Objectives - evaluation of the local function of the mucociliary clearance (MCC) in the postoperative period in patients with foreign bodies in the maxillary sinuses, who have undergone various surgical treatment. Material and methods. Using an original analysis technique for highspeed digital video recording of a microscopic picture of a specimen, obtained by brush biopsy from specific regions of the nasal cavity and paranasal sinus under endoscopic control, the MCC of the nasal mucosa was evaluated in the control group (n=60) and in the group of patients, who received various surgery (n=60) of maxillary sinuses. Results. We obtained the data on persistent and apparent local MCC disorders in the field of the surgical intervention in the postoperative period. Conclusion. Surgical interventions with access not in the area of the natural ostium of the maxillary sinus are more gentle, since they do not injure the mucociliary clearance in the key region - the ostium.