Introduction and Objective: Traditionally, the oral health status of a population is assessed through clinical indicators. However, in the last recent years, the importance of the psycho social impact of oral diseases on the population’s quality of life has been recognized. The objective of the study is to describe quality of life factors related to oral-health among children 8-10 years-old stratifying by gender and type of institution. Materials and Methods: Linguistic validation of the COHQoL questionnaire was conducted through: a)Forward-backward independent-translations, b)Pilot testing, and c)Reconciliation of this translation by pediatric-dentists. The 29-item-questionnaire was selfadministered in a sample of 168 children 8-10 years old. Tables of frequencies and means were generated. Statistical differences between gender and type of institution were explored using Fishers Exact Test (p-value <0.05) Results: Around 50% of the subjects perceived that their teeth were in a more or less to a bad condition, and 42% reported feeling dental pain during the last month. Nearly 43% reported being worried about what others think about their teeth. 52% of females experienced dental pain during the last month compared to males (33%), and missed schooldays due to this cause (p-value 0.008). Finally, those in public schools tended to miss more frequently (14%) schooldays due to dental problems compared to subjects in private schools (6%). Conclusion: Information from an oral health quality of life questionnaire may be useful for assessing population’s oral health considering the psychosocial impact of oral conditions on the general wellbeing. Key words: Quality of life, Oral health, Questionnaire. Rev.CES Odont.2010;23(1)9-15