Angulated screw channel restored with monolithic zirconia vs. porcelain-fused-to zirconia implant crowns: a prospective clinical trial in split-mouth design
YANG Lu-peng, FAN Lin-feng, SHI Jun-yu, ZHANG Xiao, GU Ying-xin, ZHANG Chu-nan
China Journal of Oral and Maxillofacial Surgery . 2021, (3): 222 -225 .  DOI: 10.19438/j.cjoms.2021.03.007