An Eight-year Follow-up of the Occlusal Surfaces of First Permanent Molars

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Abstract
The state of the occlusal surfaces of the first permanent molars (FPMs) in a representative group of subjects from seven to 15 years of age was followed retrospectively year by year. Data were taken from oral health records. Standardized charts include information on dental check-ups, oral health status, and the treatment given. The state of each occlusal surface was classified into four categories: (1) sound but unsealed, (2) sealed, (3) filled, or (4) decayed. An overall annual attack rate for all occlusal FPM surfaces was 5.9% per year, and for approximal surfaces, 1.3%. Occlusal caries attacks had been most prevalent between seven and nine years of age, whereas new approximal lesions had been most frequent from ages 11 to 13. The FPMs that had been sealed at the age of seven developed fewer caries than did any other group during the follow-up.