabricated with Barium Sulphate.  The empty space inside the stent is for initial osteotomy.

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Xin Wei, DDS, PhD, MS 1st edition 04/18/2014, last revision 04/20/2014