Gameiro, PedroSaldanha, BernardoSantos, FranciscoSilva, JéssicaNorte, JoãoReis, JoãoSottomayor, PedroVaz, RodolfoRodrigues, Pedro2022-05-182022-05-182021Gameiro P, Saldanha B, Santos F, Silva J, Norte J, Reis J, Sottomayor P, Vaz R, Rodrigues P. External Approach to Bilaterally Septated Maxillary Sinuses: A Case Report. Medical Sciences Forum. 2021; 5(1):35. https://doi.org/10.3390/msf2021005035978-3-0365-2238-8978-3-0365-2237-12673-9992http://hdl.handle.net/10400.26/40626Communication abstract: Proceedings of the 5th International Congress of CiiEM - Reducing inequalities in Health and Society, held at Egas Moniz’ University Campus in Monte de Caparica, Almada, from June 16th to 18th, 2021.This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.The careful planning of a sinus lift procedure is the key to avoiding surgical complications. In this clinical case, a female patient, 59 years old and totally edentulous in the maxilla, was referred to Egas Moniz’s Dental Clinic Implantology consultation with indication for bilateral external sinus lift of the maxillary sinuses prior to implant placement. Both orthopantomography and cone-beam computed tomography were used to show the anatomy of the maxillary sinuses, which presented multiple sinus septa. A multiple anterolateral window approach was applied in order to avoid perforation of the Schneiderian membrane while accessing it.engSinus septaMaxillary sinusSchneiderian membraneExternal elevation of the maxillary sinusOral surgeryjournal article10.3390/msf2021005035