1. Of the four different environmental-level interventions, which do you believe is the most likely to produce positive results? Explain your answer. 2. What is an intervention? Identify the difference between environmental intervention and individual intervention with regard to adolescent drinking and give an example of each.

3. Describe the way that a young person’s interpretation and expectancy of alcohol often change over the course of his or her childhood and adolescence.

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Oral hygiene is the practice of keeping one's mouth clean and free of disease and other problems (e.g. bad breath) by regular brushing of the teeth (dental hygiene) and cleaning between the teeth. It is important that oral hygiene be carried out on a regular basis to enable prevention of dental disease and bad breath.

Brush your teeth at least twice a day (morning and before bed time) and floss at least once a day. Better still, brush after every meal and snack. These activities remove plaque, which if not removed, combines with sugars to form acids that lead to tooth decay.

Tooth decay can be painful and lead to fillings, crowns or inlays. If tooth decay is not treated, the nerve of the tooth can become infected and die, causing an abscess. This may then need root canal treatment or even for the tooth to be removed. It is very important that you keep up a good routine at home to keep your teeth and gums healthy. Gum disease is common and, if left untreated, may lead to bone loss around the teeth. In some cases, it may lead to loose teeth and teeth being lost. Gum disease is preventable.

It is easy to get your mouth clean and healthy, and keep it that way. A simple routine can help prevent most dental problems:

brushing your teeth last thing at night and at least one other time during the day, with a fluoride toothpaste

spit out after brushing and do not rinse, so that the fluoride stays on your teeth longer

cleaning between the teeth with ‘interdental' brushes or floss at least once a day

good eating habits - having sugary foods and drinks less often

Normally the body's natural defenses and good oral health care, such as daily brushing and flossing, keep bacteria under control. However, without proper oral hygiene, bacteria can reach levels that might lead to oral infections, such as tooth decay and gum disease

Don’t go to bed without brushing your teeth

It’s no secret that the general recommendation is to brush at least twice a day. Still, many of us continue to neglect brushing our teeth at night. But brushing before bed gets rid of the germs and plaque that accumulate throughout the day.

Brush properly

The way you brush is equally important — in fact, doing a poor job of brushing your teeth is almost as bad as not brushing at all. Take your time, moving the toothbrush in gentle, circular motions to remove plaque.

Use a fluoride toothpaste

When it comes to toothpaste, there are more important elements to look for than whitening power and flavors. No matter which version you choose, make sure it contains fluoride.

While fluoride has come under scrutiny by those worried about how it impacts other areas of health, this substance remains a mainstay in oral health. This is because fluoride is a leading defense against tooth decay. It works by fighting germs that can lead to decay, as well as providing a protective barrier for your teeth.

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