Journal
JOURNAL OF ORAL REHABILITATION
Volume 37, Issue 3, Pages 157-162Publisher
WILEY
DOI: 10.1111/j.1365-2842.2009.02033.x
Keywords
temporomandibular disorders; oral parafunctions; research diagnostic criteria; logistic regression
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P>The frequency of diurnal clenching and/or grinding and nail-biting habits was assessed in patients affected by temporomandibular disorders (TMDs) and in healthy controls in order to investigate the possible association between these oral parafunctions and different diagnostic subgroups of TMDs. The case group included 557 patients (127 men, mean age +/- SD = 34 center dot 5 +/- 15 center dot 4 years; 430 women, mean age +/- SD = 32 center dot 9 +/- 14 center dot 1 years) affected by myofascial pain or disc displacement or arthralgia/arthritis/arthrosis. The control group included 111 healthy subjects (55 men, mean age +/- SD = 37 +/- 15 center dot 2 years; 56 women, mean age +/- SD = 38 center dot 2 +/- 13 center dot 8 years). Multinomial logistic regression analysis was used to assess the association between oral parafunctions and TMDs, after adjusting for age and gender. Daytime clenching/grinding was a significant risk factor for myofascial pain (odds ratio (OR) = 4 center dot 9, 95% confidence interval (CI): 3 center dot 0-7 center dot 8) and for disc displacement (OR = 2 center dot 5, 95% CI: 1 center dot 4-4 center dot 3), nail biting was not associated to any of the subgroups investigated. Female gender was a significant risk factor for myofascial pain (OR = 3 center dot 8; 95% CI: 2 center dot 4-6 center dot 1), whereas the risk factor for developing disc displacement decreased with ageing. No association was found between gender, age and arthralgia/arthritis/arthrosis.
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