Survival Rate and Bone Resorption in Immediate Loading of Atrophic Maxillary Arches Using Normal and Long Implants: A Pilot Observational Study.

Purpose: To estimate implant survival and peri-implant bone resorption around long vs normal-length implants in full-arch immediate loading rehabilitation of maxillary arches of low bone quality (D4).

Materials And Methods: A total of 45 patients received two mesial normal-length (10 to 15 mm) or longer (18 to 20 mm) implants and two long (18 to 20 mm) distally tilted implants. Differences in bone resorption at 24 months were assessed using the Mann-Whitney U Test.