Finally 2 pieces of PRF membranes are utilized to facilitate repair of the buccal soft tissue defect (Fig.7 *).    最后两片PRF膜（图七*）植入充填颊侧牙龈萎缩，服服帖帖，形态颜色与牙龈那么匹配。

Immediate Repair     Last     Next    术后6个月  一段式植体边缘制备

Xin Wei, DDS, PhD, MS 1st edition 07/03/2020, last revision 01/24/2021