IADR Abstract Archives
Effect of Tongue Pressure on the Severity of OSA
Objectives: During sleep, it is known that tongue ptosis occurs by relaxation of the tongue muscle (e.g. genioglossus muscle), which cause sleep apnea. Tongue ptosis is considered to be a functional obstacle in which the tongue muscular strength decreases and a morphological change in which the tongue posture changes. The purpose of this study is to examine the tongue muscle strength (tongue pressure) and tongue posture of obstructive sleep apnea (OSA) patients and clarify their relationship.
Methods: The present study was conducted after obtaining approval from the Ethics Committee of Niigata Dental University Niigata Hospital (Approval No. ECNG-H-254). In 22 patients (11 men, 11 women; age range 43-77 years) underwent polysomnography (PSG), lateral cephalometric radiograph and measurement of tongue presser. Afterward, PSG was scored according to the guidelines of AASM2007. Tongue posture was assessed on cephalograms as some tongue-to-palate distances (TPDs) and mandibular plane to hyoid bone distance (MPH). Tongue pressure measured by the JMS tongue pressure measurement system®. The correlation among PSG parameters, TPDs, MPH and the tongue pressure were calculated using the Spearmen rho correlation coefficient.
Results: The mean value of apnea hypopnea index (AHI), the percentage of time spent with oxygen saturation below 90% to total sleep time (%T<90) and MPH were 27.8±14.8 times/ hours, 1.7±2.1% and 17.1±7.2mm, respectively. And mean values of tongue pressure was 38.7±10.0 kPa. Significant correlation were seen between AHI and tongue pressure (r=-0.535, P<0.05) as well as MPH and %T<90 (r=0.592, P<0.05). However, no significant correlation was found among TPDs.
Conclusions: The result indicated that tongue pressure was related to ascertain degree to OSA.
Methods: The present study was conducted after obtaining approval from the Ethics Committee of Niigata Dental University Niigata Hospital (Approval No. ECNG-H-254). In 22 patients (11 men, 11 women; age range 43-77 years) underwent polysomnography (PSG), lateral cephalometric radiograph and measurement of tongue presser. Afterward, PSG was scored according to the guidelines of AASM2007. Tongue posture was assessed on cephalograms as some tongue-to-palate distances (TPDs) and mandibular plane to hyoid bone distance (MPH). Tongue pressure measured by the JMS tongue pressure measurement system®. The correlation among PSG parameters, TPDs, MPH and the tongue pressure were calculated using the Spearmen rho correlation coefficient.
Results: The mean value of apnea hypopnea index (AHI), the percentage of time spent with oxygen saturation below 90% to total sleep time (%T<90) and MPH were 27.8±14.8 times/ hours, 1.7±2.1% and 17.1±7.2mm, respectively. And mean values of tongue pressure was 38.7±10.0 kPa. Significant correlation were seen between AHI and tongue pressure (r=-0.535, P<0.05) as well as MPH and %T<90 (r=0.592, P<0.05). However, no significant correlation was found among TPDs.
Conclusions: The result indicated that tongue pressure was related to ascertain degree to OSA.