Air exchange in the maxillary sinus in the postoperative period after maxillary sinusotomy through the inner and middle nasal airway

Abstract

There are many computer models that describe the airflow in various anatomical variants and the pathology of the nasal cavity and paranasal sinuses. The data that describe the Reynolds number and airflow velocity in the different section of the nasal cavity of the patients with cyst of the maxillary sinus are very different. The results of operation of the maxillary sinusotomy through the middle nasal airway are disjointed and contradictory. There is also a little information of aerodynamics in the odontogenic pathology of the maxillary sinus. Purpose: Calculate airflow velocity in various sections of the nasal cavity, and air exchange in the maxillary sinus in patients with cysts of the maxillary sinus in the postoperative period after endonasalmaxillary sinusotomy through the lower and middle nasal airway. Material and methods: 112 patients with maxillary sinus cyst were examined. Patients were divided into three clinical groups. The first group, 41 people, included patients who had removed the cysts of the maxillary sinus through the lower nasal airway, as well as intact structures of the middle nasal passage remained. The second group included 38 patients who had removed the maxillary sinus cyst through the middle nasal airway. In the third group, were selected 33 patients, who had not been diagnosed with nasal and nasal sinus pathology, but they were examined by an ENT specialist before implantation of the teeth. Computer tomography of nasal sinuses was performed for all patients. The Planmeca Tomography, manufactured in Finland, was used, with the further processing of information using the software Romexis Viewer. Using the Romexis Viewer software and MeshLabit was measured the size of the anatomical structures of the nasal cavity and nasal sinuses, the calculation of air flow velocity at the airways of the nasal cavity, the calculation of the Reynolds number. To calculate the parameters of external respiration, all patients were examined for external respiration using a mask spirometer. Statistical processing of the obtained data was carried out using SPSS software 13. Results: The rate of air flow that passes through the nasal cavity on the inhalation and exhalation in the postoperative period in patients with cysts of the maxillary sinus that has undergone endonazal maxillary sinusotomy through the lower nasal airway, is statistically no different from those patients who had no pathology of the nasal cavity and nasal sinuses. The volume of air exchange in the case of removal maxillary cyst through the lower nasal airway does not statistically differ from the volume of air exchange in patients without pathology of the nasal cavity and nasal sinuses.