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All of the 3 crowns are cemented in situ (Fig.11, 12) although the one at #14 is removed with the abutment for removal of residual cement. However, the implants at #15 and 18 appear to be placed distally with free-end guides (black lines).
Xin Wei, DDS, PhD, MS 1st edition 10/20/2020, last revision 10/20/2020