Acrylic dressing holding the PRF membranes in place remains in situ with the healthy gingiva buccal (Fig.9) and palatal (Fig.10) 11 days postop.  Note the acrylic locking into the undercuts of the neighboring teeth (*).术后用树脂材料（取代牙周敷料，稳定性更好）固定血小板膜，图九，十：术后十一天，树脂进入邻牙倒凹（*）起固位作用。

Immediate Repair     Last     Next  Xin Wei, DDS, PhD, MS 1st edition 07/14/2020, last revision 11/29/2020