Abstract: Objective To evaluate the curative effect, safety and degree of patients' accept of the sinus of balloon dilatation in the treatment of chronic maxillary sinusitis in. Methods 50 patients with chronic maxillary sinusitis were randomly divided into two groups on average: group A of 25 patients with sinus balloon dilatation and group B of 25 with maxillary sinus endoscopic operation. Results In examination and post-operative follow-up period of 1 year, there were 2 cases fell off in group A and 3 cases in group B. The 23 cases in group A and 22 cases in group B with clinical symptoms were significantly improved. Through post-operative nasal endoscopic examination, the group A's patency of maxillary sinus ostium maintained well in 30 cases, sinus stenosed in 1 case and sinus mucosa edema around in 2 cases; the group B's patency of maxillary sinus ostium maintained well in 27 cases, sinus stenosed in 2 cases and sinus mucosa edema around in 3cases. There were no post-operative complications of eyes and cerebrospinal fluid leak occurred in two groups. The grades of CT scores of post-operation 12months, and SNOT-20 of post-operative 3 months and 12 months had no significant differences between the group A and B. The Lund -Kennedy endoscopic mucosal morphology scores of post-operative 3 months and 12 months, and the comfort score (the day discharged from hospital after recovery) in group A were better than in group B(P<0.05). Conclusion The nasal endoscopic balloon dilatation and traditional functional endoscopic sinus surgery have the same therapeutic effect and safety in chronic maxillary sinusitis. But in aspect of long-term curative effect and operation comfort, balloon dilatation is better than traditional nasal endoscopic sinus surgery and worthy of clinical popularization and application.

Key words: Control study, The nasal endoscopic surgery, Sinus balloon dilatation, Sinusitis