Transcript ch._14-2
Lesson 2 Care of Teeth and Mouth How can you keep your teeth healthy? You can keep your teeth healthy by practicing good oral hygiene. Lesson 2 Lesson Objectives In this lesson, you’ll learn to: Identify the parts of a tooth. Examine the effects of health behaviors on prevention of diseases of the teeth and mouth. Relate the importance of early detection and warning signs that prompt individuals to seek dental care. Lesson 2 Care of Teeth and Mouth Function of the Teeth Maintaining healthy teeth is important not only for your appearance but also for your overall health. Your teeth allow you to chew foods properly and help form the shape and structure of your mouth. Lesson 2 Your Teeth Parts of a Tooth The structures of the periodontium support the teeth and hold them in place. The periodontium is made up of the gums, periodontal ligament, and the jawbone. A tooth is made up of three parts: 1. Crown 2. Neck 3. Root Lesson 2 Your Teeth Cross Section of a Tooth Lesson 2 Your Teeth The Crown The crown is covered with enamel, a hard substance made of calcium that protects the teeth. Beneath the enamel is dentin, a layer of connective tissue that contributes to the shape and hardness of a tooth and acts as a barrier to protect the pulp. Pulp extends into the root canal and provides nourishment to the tooth. Lesson 2 Healthy Teeth and Mouth Main Threats to Healthy Teeth As plaque coats a tooth, it prevents your saliva, which contains substances that protect teeth from bacteria, from reaching the tooth surface. In areas where plaque accumulates, bacteria thrive and the acids from the bacteria break down enamel. If the breakdown of enamel continues, a hole, or cavity, is formed in a tooth. The tooth can continue to decay to the pulp and may have to be removed if left untreated. Lesson 2 Healthy Teeth and Mouth Oral Hygiene Brushing teeth after eating removes plaque from the surface of the teeth, before bacteria can produce the acid that harms teeth. Flossing between teeth removes plaque in areas that cannot be reached with the bristles of a toothbrush. Regular visits to a dental care professional will ensure early detection of dental problems. Lesson 2 Healthy Teeth and Mouth Nutrition and Healthy Teeth Foods containing phosphorus, calcium, and vitamin C help keep your teeth strong and your gums healthy. Reducing the number of sugary snacks eaten between meals also helps protect your teeth from decay. Avoid all tobacco products since they stain teeth and cause gums to recede. They also increase the risk of oral cancer. Lesson 2 Problems of the Teeth and Mouth Oral Problems Halitosis Periodontal Disease Malocclusion Lesson 2 Problems of the Teeth and Mouth Halitosis Halitosis, or bad breath, can be caused by eating certain foods, poor oral hygiene, smoking, bacteria on the tongue, decayed teeth, or gum disease. If halitosis is caused by tooth decay or disease, treatment by a dental professional is needed. Lesson 2 Problems of the Teeth and Mouth Periodontal Disease Periodontal disease begins with the buildup of plaque. Plaque and tartar cause the gums to become irritated and swollen. Early detection is important since, left untreated, periodontal disease can destroy the bone and tissue that support the teeth. Lesson 2 Problems of the Teeth and Mouth Malocclusion Malocclusion can lead to decay and disease, and it can affect a person’s speech and ability to chew. Some malocclusions can be corrected by wearing braces, which reposition teeth by exerting pressure on them. Lesson 2 Quick Review Choose the appropriate option. Q. _________ is a sticky, colorless film that acts on sugar to form acids that destroy tooth enamel. 1. Plaque 2. Pulp 3. Malocclusion 4. Periodontium Lesson 2 Quick Review - Answer A. Plaque is a sticky, colorless film that acts on sugar to form acids that destroy tooth enamel. Click Next to attempt another question. Lesson 2 Quick Review Provide a short answer to the question given below. Q. Define the terms periodontium and pulp. Click Next to view the answer. Lesson 2 Quick Review - Answer A. The periodontium is the area immediately around the teeth. The pulp is the tissue that contains the blood vessels and nerves of a tooth. Click Next to attempt another question. Lesson 2 Quick Review Provide a short answer to the question given below. Q. How does plaque affect the teeth? Click Next to view the answer. Lesson 2 Quick Review - Answer A. Plaque coats the teeth, making it difficult for saliva to protect the tooth surface from the acids in bacteria. Click Next to attempt another question. Lesson 2 Quick Review Analyze the following question. How can early detection of gum disease affect your long-term health? Lesson 2 Quick Review - Answer A. Correct! Plaque is a sticky, colorless film that acts on sugar to form acids that destroy tooth enamel. Click Next to attempt another question. Lesson 2 Quick Review - Answer You have answered the question incorrectly. Go back to try again, or click Next to view the correct answer. Lesson 2 Your Teeth Parts of a Tooth The structures of the periodontium support the teeth and hold them in place. The periodontium is made up of the gums, periodontal ligament, and the jawbone. The A tooth is made up of three parts: periodontium is the area 1. Crown immediately 2. Neck around the teeth. 3. Root Lesson 2 Your Teeth The Crown The crown is covered with enamel, a hard substance made of calcium that The pulp is the protects the teeth. tissue that contains the blood vessels Beneath the enamel is dentin, a nerves of a and layer of connective tissue that tooth. contributes to the shape and hardness of a tooth and acts as a barrier to protect the pulp. Pulp extends into the root canal and provides nourishment to the tooth. Lesson 2 Healthy Teeth and Mouth Main Threats to Healthy Teeth As plaque coats a tooth, it prevents your saliva, which contains substances that protect teeth from bacteria, from reaching the tooth surface. Plaque is a In areas where plaque accumulates, bacteria thrive and the sticky, colorless film acids from the bacteria break down enamel. that acts on sugar to form acids that If the breakdown of enamel continues, a hole, or cavity, is destroy tooth enamel formed in a tooth. and irritate gums. The tooth can continue to decay to the pulp and may have to be removed if left untreated. Lesson 2 Problems of the Teeth and Mouth Periodontal Disease Periodontal disease begins with the buildup of plaque. Plaque and tartar cause the gums to become irritated and Periodontal swollen. disease is an of the Earlyinflammation detection is important since, left untreated, periodontal periodontal disease can destroy the bone and tissue that support the structures. teeth. Lesson 2 Problems of the Teeth and Mouth Periodontal Disease Periodontal disease begins with the buildup of plaque. Plaque and tartar cause the gums to become irritated and swollen. Early detection important since, left untreated, periodontal Tartar isisthe disease destroy the bone and tissue that support the hard,can crustlike teeth. substance formed when plaque hardens.