A survey of the presence of MPD syndrome and bruxing habits among 899 dentists was carried out at the 1973 ADA annual session. The findings reported here suggest that MPD syndrome occurs less frequently in dentists than in dental patients, and there is no difference in the incidence of pathologic bruxing habits between dentists and non-dentists. Of additional interest was the observation that dentists tend not to seek treatment for the relief of MPD. The most frequent form of treatment for both MPD and bruxing habits was occlusal equilibration.