Sticky bone is placed, followed by 2 pieces of PRF membranes, 4-0 PGA sutures (Fig.3) and periodontal dressing.  即刻植骨，sticky bone, 放置两张prf膜。还有什么值得改进呢？20200717

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Xin Wei, DDS, PhD, MS 1st edition 03/09/2020, last revision 07/18/2020