0593 DIFFERENCES IN PREDICTED THERAPEUTIC OUTCOME AND OPTIMAL PROTRUSION POSITION OF ORAL APPLIANCE DETERMINED DURING PSG WITH REMOTELY CONTROLLED MANDIBULAR POSITIONER BETWEEN CANADIAN AND CHINESE OSA PATIENTS

Abstract

therapy. The objective of this study is to evaluate changes in dental occlusion, which are associated with long-term oral-appliance and CPAP therapy. Methods: 29 OSAS patients using an anterior traction oral appliance and 34 patients using CPAP therapy, were evaluated. 1 Data was analyzed at baseline, two year and 10 year follow-up. Changes in dental occlusion were manually analyzed from dental plaster casts using a digital sliding caliper. Results: At 2 year follow-up, oral appliance therapy resulted in significant dental changes as compared to CPAP therapy. Overjet and overbite decreased on average with 1.5 mm (sd. ±1.5mm) and 1.2 mm (sd ±1.1mm), respectively. The anterior-posterior change in occlusion was significantly larger in the oral appliance group (−1.3 ± 1.5 mm) as compared to the CPAP group (−0.1 ± 0.6 mm). Both groups showed a significant decrease in number of occlusal contact points in the (pre)molar region. After 10 years follow-up, higher significant changes were seen in overjet and overbite, but also in anterior-posterior change and in the number of contact points in the (pre)molar region. Definitive analysis are currently conducted and will follow. Conclusion: This study confirms that oral appliance and CPAP therapy changes dental occlusion significantly. These changes appear more pronounced with an anterior traction oral appliance as compared to CPAP therapy.