Although a 5x7.3 mm implant fits the site by design (Fig.4), a much longer implant is required to achieve primary stability past the sinus floor using IBS Magic Expanders (Fig.5,6 (20-30 Ncm)).  In contrast, primary stability could not be obtained by engaging dummy implant to the socket walls.  A short implant without sinus lift is associated with less obvious complication such as fibrointegration.  The abutment will be rotated prior to impression.  The implant seems osteointegrated 4.5 months postop (Fig.7).  The abutment is changed to 6.5x4(5) mm before impression.

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Xin Wei, DDS, PhD, MS 1st edition 11/29/2018, last revision 06/16/2019