Related Experiment Video
Updated: May 7, 2026

Micro-dissection of Enamel Organ from Mandibular Incisor of Rats Exposed to Environmental Toxicants
Published on: March 29, 2018
[Tooth decay in school environment at Brazzaville (Congo)]
A R Okoko1, G Ekouyabowassa, E Moyen
1Sce Pédiatrie, Centre Hospitalier et Universitaire de Brazzaville (CHU-B), République du Congo.
Aim:
To determine the frequency of dental caries and habits that can be the cause of this disease in Brazzaville.
Methods:
A prospective study was conducted in primary schools between February and May 2010. This study involved a sample of 307 students of both sexes, aged 4-15 years from school in the city of Brazzaville.
Results:
Prevalence of dental caries was 53.4% and the index of DMFT 2.06. Use of toothbrush was 99.4%. Two children (0.7%) brushed their teeth three times a day. There was a statistical link between regularity of brushing and occurrence of caries. The prevalence of caries was of 53% in children who brushed once a day and 12.8% in those who brushed twice a day. No decay was noted in those who brushed three times a day (p = 0.001). The DMFT was 2.06 in children who used non-fluoridated toothpaste and 1.13 in those who used the fluoridated toothpaste (p = 0.002).
Conclusion:
To ensure students a better oral hygiene and healthier teeth, a module in oral health education in schools is one of the way to fight against this public health problem.
Related Concept Videos
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 grinding food.
Oral Cavity
Teeth: The teeth are the hardest structures in our bodies. Humans have two sets of teeth throughout their lifetime: deciduous (baby) teeth and permanent teeth. Each tooth consists of several parts: the crown (visible part), the root (embedded in the jaw), enamel (hard outer...
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 and...
Development of the Oral Microbiota
Healthcare Associated Infections II: Preventive Measures
The best practices for preventing healthcare-associated infections include hand hygiene, patient risk...
