Since the ridge is narrow at #19 and 20 (Fig.3), ridge split at #19 and a 1-piece implant at #20 are planned (Fig.4,5-9).  The implant at #19 will be placed in an ideal prosthetic position with guide (Fig.5). 

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Xin Wei, DDS, PhD, MS 1st edition 05/02/2020, last revision 05/03/2020