Crestal bone resorption during the healing period of guided bone regeneration with simultaneous implant placement in anterior aesthetic area: a prospective clinical study
ZHANG Chu-nan, MO Jia-ji, QIAO Shi-chong, NI Jie, WANG Bei, GU Ying-xin.
China Journal of Oral and Maxillofacial Surgery . 2017, (5): 416 -421 .  DOI: 10.19438/j.cjoms.2017.05.008