7 4. List the layers of a tooth and a brief description. Enamelhard substance made of calciumDentinlayer of connective tissue that acts as barrier to protect the pulp.Pulp:Tissue that contains the blood vessels and nerves of a tooth.
8 5. What is one of the main threats to the health of your teeth? BacteriaLive in your mouthLive on the sugar in food
9 6. Answer the following about plaque: What is plaque?Sticky, colorless film that acts on sugar to form acids.Acids destroy tooth enamel and irritate gums.How does plaque contribute to tooth decay?Plaque coats a tooth and prevents saliva from reaching the tooth.When plaque accumulates, bacteria develops acid with act on the tooth enamel.
10 7. What are the benefits of brushing and flossing teeth? Brushing removes plaque.Flossing removes plaque in areas that are not reached by the brush.
11 8. Describe 5 tips for effective tooth brushing. Hold bristle tips at 45 degrees to gum line.Brush back and forth in short strokesUse a gentle scrubbing motion.Brush outer surfaces of each tooth, inner surfaces and then chewing surfaces.Floss not only between teeth but also beneath the gum line.
12 9. Besides brushing and flossing, what are two others ways to maintain dental health? Regular visits to the dental care professional.Eating a well-balanced diet.
13 10. Answer the following about problems of the teeth and mouth A. What is halitosis?Bad Breath
14 10b. What causes halitosis? Caused by eating certain foodsPoor oral hygieneSmoking,Bacteria on the tongueDecayed teeth and gum disease
15 10c. What is periodontal disease? Inflammation of the periodontal structures.
16 10d. How are plaque, tartar and gum disease related? If plaque and tartar not removed, gums become irritated and swollen.Left untreated it will develop into gum disease.Can progress to the point of tooth loss.
17 10e. What are three possible sources of a malocclusion? Extra teethCrowded teethMisalignment of the upper and lower jaws.
18 10f. What are two bad effects of malocclusion? Lead to decay and disease.Can affect speechAbility to chew
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