title: Prevalence of hypodontia in 10- to 14-year-olds seeking orthodontic treatment at a group of clinics in Puerto Rico.
abstract: 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. A logistic regression model was done to evaluate the relation between the prevalence of hypodontia in the study group and clinic location, gender, and age; a 5% significance level was used.
  
  
  RESULTS
  The overall weighted prevalence of hypodontia was 6.02%. Females showed a higher weighted prevalence of hypodontia than did males (7.02% vs. 4.72%, respectively: p = 0.06). The prevalence also varied by geographic region, ranging from 3.21% at the San Juan clinic to 10.68% at the Aibonito clinic (p = 0.01). The most prevalent missing teeth were the maxillary lateral incisors, followed by the lower second premolars (1.9%).
  
  
  CONCLUSIONS
  The prevalence of hypodontia in Puerto Rico was 6.02%. Females presented a higher prevalence of hypodontia than did males. Each of the clinics in Fajardo, Bayamón, San Juan, and Guayama had a lower prevalence of hypodontia than the Aibonito clinic did. The tooth most frequently missing in the study group was the maxillary right lateral incisor.
authors.forename: Grace J
authors.initials: GJ
authors.lastname: Pagán-Collazo
authors.forename: Jazmin
authors.initials: J
authors.lastname: Oliva
authors.forename: Lumarie
authors.initials: L
authors.lastname: Cuadrado
authors.forename: Sona
authors.initials: S
authors.lastname: Rivas-Tumanyan
authors.forename: Augusto R
authors.initials: AR
authors.lastname: Elías-Boneta
mesh_terms: D000293:Adolescent; D000848:Anodontia / Q000453:epidemiology*; D002648:Child; D003430:Cross-Sectional Studies; D005260:Female; D006782:Hospitals, Special; D006801:Humans; D008297:Male; D009970:Orthodontics; D015995:Prevalence; D011647:Puerto Rico / Q000453:epidemiology