Aims: To test the reliability and utility of a force-based bruxism
detection system (Intra-Splint Force Detector [ISFD]) for multiple
night recordings of forceful tooth-to-splint contacts in sleeping
human subjects in their home environment. Methods: Bruxismtype
forces, ie, forceful tooth-to-splint contacts, during the night
were recorded with this system in 12 subjects (6 bruxers and 6
controls) for 5 nights in their home environment; a laboratorybased
nocturnal polysomnogram (NPSG) study was also performed
on 1 of these subjects. Results: All 12 subjects were able to
use the device without substantial difficulty on a nightly basis. The
bruxer group exhibited bruxism events of significantly longer
duration than the control group (27 seconds/hour versus 7.4 seconds/
hour, P < .01). A NPSG study performed on 1 subject
revealed that, when the masseter muscle electromyogram (EMG)
was used as a “gold standard,” the ISFD had a sensitivity of 0.89.
The correlation coefficient between the duration of events detected
by the ISFD and the EMG was also 0.89. Conclusion: These
results suggest that the ISFD is a system that can be used easily by
the subjects and that has a reasonable reliability for bruxism detection
as reflected in forceful tooth-to-splint contacts during sleep.
J OROFAC PAIN 2003;17:58–64.