title: Complications of Zygomatic Implants: Our Clinical Experience with 4 Cases.
abstract: Zygomatic implants have been used for rehabilitation of the edentulous atrophic maxilla as an alternative to bone grafting for almost two decades resulting in satisfactory clinical outcomes. However, the patients with edentulous atrophic maxilla treated using this technique may present serious complications that could put the prosthetic restoration at risk. Four cases are reported in this paper, one case with a cutaneous fistula in the left zygomatic-orbital area caused by aseptic necrosis at the apical part of the implant, which was treated with the surgical removal of this part, a second case with loss of the right zygomatic implant due to failure of osseointegration and two cases of periimplantitis that resulted in partial and complete removal of the implant, respectively. All patients who had complications were treated without compromising the restoration which remained functional after appropriately modified treatment.
authors.affiliation: Department of Oral & Maxillofacial Surgery (Head: Professor Iatrou I.), Dental School  of Athens, National and Kapodistrian University of Athens, Greece.
authors.forename: Fotios
authors.initials: F
authors.lastname: Tzerbos
authors.affiliation: Department of Oral & Maxillofacial Surgery (Head: Professor Iatrou I.), Dental School  of Athens, National and Kapodistrian University of Athens, Greece.
authors.forename: Fotios
authors.initials: F
authors.lastname: Bountaniotis
authors.affiliation: Department of Oral & Maxillofacial Surgery (Head: Professor Iatrou I.), Dental School  of Athens, National and Kapodistrian University of Athens, Greece.
authors.forename: Nadia
authors.initials: N
authors.lastname: Theologie-Lygidakis
authors.affiliation: Private practice, Athens, Greece.
authors.forename: Dimitrios
authors.initials: D
authors.lastname: Fakitsas
authors.affiliation: Private practice, Athens, Greece.
authors.forename: Ioannis
authors.initials: I
authors.lastname: Fakitsas
keywords: Atrophy; Dental Implants; Jaw, Edentulous; Maxilla; Oral Fistula; Peri-Implantitis; Zygoma