{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,13]],"date-time":"2025-12-13T07:01:58Z","timestamp":1765609318861},"reference-count":29,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2006,11,7]],"date-time":"2006-11-07T00:00:00Z","timestamp":1162857600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Comm Dent Oral Epid"],"published-print":{"date-parts":[[2006,12]]},"abstract":"<jats:p><jats:bold>Abstract\u2002\u2013\u2002<\/jats:bold><jats:bold> Objective:\u2002<\/jats:bold> To examine the rate and pattern of early childhood caries (ECC) development and to investigate the transitional changes of the carious lesions during a follow\u2010up period of 3\u20139\u2003months.<\/jats:p><jats:p><jats:bold>Methods:\u2002<\/jats:bold> A longitudinal observational community\u2010based survey of 599 children, 9\u201318\u2003months old. The children's dental examinations were first carried out at the age of 9\u2003months with re\u2010examination at 12 and 18\u2003months by five dentists using standardized methods. The affected rates of dental caries were determined for prevalence, incidence density for risk of caries per person (ID<jats:sub>p<\/jats:sub>) and risk by surface (ID<jats:sub>s<\/jats:sub>). Changes in dental status over time were explored from unerupted (U) to sound (S), including enamel caries (D1), dentine caries (D2) and caries involving pulp (D3) by computing transitional probabilities.<\/jats:p><jats:p><jats:bold>Results:\u2002<\/jats:bold> The prevalence of caries was 2.0%, 22.8% and 68.1% among 9\u2010, 12\u2010 and 18\u2010month olds, respectively. The ID<jats:sub>p<\/jats:sub> observed for newly affected children 9\u201312 and 12\u201318\u2003months old was 10.32 and 15.70 persons\/100 person\u2010months, respectively. The ID<jats:sub>s<\/jats:sub> for children 9\u201312\u2003months old was 2.17 newly affected surfaces\/100 surface\u2010months whereas it was 2.22 surfaces\/100 surface\u2010months for children 12\u201318\u2003months old. The buccal surface of maxillary incisors was the most affected (44.9%) followed by lingual, mesial and distal surfaces, respectively. The transitional probability of caries progression ranged between 1.79% and 15.38% during the follow\u2010up period from 9 to 12\u2003months old. It was 3.43\u201339.60% from 12 to 18\u2003months old.<\/jats:p><jats:p><jats:bold>Conclusions:\u2002<\/jats:bold> An extremely high caries\u2010affected rate was found among the study children even before the age of 18\u2003months. The buccal surface of the maxillary incisors was the most affected. The teeth acquired caries at 3\u20136\u2003months after initial eruption and carious lesions developed continuously over time.<\/jats:p>","DOI":"10.1111\/j.1600-0528.2006.00292.x","type":"journal-article","created":{"date-parts":[[2006,11,7]],"date-time":"2006-11-07T15:12:30Z","timestamp":1162912350000},"page":"429-436","source":"Crossref","is-referenced-by-count":54,"title":["A longitudinal study of early childhood caries in 9\u2010 to 18\u2010month\u2010old Thai 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