Bitewing is taken immediately before cementation to check open margin (Fig.5).  There is no leakage 2 years 8 months post cementation (Fig.6,7) or periapical radiolucency 6 years 3 months post RCT (Fig.8).  It appears that temp bond (light proximal contact) does not seal the marginal gap (Fig.6).

RCT F-U Last Next Xin Wei, DDS, PhD, MS 1st edition 11/24/2019, last revision 11/28/2019