Department of Orthodontic, Paedodontic and Preventive Dentistry, Faculty of Dentistry, University of Khartoum, P.O. Box 102, Khartoum, Sudan.
Department of Paediatric Dentistry and Orthodontocs, University of Nairobi, P.O. Box 34848, Nairobi, 00100, Kenya.
BMC Oral Health. 2021 Jan 6;21(1):9. doi: 10.1186/s12903-020-01383-1.
Molar incisor hypomineralization (MIH) has serious impact on oral health-related quality of life for a child, due to its effects on tooth structure, aesthetics and behavior of the child. The current study was designed to determine the prevalence, pattern and distribution of MIH in school children in Sudan.
This was a descriptive cross-sectional study involving 568 children, aged 8-11 years from schools in Khartoum State. Following the collection of their socio-demographic data, the children were examined for hypomineralization on the 12 MIH-index teeth, the pattern and distribution of the MIH. The data collected was analyzed to obtain descriptive statistics. The results related to the socio-demography and other dental-related factors were tested using chi-square test and Spearman Rank Correlation, with the significant level set at p < 0.05.
The prevalence of MIH in the study population was 20.1%. The majority of the participants had both permanent first molars (PFMs) and permanent incisors affected (12.5%). However, in 7.6% of the cases only molars were affected. Even though more maxillary teeth were affected when compared to the mandibular teeth, there was no statistical significant difference between the occurrence of hypomineralization on mandibular and maxillary molars (p = 0.22). Maxillary incisors were significantly more affected by MIH when related to the mandibular ones (p = 0.00). Demarcated opacities were the commonest pattern of MIH defects (69.9%) in the experimental group.
The prevalence of MIH in Sudanese children was 20.1%. In both dental arches, the permanent molars and incisors were frequently affected, with the demarcated opacity type of MIH being the most common form of defect.
由于恒磨牙龋的发生会影响儿童的牙齿结构、美观和行为，从而对儿童的口腔健康相关生活质量产生严重影响。本研究旨在确定苏丹在校儿童恒磨牙龋的患病率、模式和分布。
这是一项描述性横断面研究，共纳入来自喀土穆州学校的 568 名 8-11 岁儿童。在收集社会人口统计学数据后，检查儿童 12 颗恒磨牙龋指数牙的龋损情况、龋损模式和分布。收集的数据进行分析以获得描述性统计数据。使用卡方检验和斯皮尔曼等级相关分析检验与社会人口统计学和其他牙齿相关因素相关的结果，显著性水平设为 p < 0.05。
研究人群中恒磨牙龋的患病率为 20.1%。大多数参与者的恒磨牙和恒切牙均受到影响（12.5%）。然而，在 7.6%的病例中，只有磨牙受到影响。虽然上颌牙齿的受累情况多于下颌牙齿，但下颌和上颌磨牙的龋损发生率无统计学差异（p = 0.22）。与下颌切牙相比，上颌切牙受恒磨牙龋的影响更大（p = 0.00）。界限清晰的不透明性是实验组中最常见的恒磨牙龋缺陷模式（69.9%）。
苏丹儿童恒磨牙龋的患病率为 20.1%。在两个牙弓中，恒磨牙和切牙经常受到影响，界限清晰的不透明性是最常见的龋损类型。
