NEET MDS Shorts
313518
Public Health DentistryIn a double-blind study, neither the participants nor the experimenters know who
is receiving the treatment or the placebo. This is to prevent any bias in the
study results due to the expectations of the participants or the researchers.
The statement that the investigator can omit data that fails to support the
hypothesis is not correct; data should be analyzed as is to maintain the
integrity of the study.
537777
Public Health DentistryIn epidemiology, incidence refers to the number of new cases of a disease or
condition that occur within a specific time frame in a defined population.
Dental caries, also known as tooth decay, is a common chronic condition where
bacteria in the mouth produce acids that destroy the tooth enamel and underlying
dentin, leading to cavities. The incidence of dental caries would be the number
of new cases of tooth decay diagnosed within a given period, say a year or
another time interval.
Point prevalence, on the other hand, is the proportion of a population that has
a specific condition at a particular point in time. It is a measure of the
prevalence of dental caries at a single moment, which does not account for new
cases or recoveries.
Period prevalence is the proportion of the population that has had a particular
condition during a specific period of time, such as a year or a month. This
measure includes both new cases and cases that have persisted from before the
start of the period in question.
692527
Public Health DentistryThe Snyder test is a microbiological test used to detect the presence of
specific bacteria associated with dental caries, primarily Streptococcus mutans.
It involves taking a sample of plaque, adding a sugar solution, and observing
for the formation of acid that indicates bacterial activity and the potential
for tooth decay. It is not used to detect fungal growth on skin or determine the
pH of crevicular fluid.
302390
Public Health DentistryThe OHI-S (Oral Hygiene Index-Simplified) index of Greene and Vermillion evaluates oral hygiene by assessing the extent to which calculus and debris cover six specified tooth surfaces (Answer: 4). This index is a simplified version of the original OHI index and is widely used in dental practice and research to evaluate the level of oral hygiene. It looks at the presence of debris and calculus on the lingual, labial, and buccal surfaces of the upper right first molar, lower left first molar, upper right central incisor, and lower left central incisor.
426959
Public Health DentistryStannous fluoride is often favored for adults due to its ability to provide antimicrobial benefits along with its fluoride release, which can help in controlling dental caries and reducing sensitivity. It is commonly found in toothpaste and mouth rinses and is known for its effectiveness in preventing cavities and plaque formation.
442916
Public Health DentistryA higher drop-out rate can reduce the power of a study, as it leads to a smaller sample size and potentially less reliable results. To maintain the statistical significance and power of the study, a larger sample size must be enrolled initially to account for the expected number of participants who will not complete the study. Other factors that influence sample size include the incidence of the disease, the significance level, and the size of the expected treatment effect, but the question specifically asks about the impact of an increasing drop-out rate.
981198
Public Health DentistryFor caries prevention, a 0.2% sodium fluoride mouth rinse is
typically recommended for use once weekly. This regimen provides sufficient
fluoride exposure to strengthen tooth enamel without causing adverse effects.
445872
Public Health DentistryAns. 2.. (Europe 1964 trade name Duraphat 25-75% caries reduction)