21⟩ What is cementum?
A layer of connective tissue that binds the roots of the teeth firmly to the gums and jawbone.
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A layer of connective tissue that binds the roots of the teeth firmly to the gums and jawbone.
Tissue that helps hold the teeth tightly against the jaw.
A normal adult mouth has 32 teeth, which (except for wisdom teeth) have erupted by about age 13.
Incisors are 8 in total. The middlemost four teeth on the upper and lower jaws.
Canines are 4 in total. The pointed teeth just outside the incisors.
Premolars are 8 in total. Teeth between the canines and molars.
Molars are 8 in total. Flat teeth in the rear of the mouth, best at grinding food.
Wisdom teeth or third molars 4 in total. These teeth erupt at around age 18, but are often surgically removed to prevent displacement of other teeth.
Bacteria evade removal by brushing and saliva and damage the enamel and deeper structures of teeth. Most cavities occur on molars and premolars.
A general name for disease of the teeth, including cavities and caries.
Inflammation of the deeper structures of the teeth (periodontal ligament, jawbone, and cementum). Poor oral hygiene is usually to blame.
Inflammation of the surface portion of the gums, around and between the crowns of the teeth. Plaque and tartar buildup can lead to gingivitis.
A sticky, colorless film made of bacteria and the substances they secrete. Plaque develops quickly on teeth after eating sugary food, but can be easily brushed off.
If plaque is not removed, it mixes with minerals to become tartar, a harder substance. Tartar requires professional cleaning for removal.
The upper teeth protrude significantly over the lower teeth.
The lower teeth protrude significantly past the upper teeth.
Bruxism also called Teeth grinding Stress. Anxiety, or sleep disorders can cause teeth grinding, usually during sleep. A dull headache or sore jaw are symptoms.
When one or more teeth become sensitive to hot or cold, it may mean the dentin is exposed.
The right approach will remove many stains. Foods, medications, tobacco, and trauma are some of the things that can discolor your teeth. You have three options for whitening them. Your dentist can use a whitening agent and a special light in his office. Or you can bleach them at home with a plastic tray and gel from your dentist or a store. The simplest choice, whitening toothpaste, only removes surface stains.
These little holes in your teeth are bad news. You get them when a sticky bacteria, called plaque, builds up on your teeth, slowly destroying the hard outer shell, called enamel. Adults can also have problems with tooth decay at the gum line and around the edges of earlier fillings. To prevent it, brush your teeth at least twice a day with a fluoride toothpaste, limit snacks, floss daily, and keep up with your dental appointments. Ask your dentist if you should use a sealant or a fluoride rinse.