Prevalence of hypodontia in 10- to 14-year-olds seeking orthodontic treatment at a group of clinics in Puerto Rico.

Objective: To estimate the prevalence of hypodontia in a group of 10- to 14-year-olds from a group of orthodontic clinics in Puerto Rico.

Methods: A cross-sectional study was conducted to estimate the prevalence of hypodontia in 10- to 14-year-olds from orthodontic clinics located in each of 9 regions (as determined by the government-run health insurance program, Reforma) in Puerto Rico. A total of 1,911 patients, ranging in age from 10 to 14 years, were evaluated using patient charts covering from May 2004 through June of that same year.