CT taken 3 years 10 months post cementation shows the intact buccal plate (Fig.22,23 B).  The apparent thread exposure shown in 3-D image (upper left of Fig.22 *) is due to low bone density in the axial section (upper right of Fig.22 *).

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Xin Wei, DDS, PhD, MS 1st edition 05/11/2019, last revision 05/11/2019