Summary: Objective:To de termine the caries and dental alteration prevalence in cleft lip and palate in 3 to 14 yearsold children in a fundation of Santiago de Cali in 2007. Materials and methods: A sample of 30children were studied with fissured lip and cleft palate among 3 and 14 years old who were attendedby the foundation Smile Operation. The gathering of information was done by a survey and a clinicalexam analyzing dental caries, alterations and addition to this a plaque index, using the simplifiedindex of oral Hygiene (SIOH). Results: All of children presented dental alterations, the mostfrequent alteration was close together teeth in 70% follow of congenitally missing teeth in 63.3%,also dental caries was 90% in the population presenting least one lesion. Conclusions: Highsocioeconomic level was not present in this sample, and we only conclude for low socioeconomiclevel. the most of population were white people, all subjects present dental alteration, in dentalsize, form and amount. Instead low dental plaque index were found in most of children, theexperience of caries was high , and in equal proportions in boys and gils. Key words: Dentalalterations. Close together teeth. Congenitally missing teeth. Cleft lip. Cleft palate.