Aims: To investigate, by means of a mail questionnaire, the prevalence
of symptoms related to temporomandibular disorders
(TMD) in 50-year-old subjects living in the counties of Örebro
and Östergötland, Sweden. Methods: The total population comprised
8,888 individuals, and the overall response rate was 71%.
A clinical evaluation of the masticatory system was performed in
subgroups to validate the responses to the questionnaire. There
was satisfactory correspondence between self-reports and welldefined
clinical conditions. Results: Women reported, more often
than men, pain from the temporomandibular joints (TMJs), TMJ
sounds, bruxism, sensitive teeth, and burning mouth symptoms.
The prevalences of difficulties in jaw opening, loss of anterior
teeth due to trauma, and masticatory problems were greater in
men than in women. No gender difference was found in the number
of remaining teeth. Logistic regression analysis with pain from
the TMJ as the dependent variable identified bruxism, impaired
chewing efficiency, and gender (women) as the most significant
risk factors. With reduced chewing ability as the dependent variable,
several missing teeth constituted the highest risk, followed by
pain from the TMJ, bruxism, gender (men), and loss of anterior
teeth due to trauma. Conclusion: There were significant gender
differences in reported TMD-related symptoms in 50-year-old
Swedes. Bruxism was a significant risk factor for pain from the
TMJ. Reduced number of teeth and pain from the TMJ were significant
risk factors for impaired chewing ability.
J OROFAC PAIN 2003;17:29–35.