Vital root retention.
D000539:Alveolar Process / Q000502:physiology*; D001862:Bone Resorption / Q000517:prevention & control*; D006801:Humans; D008297:Male; D008875:Middle Aged; D013516:Oral Surgical Procedures, Preprosthetic / Q000379:methods; D014092:Tooth Root / Q000502:physiology* / Q000601:surgery