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After mesial sheath preparation, insert a guide to finish osteotomy and 4x9 mm dummy implant (Fig.7' green). Remove the guide to check the relationship between the implant and the sheath. If needed, remove the middle of the sheath (Fig.7" *).
Xin Wei, DDS, PhD, MS 1st edition 05/08/2020, last revision 05/10/2020