The patient reports loss of a piece of material 8 days postop.  It must be the additional acrylic, since it is absent 6 weeks postop (Fig.5).  The provisional (Fig.5 P) looks wide, probably related to post-extraction gingiva and bone atrophy (Fig.6, 7 *). 

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Xin Wei, DDS, PhD, MS 1st edition 01/02/2020, last revision 01/02/2020