Evaluation of the non-functional tooth contact in patients with temporomandibular disorders by using newly developed electronic system.
Bottom Line: We designed and installed a software program to send emails regarding the non-functional tooth contact to the subjects' preregistered cellular phones at intervals of 20 ± 9 min daily for 10 consecutive days.Twelve patients with TMD and 12 gender- and age-matched healthy subjects responded via emails to one of 3 choices: no tooth contact, tooth contact during oral functions or tooth contact not associated with oral functions.The frequency of the non-functional tooth contact was significantly higher in the patients with TMD than in the healthy subjects (35·0% vs. 9·6%, P < 0·001), while no significant group difference was found for the frequency of functional tooth contact, the stress, anxiety, depression and personality.
Affiliation: Division of Temporomandibular Disorders and Orofacial Pain, Department of Special Needs Dentistry, Showa University School of Dentistry, Tokyo, Japan.Show MeSH
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Mentions: For the evaluation of the non-functional tooth contact, we designed and installed a software program to send emails regarding tooth contact to the subjects' preregistered cellular phones. The email message, which was sent off to the subject, asked the subjects whether their teeth were in contact or not when they received the email. The subjects were able to choose one of three replies (as hyperlinks): no tooth contact, tooth contact during oral functions (speaking, swallowing or chewing) or tooth contact not associated with oral functions (watching television, reading books, working, etc.). In case of non-functional tooth contact, the subjects choose one of the associated activities listed on the screen, which were hyperlinked. Each hyperlink created a blank email from a unique email address linked to a subject's cellular phone. If a subject did not click any hyperlink and send an email within 120 s, ‘no reply’ was recorded on the host computer. The emails were sent approximately every 20 min from 8:00 to 21:00. To avoid habituation and prevent any anticipatory behaviour, the software was programmed to add or subtract a random interval (between 0 and 9 min) from the preselected periods. Therefore, each subject received randomly sent emails 39 times daily. All the returned emails were stored on the host computer for offline analyses (Fig.1).
Affiliation: Division of Temporomandibular Disorders and Orofacial Pain, Department of Special Needs Dentistry, Showa University School of Dentistry, Tokyo, Japan.