The phenomenon of ageism in healthcare is a significant threat to elderly people's well-being. There is a literature gap regarding the topic of ageism among dental professionals in Greece. This study aims to contribute to filling this gap. A cross-sectional study was conducted using recently validated in Greece 15-item ageism 6-point Likert-scale. The scale has been previously validated in the environment of senior dental students. Purposive sampling was used to select participants. A total of 365 dentists responded to the questionnaire. As to the internal consistency of the scale, Cronbach's alpha found to be very low (α = 0.590) to support the reliability of a total of 15 Likert-type questions (items) of the scale. However, the factor analysis resulted in three factors that achieved high reliability towards validity. The demographic comparison with these factors and single items revealed statistically significant gender differences in ageism (with males being more ageist than females), and differences related to other socio-demographic factors, which however, were related to factors or items individually. The study revealed that the Greek version of the ageism scale for dental students had not further validity and reliability among dentists. However, some items were distributed into three factors that presented significant validity and reliability. This is of great importance for the ongoing research on the topic ″ageism in dental healthcare″.