Brief Clinical StudiesSinusitis Due to the Presence of a Dental Implant Inside the Maxillary SinusConforte, Jadison Junio MS*; Ponzoni, Daniela PhD†Author Information *Department of Dental Materials and Prosthodontics †Department of Surgery and Integrated Clinics, Faculty of Dentistry of Araçatuba, UNESP, São Paulo, Brazil. Address correspondence and reprint requests to Jadison Junio Conforte, MS, Department of Dental Prosthesis, Araçatuba School of Dentistry, UNESP, Rua José Bonifácio, 1193 CEP 16015-050, São Paulo, Brazil; E-mail: firstname.lastname@example.org Received 19 February, 2018 Accepted 2 April, 2018 The authors report no conflicts of interest. Journal of Craniofacial Surgery: September 2018 - Volume 29 - Issue 6 - p e591 doi: 10.1097/SCS.0000000000004668 Buy Metrics Abstract The migration of a dental implant into the maxillary sinus is an uncommon event of occurrence. Disrespect for concepts of implantology, low alveolar bone density at the site, high incidence of masticatory force in posterior region, and clinical intercurrences predispose to failure in rehabilitation. © 2018 by Mutaz B. Habal, MD.