In order to rotate the buccal block easier (Fig.6 pink curved arrow), the apical transverse cut will be wedge in shape (Fig.6 (red), 6' (double lines), 7 (black)).   In the 2nd stage, the ridge top split will be extended by using a chisel (Fig.7 longer red line) and the buccal block will be pushed buccally (Fig.8).  A guide will be seated to finish osteotomy (Fig.9 white) and implant placement. 

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Xin Wei, DDS, PhD, MS 1st edition 05/02/2020, last revision 05/02/2020