Fig.2 (CT sagittal section): Three bone level implants are going to be placed at the sites of #13,14, and 15 with sinus lift (crestal approach). Bone graft is to be done at #14, whereas it is not necessary for the other two.
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Xin Wei, DDS, PhD, MS 1st edition 01/12/2013, last revision 01/15/2014