IADR Abstract Archives
Treatment Effect of Four Different Type Splints for Sleep Bruxism
Objectives: Dental clinicians usually provide the occlusal splint to patients with sleep bruxism (SB), however, the influence of splint for SB is still unclear. The objective of this study was to investigate treatment effect of 4 type splints (Soft Stabilization; SS, Hard Stabilization; HS, Hard palatal; P and Metal Canine; M) by using randomized crossover design.
Methods: We recorded jaw movement using our custom-made jaw tracking device, biological signals (EEG, EOG, ECG, EMG, respiration) from polysomnography and audio-visual record of 3 adult healthy volunteers (37.4+/-7.0 yrs old) in the sleep laboratory. The second night data was used for analysis as baseline. Four different splints were randomly worn for each subject, and the trial period were 2 weeks except for M type (3 days). Sleep recording was performed on the final day. After more than 2 weeks as wash-out, next trial of the other splint was started. Sleep stages were classified on Rechtschaffen and Kales methods, and SB events were detected by American Academy of Dental Medicine criteria. SB events of each splint night compared with baseline night.
Results: Total sleep time was 5.9 hours on average, sleep efficiency was 92.0%, and sleep latency was 4.1 minutes, which showed that the subjects had good sleep state. These subjects were classified mild/moderate bruxers, since SB events were observed from 5.8 to 13.4 times per total sleep time (hour) at baseline. All subjects had decreased SB events by some types of splints. One subject had the largest decrease (-68.6%) with SS type, and in others with the M type splint the most decrease (-30.4%, -73.9%) was observed. P type splint lead to highest SB event (-11.1+/-33.5%) during splint wearing in all subjects.
Conclusions: Although the subject number was small in this study, M type splint might be most effective than the other splints.
Methods: We recorded jaw movement using our custom-made jaw tracking device, biological signals (EEG, EOG, ECG, EMG, respiration) from polysomnography and audio-visual record of 3 adult healthy volunteers (37.4+/-7.0 yrs old) in the sleep laboratory. The second night data was used for analysis as baseline. Four different splints were randomly worn for each subject, and the trial period were 2 weeks except for M type (3 days). Sleep recording was performed on the final day. After more than 2 weeks as wash-out, next trial of the other splint was started. Sleep stages were classified on Rechtschaffen and Kales methods, and SB events were detected by American Academy of Dental Medicine criteria. SB events of each splint night compared with baseline night.
Results: Total sleep time was 5.9 hours on average, sleep efficiency was 92.0%, and sleep latency was 4.1 minutes, which showed that the subjects had good sleep state. These subjects were classified mild/moderate bruxers, since SB events were observed from 5.8 to 13.4 times per total sleep time (hour) at baseline. All subjects had decreased SB events by some types of splints. One subject had the largest decrease (-68.6%) with SS type, and in others with the M type splint the most decrease (-30.4%, -73.9%) was observed. P type splint lead to highest SB event (-11.1+/-33.5%) during splint wearing in all subjects.
Conclusions: Although the subject number was small in this study, M type splint might be most effective than the other splints.