Related Experiment Video
Updated: Dec 24, 2025

Oral Biofilm Sampling for Microbiome Analysis in Healthy Children
Published on: December 31, 2017
Prevalence of hypomineralised second primary molars (HSPM) in Syrian preschool children
1Department of Paediatric Dentistry, Tishreen University, Latakia, Syria. fifoali1992@gmail.com.
Aim:
The objective of this research was to determine the incidence and severity of HSPM and its association with caries in 4-5 year-old children in Latakia, Syria.
Methods:
A cross-sectional study was carried out with 600 preschool children. The European Academy of Pediatric Dentistry (EAPD) criteria were used for scoring HSPM. The decayed, missing and filled teeth (dmft) index was used to evaluate caries status.
Results:
The prevalence of HSPM was 41%. The difference in HSPM prevalence between males and females was not statistically significant (p > 0.05). Children with HSPM are more likely to have dental caries (OR 6.69; CI 4.5_10; p < 0.001).
Conclusions:
The prevalence of HSPM was relatively high in Syrian children. HSPM increases the incidence of caries.
Related Concept Videos
Teeth
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin...
Assessment of the Mouth
Mouth Inspection
The inspection begins with visually examining the mouth for symmetry, color, and size.
Tooth Anatomy
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or...

