The purpose of this study was to characterize the long-term outcomes and efficacy of endoscopic sinus surgery for refractory CRS after sinus lift, including the ability to salvage dental implants.

This retrospective case series described nine patients who underwent endoscopic sinus surgery for CRS after a sinus lift procedure.

The majority of patients developed symptoms within three months of implant placement and were treated with at least three antibiotics courses before referral to an otolaryngologist. All the patients underwent wide endoscopic maxillary antrostomy, with no surgical complications or postoperative reports of infection. There was a statistically significant improvement in 22-item Sino-Nasal Outcome Test scores and discharge, inflammation, and polyps/edema endoscopic scores between pre-and post-surgical treatment. Four patients had their dental implants removed before the presentation. None of the five patients presented with intact dental implants required removal before or after functional endoscopic sinus surgery.

The study concluded that functional endoscopic sinus surgery was a reasonable and efficacious treatment option for patients who presented with paranasal sinus disease after a sinus lift. Dental implant removal may not be a requirement for the successful treatment of CRS associated with sinus lift procedures.