Answer:
The correct answer is B. Proximal
Explanation:
Tooth have five surfaces distal, facial, Incisal, Lingual and mesial. Mesial surface is the tooth surface which is present towards the front portion and lingual surface towards back portion of mouth.
So the area where mesial surface of one tooth touches the lingual surface of another tooth is called proximal surface. There is a point where the two teeth that are adjacent touches each other called contact point of proximal surface. It becomes wider due to chewing and grinding with time.
Answer:
is this a beautiful answer?
Explanation:
The importance of measuring the accuracy and consistency of research instruments (especially questionnaires) known as validity and reliability, respectively, have been documented in several studies, but their measure is not commonly carried out among health and social science researchers in developing countries. This has been linked to the dearth of knowledge of these tests. This is a review article which comprehensively explores and describes the validity and reliability of a research instrument (with special reference to questionnaire). It further discusses various forms of validity and reliability tests with concise examples and finally explains various methods of analysing these tests with scientific principles guiding such analysis.
