title: Computer-Aided Rehabilitation of Maxillary Oncological Defects Using Zygomatic Implants: A Defect-Based Classification.
abstract: OBJECTIVE
  A complete maxillectomy for neoplastic lesions leads to serious oral dysfunction. Zygomatic implants for fixed bridge support are considered beneficial for maxillary defects after tumor resection.
  
  
  METHODS
  This clinical study examined the management of patients with different maxillary defect types who underwent delayed rehabilitation using zygomatic implants and immediate prosthetic loading. Virtual preoperative planning and intraoperative navigation were performed in all cases.
  
  
  RESULTS
  Five patients were treated with this new method. The total number of zygomatic implants positioned was 17. Four patients had immediate loading of a fixed prosthesis and 1 had delayed loading. One patient had 1 failed implant.
  
  
  CONCLUSIONS
  The use of preoperative virtual surgical planning and an intraoperative navigation system allows the surgeon to achieve safer implant positioning in a complex anatomic site. A systematic bone defect classification was created and a specific treatment protocol is proposed for each type of defect.
authors.affiliation: PhD Student, Oral and Maxillofacial Surgery Division, Department of Biomedical and Neuromotor Sciences, University of Bologna, Italy.
authors.forename: Gerardo
authors.initials: G
authors.lastname: Pellegrino
authors.affiliation: Assistant Professor, Oral and Maxillofacial Surgery Division, Department of Biomedical and Neuromotor Sciences, University of Bologna, Italy. Electronic address: achille.tarsitano2@unibo.it.
authors.forename: Achille
authors.initials: A
authors.lastname: Tarsitano
authors.affiliation: Adjunct Professor, Oral and Maxillofacial Surgery Division, Department of Biomedical and Neuromotor Sciences, University of Bologna, Italy.
authors.forename: Francesco
authors.initials: F
authors.lastname: Basile
authors.affiliation: Adjunct Professor, Oral and Maxillofacial Surgery Division, Department of Biomedical and Neuromotor Sciences, University of Bologna, Italy.
authors.forename: Angelo
authors.initials: A
authors.lastname: Pizzigallo
authors.affiliation: Full Professor, Oral and Maxillofacial Surgery Division, Department of Biomedical and Neuromotor Sciences, University of Bologna, Italy.
authors.forename: Claudio
authors.initials: C
authors.lastname: Marchetti
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D003758:Dental Implantation, Endosseous / Q000379:methods*; D017267:Dental Prosthesis Design / Q000379:methods; D019094:Dental Prosthesis, Implant-Supported; D019232:Dental Restoration Failure; D006801:Humans; D008437:Maxilla / Q000601:surgery*; D008441:Maxillary Neoplasms / Q000601:surgery*; D008875:Middle Aged; D011788:Quality of Life; D025321:Surgery, Computer-Assisted / Q000379:methods*; D015050:Zygoma / Q000601:surgery*