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The patient is ready for the 3rd placement 1 year 5 months post last implant removal (Fig.12). The bone is 1.8 mm thick, apparently composing of 2 fused cortical plates. Make an incision for both external and internal sinus lift with retraction. Find the old guide to start osteotomy including bone trimmers and use Magic Lifter. If the membrane is broken, open the lateral window to repair with PRF.
Xin Wei, DDS, PhD, MS 1st edition 04/09/2021, last revision 04/11/2021