title: Incidence and progression of approximal caries from 11 to 22 years of age in Sweden: A prospective radiographic study.
abstract: Using annual bite-wing radiographs, the incidence and progression of approximal caries (4d-7m) were assessed longitudinally in teenagers and adolescents whose treatment had been based on remineralizing rather than restorative strategies. A closed cohort of 536 children initially was followed from 11 to 22 years of age. The scoring system was: 0 = no visible radiolucency; 1-2 = radiolucency in the enamel up to the enamel-dentin border; 3 = radiolucency with a broken enamel-dentin border but with no obvious progression in the dentin; 4 = radiolucency with obvious spread in the outer half of the dentin, and 5 = radiolucency in the inner half of the dentin. Caries rates were estimated as the number of new lesions/100 tooth surface-years, and the Kaplan-Meier estimate was used to calculate the cumulative survival time of each approximal surface. Three events were used: the transitions from states 0 to 2, 2 to 4 and 3 to 4. The results showed a considerable variation between the surfaces in both caries rates and survival time. For all surfaces combined, the median caries rate from state 0 to 2 was 3.9 new lesions/100 tooth surface-years; from state 2 to 4, the rate was 5.4, and from state 3 to 4 it was 20.3. Of the sound surfaces (state 0), 75% survived 6.3 years without reaching state 2. Given state 2, 75% survived 4.8 years without reaching the outer half of the dentin (state 4), while given a lesion at the enamel-dentin border (state 3), 75% survived 1.3 years without doing the same. The median survival time of lesions from state 3 to 4 was 3.1 years. The group with DMFSappr>1 at the age of 11-12 years had a risk of new approximal enamel lesions (state 0-2) that was 2.5 times greater than that of the group with DMFSappr = 0-1.
authors.affiliation: Department of Paediatric Dentistry, Eastman Dental Institute, Stockholm, Sweden.ingegerd.mejare@ftv.sll.se
authors.forename: I
authors.initials: I
authors.lastname: Mejàre
authors.forename: C
authors.initials: C
authors.lastname: Källest l
authors.forename: H
authors.initials: H
authors.lastname: Stenlund
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D015331:Cohort Studies; D004245:DMF Index; D003731:Dental Caries / Q000000981:diagnostic imaging / Q000453:epidemiology* / Q000473:pathology / Q000628:therapy; D003743:Dental Enamel; D003804:Dentin; D018450:Disease Progression; D005260:Female; D006801:Humans; D015994:Incidence; D008137:Longitudinal Studies; D008297:Male; D011446:Prospective Studies; D016300:Radiography, Bitewing; D012306:Risk; D016019:Survival Analysis; D013548:Sweden / Q000453:epidemiology; D014089:Tooth Remineralization