 Hello everyone, welcome back to a new session on dentist general. So today's topic is tools of dental public health. So what are the basic tools a dental public health section should use or a public health dentist should use. So we have seen this tools of epidemiology that is rate, ratio and proportion. So don't get confused. Dental public health is a very vast thing. So the first tool of dental public health is epidemiology. The tools of epidemiology is rate, ratio, proportion. So a public health dentist tools I am mentioning here, the first one is epidemiology. So we know its definition and its uses we have seen it in detail. So its aims and its objectives we know. The second one is the second tool of dental public health is biostatistics. So statistics nothing but expressing a condition using numbers by classifying and tabulating the numerical data and we can express using tables and graphs. So which is that branch of statistics concerned with mathematical facts and data relating to biological events. So that is a second tool of dental public health. So the uses are define normality to test the difference between any two groups to know the correlation or association to evaluate the efficacy of vaccines and evaluate achievements in public health programs. So these are biostatistics role in dental public health. Let's see what is the next tool in dental public health that is social science. So social science is a third tool in dental public health which includes sociology, cultural anthropology and psychology. So basically a social scientist becomes necessary when effort and effort do not match each other and we want to know why. And new health programs prepare to aid in public health worker in planning, evaluation and fluidization. So we need to understand the sociology and cultural difference of a group of people or a community or a region where we are planning to apply our health programs. So without knowing the social structure and the cultural background of a people this going waste of time and energy if we don't have a social aspect of the planning. So let's see what is the fourth tool of dental public health that is principles of administration. So administration is very much important. We need to have proper organization and management organization which deals with the structure of an agency and the way the people are arranged into working groups. So if we have a plan, if we have a dental public health program, so we need to organize the people into which work one group is assigned to and which group is assigned to which duty. So all this organization is very much important and management that handling of personnel and operations in such a way that the work of agency gets done. So managing inside the workforce is very much critical. So that is administration. So that is the fourth principle of dental public health or the tools of dental public health, not the principle tools of dental public health that is principles of administration and the last part of dental public health is preventive dentistry. So we know how do we prevent diseases we have seen in levels of prevention that is primary prevention, secondary prevention, tertiary prevention, health promotion, specific protection, early diagnosis and from treatment and tertiary we have disability limitation at rehabilitation. So that is all about the tools of dental public health. So what are the tools? First one was epidemiology and the second tool of dental public health is biostatistics and the third tool was social science and the fourth tool was principles of administration and fifth tool is preventive dentistry. So this is a short note question that asked a few times, so never get confused with the tools of epidemiology, tools of epidemiology is different, this is dental public health so how do we apply, how do we manage things in a public health program which is related to dentistry that is dental public health. So these are the tools of dental public health. So I will come within your session, thank you.