Community Dentistry and PSM

Alcohol-based sugars or polyalcohols like sorbitol and xylitol are used to substitute sucrose as they cannot be utilized by microbes in plaque.

Technical assault is defined as a defamation attempt or threat to touch without the patient's permission, even without any injury.

The success of dental health education depends upon active participation of the people to improve their oral health.

Snyder's test

1. It estimates the number of acid-producing bacteria in saliva and measures ability of micro organization to form organic acids.
2. Dye used-bromocresol green
   It is a colour indicator dye, which changes colour form green to yellow in pH 5.4 to 3.8.

Weight for height: weight in relation to height is now considered more important than weight above. Low weight for height is also known as nutritional wasting for emaciation (acute malnutrition). It is associated with increased risk of mortality and morbidity.

Prepost clinical trials centre on comparing the incidence of disease before and after introduction of a preventing measure. The events that took place prior to the use of the new treatment or preventive procedure are used as a standard for comparison. The experiment serves as its own control; eliminates virtually all group differences.

Zone III-body of lesion
A. It represents area of greatest demineralization
B. Pore volume 5-25%
C. Increased prominence of striae of Retzius is seen

Primary prevention can be defined as action taken prior to the onset of disease, which removes the possibility that the disease will ever occur. It signifies intervention in the prepathogenesis of a disease or a health problem, or other departure from health.

Effectiveness-A measure of the accuracy or success of a diagnostic or therapeutic technique, when carried out in an average chemical environment.

The ppm of 1.23% is 12,300 ppm.

Accretion-It is a process where most of the fluoride is buried within mineral crystallites during crystal growth.

The term validity refers to the extent to which the test accurately measures which 17 purports to measure. In other words, validity exposes the ability of a test to separate or distinguish those who have the disease from those who do not.

Dried tea leaves contain 100 - 400 ppm fluoride.

Primordial prevention is primary prevention in its purest form, i.e., prevention of the emergence of development of risk factors in countries or population groups in which they have not yet appeared. The main intervention in primordial prevention is through individual and mass education.

Chi-square test offers an alternate method of testing the significance of difference between two proportions. It has the advantage that it can also be used when more than two groups are to be compared.