Effects of Corticobasal Implant Protrusion inside the Nasal and Maxillary Sinus

Implant protrusion into the nasal and maxillary sinuses presents a challenge in cases of severely resorbed maxillae. The aim of this study was to evaluate the clinical and radiographic effects of BECES implant penetration depth into the nasal and maxillary sinuses. This was an observational study conducted in a tertiary institution. Forty-nine BECES implants were inserted into the maxilla of patients who presented with severely resorbed ridges but no history of sinusitis. Forty-five implants protruded into the sinus cavities. Patients were examined clinically and radiographically at 1 week and 3, 6, 12, and 18 months after insertion. Maxillary sinus health, survival and success rates, and peri-implant health were assessed using the plaque index (PI), calculus index, modified gingival index (MGI), and probing pocket depth (PPD). Wilcoxon signed-rank test and Mann-Whitney test were used in this study. Four (8.16%) of the 45 implants that penetrated the cavities reached the sinus floor without disrupting the membrane; the penetration depth was ≥4 mm in 20 implants (44.44%) and