Comparison of diagnosing the relationship between the root of maxillary posterior tooth and maxillary sinus between panoramic radiography and cone beam computer tomography / 口腔疾病防治

Objective@#To study the diagnostic accuracy and the distance between the root of maxillary posterior tooth and the maxillary sinus using panoramic radiography and cone beam computer tomography; to provide basic information for clinicians to treat diseases in the maxillary posterior region. @* Methods@#Eighty patients were included in this study. A total of 671 specimens were measured for the distance between the root tip and the maxillary sinus floor in both imaging modalities.@*Results @#The roots that did not contact the sinus floor or contacted but did not project into the sinus cavity showed an agreement of 82% and 70% when using panoramic radiography. Forty-eight percent of the roots that projected into the sinus cavity in panoramic radiography showed protrusion into the sinus with cone beam computer tomography (CBCT). For panoramic radiography and CBCT showing root projections into the sinus cavity, the average distances were 2.19 ± 1.82 mm and 1.47 ± 1.01 mm, respectively. There was a significant difference between the two values (P ＜ 0.05).@*Conclusion@# Panoramic radiography is more accurate when roots of maxillary posterior teeth do not contact the sinus floor or contact it. However, it has a lower accuracy rate when the tooth roots protrude into the sinus.

Research on the changes in upper airway shape and respiratory function before and after upper airway treatment of patients with mild and moderate OSAHS by wearing mandibular advancement snore stopping devices / 口腔疾病防治

Objective@#To investigate the changes of the upper airway shape and respiratory function in patients with mild and moderate obstructive sleep apnea-hypopnea syndrome (OSAHS) before and after wearing mandibular advancement snore stopping devices (MASSD), providing a reference and basis for the treatment mechanisms and clinical efficacy of MASSD for patients with mild and moderate OSAHS.@*Methods@#Sixty patients who were diagnosed with mild and moderate OSAHS by polysomnography were selected. Snoring frequency, the apnea hypopnea index and lowest oxygen saturation in 60 patients before and after treatment were compared. The patients’ upper airways were scanned by CBCT before and after wearing MASSD. In Vivo Dental software was used to reconstruct the three-dimensional shape of upper airway. The upper airway sagittal diameter, the coronal diameter, the minimum cross-sectional area and the volume of each segment were measured. The snoring frequency, the apnea hypopnea index and the lowest oxygen saturation were compared before and after treatment.@*Results@#Before wearing MASSD, the snoring frequency, the apnea hypopnea index, and the minimum oxygen saturation of 60 patients were [946 (542,1 010)], (20.61 ± 5.19), and (78 ± 8)%, respectively. After wearing MASSD, the snore frequency [19(11,30)] and the respiratory disorder index (10.86 ± 4.31) decreased significantly and the minimum oxygen saturation increased (92 ± 3)%. Compared with before wearing MASSD, no statistically significance differences were detected (P > 0.05) except for the sagittal diameter and coronal diameter of the surface of the palatum durum. The sagittal diameter and the coronal diameter of each plane of the airway increased, and the minimum cross-sectional area of each section of the airway and the volume of each section of the airway displayed varying degrees of significant increases (P < 0.001) after wearing MASSD. @*Conclusion@#Wearing MASSD can open the airways of patients with mild and moderate OSAHS and increase the airway volume of the upper airway to improve the respiratory function.

Research on the changes in upper airway shape and respiratory function before and after upper airway treatment of patients with mild and moderate OSAHS by wearing mandibular advancement snore stopping devices / 口腔疾病防治

Objective@#To investigate the changes of the upper airway shape and respiratory function in patients with mild and moderate obstructive sleep apnea-hypopnea syndrome (OSAHS) before and after wearing mandibular advancement snore stopping devices (MASSD), providing a reference and basis for the treatment mechanisms and clinical efficacy of MASSD for patients with mild and moderate OSAHS.@*Methods@#Sixty patients who were diagnosed with mild and moderate OSAHS by polysomnography were selected. Snoring frequency, the apnea hypopnea index and lowest oxygen saturation in 60 patients before and after treatment were compared. The patients’ upper airways were scanned by CBCT before and after wearing MASSD. In Vivo Dental software was used to reconstruct the three-dimensional shape of upper airway. The upper airway sagittal diameter, the coronal diameter, the minimum cross-sectional area and the volume of each segment were measured. The snoring frequency, the apnea hypopnea index and the lowest oxygen saturation were compared before and after treatment. @*Results@#Before wearing MASSD, the snoring frequency, the apnea hypopnea index, and the minimum oxygen saturation of 60 patients were [946 (542,1 010)], (20.61 ± 5.19), and (78 ± 8)%, respectively. After wearing MASSD, the snore frequency [19(11,30)] and the respiratory disorder index (10.86 ± 4.31) decreased significantly and the minimum oxygen saturation increased (92 ± 3)%. Compared with before wearing MASSD, no statistically significance differences were detected (P > 0.05) except for the sagittal diameter and coronal diameter of the surface of the palatum durum. The sagittal diameter and the coronal diameter of each plane of the airway increased, and the minimum cross-sectional area of each section of the airway and the volume of each section of the airway displayed varying degrees of significant increases (P < 0.001) after wearing MASSD.@*Conclusion@#Wearing MASSD can open the airways of patients with mild and moderate OSAHS and increase the airway volume of the upper airway to improve the respiratory function.