Periapical Microsurgery: A 4-D Analysis of Healing PatternsOR56Crossen, D.Tawil, P.Morelli, T.Tyndall, D.Author informationUniversity of North Carolina, North CarolinaJournal of Endodontics 44(3):p e15, March 2018.Copyright ©2018The American Association of Endodontists