A 72-year-old man presents to clinic for implants because of pain associated with wearing the lower partial.  The teeth #21, 24, 25 and 31 seem to be non-salvageable and are going to be replaced by implants so that the lower RPD can be reused (Fig.1).

Long Implant for Lower 1st Premolar

Xin Wei, DDS, PhD, MS 1st edition 01/03/2017, last revision 01/03/2017