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The health promotional phase in public health is between the years:

 # The health promotional phase in public health is between the years:
A. 1880-1920
B. 1920-1960
C. 1960-1980
D. 1980-2000



The correct answer is B. 1920-1960.

Four phases of public health have been recognized:
A. Phase one: Disease Control Phase (1880-1920)
The 19th century Public Health- matter of sanitary legislation and sanitary reform, safe water supply and waste disposal. 

B. Phase Two: Health promotional phase (1920-1960)
At the beginning of the 20th century, the concept of health promotion emerged. As a result, in addition to disease control activities, one more goal was initiated. e.g. Maternal and child health, School health, mental health, occupational health and rehabilitation services.

C. Phase Three: Social Engineering phase (1960-1980)
Chronic conditions such as cancer, Diabetes mellitus (DM), cardiovascular diseases (CVD), and alcoholism, drug addiction occurred. These chronic health problems could not be tackled by the traditional approaches to public health i.e. isolation, immunization, and disinfection) nor they can be explained on the basis of germ theory (biomedical) of disease. The concept of risk factors (social, environmental, genetic and lifestyle) came into action as determinants of disease. 

D. Phase four: Health for all phase (1980-2000)
Primary Health care, Health for all (HFA)- Health for all meant that every individual should have access to Primary Health Care 

Monomer in heat cure denture base acrylic resins

 # In heat cure denture base acrylic resins, the monomer is:
A. Methyl methacrylate
B. Ethyl methacrylate
C. Methyl ethyl methacrylate
D. Polymethyl methacrylate


The correct answer is A. Methyl methacrylate.

Most polymethyl methacrylate resin systems include powder and liquid components. The powder consists of prepolymerized spheres of polymethyl methacrylate and a small amount of benzoyl peroxide, termed the initiator, which is responsible for starting the polymerization process. The liquid is predominantly nonpolymerized methyl methacrylate monomer with small amounts of hydroquinone. Hydroquinone is added as an inhibitor, which prevents undesirable polymerization or “setting” of the liquid during storage. Inhibitors also retard the curing process and thereby increase working time.

Ref: Phillip’s Science of Dental Materials, 12th Edition, Page no. 475



Esthetic Appliances for Orthodontic Treatment

 # In adults seeking orthodontic treatment with esthetic appliances the following may be choices EXCEPT:
a) Lingual orthodontics 
b) Ceramic brackets
c) Clear aligner therapy
d) Titanium brackets



The correct answer is D. Titanium brackets.

All other options are considered esthetic orthodontic appliances because they are either not visible or highly perceptible. Titanium brackets display metal and are not esthetic. Clear aligner therapy can be used for minor orthodontic corrections and can be preferred by patients due to esthetics and ease of use. 


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