You would still have the same age, gender, personality, skin color, etc. and you would be able to speak at least one local language and would know basic information of the era and place. Your family, social standing, and such would be randomly picked.
Dental problems aren’t about them looking good; teeth used to kill. Dental disease used to be the 5th leading cause of death. Your great-grandparents aren’t the best bar for dentistry in the past as modern dentistry began in the 18th century.