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After turning, the abutment appears to be completely seated (Fig.15 (3 years post cementation), as compared to Fig.11 (both bitewing)). 远中间隙还不够，第一基台可能还没有完全被动就位，第二，邻面大一些间隙容易让取模材料进入邻面，包绕牙冠
Xin Wei, DDS, PhD, MS 1st edition 03/08/2021, last revision 03/13/2021