Effect of cigarette smoking on pain intensity of TMD patients: a pilot study.

To evaluate the effect of cigarette smoking (CS) on pain intensity in a sample of temporomandibular disorder (TMD) patients, 352 clinical charts were reviewed. Subjects were first divided into two groups: smokers (YS) and nonsmokers (NS); then, YS were further divided into three subgroups: light smokers (LS), moderate smokers (MS), and heavy smokers (HS). Overall TMD pain intensity was higher in YS, compared to NS, and a correlation was found between pain intensity and the number of cigarettes smoked in a day by each subject. A significant difference was evident between NS and HS. The results were not evident in males; age was not correlated either with smoking or pain intensity, and the effect of CS on pain intensity was not correlated with any particular TMD diagnosis. CS seems to be a relevant factor affecting the intensity of TMD pain, thus, control of smoking habits should be considered when treating TMD patients.