Oral Health CRC, Melbourne Dental School, The University of Melbourne, Parkville, Vic., Australia.
Int J Paediatr Dent. 2013 Jan;23(1):48-55. doi: 10.1111/j.1365-263X.2012.01223.x. Epub 2012 Jan 25.
Demarcated hypomineralization lesions are not uncommon in second primary molars. Data on the prevalence of hypomineralized second primary molars (HSPM) are scarce.
To investigate the prevalence of HSPM, assess the relationship between HSPM and first permanent molars previously diagnosed with demarcated lesions and to determine the severity of HSPM in relation to dental caries severity.
A cluster sample of 809, 7- to 9-year-old children was examined. The scoring criteria proposed by the European Academy of Paediatric Dentistry for hypomineralization in permanent dentition were adapted to score HSPMs. The International Caries Detection and Assessment System was used to assess caries status in the second primary molar of the children diagnosed with demarcated defects. The examination was carried out in schools by a calibrated dentist.
Of the children examined, 53 (6.6%) had hypomineralization defects in at least one second primary molar. Combinations of affected first permanent and second primary molars were reported in 21 (39.6%) of cases. Severe carious lesions were found mostly in teeth with enamel breakdown.
The prevalence of HSPM was 6.6%. Over one-third of affected second primary molars were associated with demarcated lesions in the first permanent molars. The chance of severe caries increased with the increase in the demarcated lesion severity.
第二恒磨牙的局限性脱矿病变并不少见。关于低矿化第二恒磨牙（HSPM）的患病率数据很少。
调查 HSPM 的患病率，评估 HSPM 与以前诊断为局限性病变的第一恒磨牙之间的关系，并确定 HSPM 的严重程度与龋齿严重程度的关系。
对 809 名 7-9 岁儿童进行了聚类样本检查。适应了欧洲儿科牙科学会提出的恒牙低矿化评分标准来评分 HSPM。使用国际龋病检测和评估系统来评估被诊断为局限性缺陷儿童的第二恒磨牙的龋病状况。检查由一名经过校准的牙医在学校进行。
在所检查的儿童中，有 53 名（6.6%）至少有一颗第二恒磨牙存在低矿化缺陷。在 21 例（39.6%）病例中报告了同时受影响的第一恒磨牙和第二恒磨牙。严重的龋齿病变主要发生在有牙釉质破裂的牙齿中。
HSPM 的患病率为 6.6%。超过三分之一的受影响的第二恒磨牙与第一恒磨牙的局限性病变有关。随着局限性病变严重程度的增加，严重龋齿的发生几率增加。
