Barely Penetrate Sinus Floor

A 29-year-old woman requests implant for the residual root of the tooth #4 after initial RCT in home country (Fig.1,2 (S: sinus)).  It appears that a 15 or 16 mm long implant should be placed to engage into the apical native bone and sinus floor (*) for stability (Fig.3,4).  Further stability is obtained by contact with the mesial (M), distal (D) wall or both.

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Xin Wei, DDS, PhD, MS 1st edition 06/14/2021, last revision 07/01/2021