ch7,lesson2personalhealthdentalhealth

ch7,lesson2personalhealthdentalhealth内容摘要：

ue Continued…. •Sugary foods are not only to blame. •Starches, such as bread amp。 cereal, also cause acids to form. •If you snack often, your teeth may be prone to decay. • Plaque also produces substances that irritate the gums, making them red, tender or bleed easily. • In fact, periodontal (gum) disease is a main cause of tooth loss in adults. Plaque Cont. Dental Disease Facts • Although dental caries is largely preventable, it remains the most mon chronic disease of children aged 5 to 17 years – five times more mon than asthma. • 6 out of 10 children in the US have one or more decayed or filled primary teeth by age five. What is a Cavity? •A cavity develops when a tooth decays or breaks down. •A cavity is a hole that can grow bigger and deeper over time. •Cavities are also called dental caries, and if you have a cavity, it39。 s important to get it repaired. Cavities Continued…. • Left untreated, the plaque produces acids that eat holes through the enamel into the underlying dentin and pulp layers of the tooth. • This does cause pain and left untreated the cavity will eventually destroy dentin, pulp and tooth nerve. Gum Disease •Is also known as Periodontal Disease. •It includes gingivitis amp。 periodontitis. • Periodontal disease is a chronic bacterial infection that affects the gums and bone supporting the teeth. •It begins w。