Tsai YL, Tsao JP, Wang CL, Grodin E, et al. Stability of contour augmentation of implant-supported single crowns in the
esthetic zone: One-year cone-beam computed tomography results of a comparative,
randomized, prospective, two-center clinical study using two different bone
grafting techniques J Periodontol 2022;93:1661-1670.
PMID: 35506299