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CT scan without contrast showed signs of right maxillary sinusitis and confirmed the misplacement of four dental implants that surfaced into the nasal cavities. The imaging also revealed the presence of another implant that emerged inside the maxillary sinus. The patient underwent functional endoscopic sinus surgery with complete symptom remission at the long\u2010term follow\u2010up. We propose that sinusitis caused by protrusion of implants and by sinus floor lift procedures could share common physiopathological patterns and predisposing factors.<\/jats:p>","DOI":"10.1111\/jopr.12123","type":"journal-article","created":{"date-parts":[[2014,1,13]],"date-time":"2014-01-13T22:27:54Z","timestamp":1389652074000},"page":"227-231","source":"Crossref","is-referenced-by-count":29,"title":["Maxillary Sinusitis Caused by Dental Implants Extending into the Maxillary Sinus and the Nasal Cavities"],"prefix":"10.1111","volume":"23","author":[{"given":"Matteo","family":"Biafora","sequence":"first","affiliation":[{"name":"Department of Otorhinolaryngology San Raffaele Scientific Institute  Milan Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Giacomo","family":"Bertazzoni","sequence":"additional","affiliation":[{"name":"Department of Otorhinolaryngology San Raffaele Scientific Institute  Milan 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