Related Experiment Video
Updated: Feb 14, 2026

Physical Activity Measurement in Children Accepting Table Tennis Training
Published on: July 27, 2022
Determining Caries Activity Using Oratest Among 12-to 15-year-old Children
Purpose:
Dental caries is the primary pathological cause of early tooth loss in children, which may lead to malnutrition and other health problems. Identification of patients with active carious lesions and at high risk for caries can help to dramatically decrease the disease prevalence. Thus, recognising the importance of early diagnosis of caries, the present study was carried out to correlate caries with oral microflora using Oratest among 12- to 15-year-old schoolchildren.
Materials And Methods:
A total of 100 children were divided into control and test groups (n = 50) according to their DMFT scores. The test group was further divided into subgroup 1 (DMFT = 1-3) and subgroup 2 (DMFT > 3). Oratest, a caries activity test, was performed on all the children. Comparison among the variables was done using ANOVA and the independent sample t-test.
Results:
Boys had lower DMFT values (1.35 ± 0.2) than did girls (1.67 ± 0.2) (p = 0.38), and the Oratest time was higher among boys (132.8 ± 0.5 min) than girls (126.4 ± 0.5 min) (p = 0.53). The control group had the highest mean Oratest time (172.7 ± 0.3 min), followed by subgroup 1 (97.8 ± 0.2 min), and subgroup 2 had the lowest Oratest time (68.5 ± 14.8 min). A statistically significant negative correlation (r = -0.893) was found between the mean DMFT and the Oratest time (p < 0.001), ie, they were inversely related to each other.
Conclusion:
An inverse relationship exists between Oratest and DMFT score.
Related Concept Videos
Other Nuclides: 31P, 19F, 15N NMR
While fluorine-19 and phosphorous-31 have high natural abundances (100%) and positive gyromagnetic ratios, nitrogen-15 has a low natural abundance and a negative gyromagnetic ratio. However, nitrogen-15 is still preferred over nitrogen-14 (which has a...
Drug Dosing: Infants and Children
Rate-Determining Steps
In a multistep reaction mechanism, one of the elementary steps progresses significantly slower than the others. This slowest step is called the rate-limiting step (or rate-determining step). A reaction cannot proceed faster than its slowest step, and hence, the rate-determining step limits the overall reaction rate.
The concept of rate-determining step can be understood from the analogy of a 4-lane freeway with a short-stretch of traffic-bottleneck caused due to...
Determining Order of Reaction
Determination
Determining the pH of Salt Solutions

