For the maxillary sinus to normally function, the ventilation and drainage should be well maintained. The natural ostium of the maxillary sinus could be blocked owing to various reasons. In this condition, recurrence is likely to occur although the cause of maxillary sinusitis is treated. In this study, patients with chronic maxillary sinusitis were subjected to preoperative computed tomography. Overall, 11 patients with natural ostium obstruction and nasal septum deviation were examined and underwent otorhinolaryngological surgeries such as functional endoscopic sinus surgery and septoplasty. Of the 11 patients who exhibited complete healing after maxillary sinus treatment, 13 implants were placed in 5 patients. The average follow-up period was 5 years except for 2 patients who were lost to follow-up after prosthetic delivery or repeatedly exhibited failure for osseointegration. The success and survival rates of 9 of 11 patients were 100%, with no marginal bone loss.