Thitasomakul Songchai, Thearmontree Angkana, Piwat Supatcharin, Chankanka Oitip, Pithpornchaiyakul Wattana, Teanpaisan Rawee, Madyusoh Sorae
Department of Preventive Dentistry, Faculty of Dentistry, Prince of Songkla University, Hatyai, Songkhla, Thailand.
Community Dent Oral Epidemiol. 2006 Dec;34(6):429-36. doi: 10.1111/j.1600-0528.2006.00292.x.
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-up period of 3-9 months.
A longitudinal observational community-based survey of 599 children, 9-18 months old. The children's dental examinations were first carried out at the age of 9 months with re-examination at 12 and 18 months by five dentists using standardized methods. The affected rates of dental caries were determined for prevalence, incidence density for risk of caries per person (IDp) and risk by surface (IDs). 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.
The prevalence of caries was 2.0%, 22.8% and 68.1% among 9-, 12- and 18-month olds, respectively. The IDp observed for newly affected children 9-12 and 12-18 months old was 10.32 and 15.70 persons/100 person-months, respectively. The IDs for children 9-12 months old was 2.17 newly affected surfaces/100 surface-months whereas it was 2.22 surfaces/100 surface-months for children 12-18 months 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-up period from 9 to 12 months old. It was 3.43-39.60% from 12 to 18 months old.
An extremely high caries-affected rate was found among the study children even before the age of 18 months. The buccal surface of the maxillary incisors was the most affected. The teeth acquired caries at 3-6 months after initial eruption and carious lesions developed continuously over time.
研究幼儿龋齿（ECC）的发展速率和模式，并调查在3至9个月的随访期内龋损的转变情况。
对599名9至18个月大的儿童进行基于社区的纵向观察性调查。儿童在9个月大时首次进行口腔检查，并在12个月和18个月时由五名牙医使用标准化方法进行复查。确定龋齿的患龋率、每人龋病发病密度（IDp）以及按牙面计算的发病风险（IDs）。通过计算转变概率，探讨牙齿状态从未萌出（U）到健康（S）的随时间变化情况，包括釉质龋（D1）、牙本质龋（D2）和累及牙髓的龋病（D3）。
9个月、12个月和18个月大儿童的患龋率分别为2.0%、22.8%和68.1%。9至12个月以及12至18个月新患龋儿童的IDp分别为10.32和15.70人/100人月。9至12个月儿童的IDs为2.17个新患龋牙面/100牙面月，而12至18个月儿童为2.22个牙面/100牙面月。上颌切牙的颊面受影响最大（44.9%），其次分别是舌面、近中面和远中面。在9至12个月的随访期内，龋病进展的转变概率在1.79%至15.38%之间。12至18个月时为3.43%至39.60%。
在本研究儿童中，甚至在18个月龄之前就发现了极高的患龋率。上颌切牙的颊面受影响最大。牙齿在萌出后3至6个月开始患龋，龋损随时间持续发展。
