When implants at #4, 13 and 14 are placed, the patient wonders how many more implants are needed.  From 0 (considering a lower RPD) to 5 (#3, 19, 20, 25 and 30).  The tooth #3 seems to have periodontal-endodontic disease (Fig.1,2). 

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Xin Wei, DDS, PhD, MS 1st edition 05/02/2020, last revision 05/02/2020