A 40-year-old man (smoker, 1ppd) is concerned about #31 mobility (Fig.1).  Gross debridement is finished in his 1st appointment, while impression is taken for guide in his 2nd one. SRP has been scheduled for lower right quadrant with #31 extraction and immediate implant (Fig.2).  The tooth #17 extraction will be postponed.  The extraction may lead to mobility of the tooth #18, although SRP for the other 3 quadrant will be scheduled 1 week post #31 surgery.  Smoke reduction is encouraged.  The single-rooted tooth #31 is being lost earlier than the double-rooted one (#18（1）).

SRP 第二磨牙即种 Last Next  #31 手术 最终结果  Xin Wei, DDS, PhD, MS 1st edition 07/26/2019, last revision 04/27/2021