Cavities occur as a result of tooth decay. Tooth decay is the destruction of
tooth structure. Tooth decay can affect both the enamel (the outer coating of
the tooth) and the dentin (the inner layer of the tooth).
Tooth decay occurs when foods containing carbohydrates (sugars and starches)
such as breads, cereals, milk, soda, fruits, cakes, or candy are left on the
teeth. Bacteria that live in the mouth digest these foods, turning them into
acids. The bacteria, acid, food debris, and saliva combine to form
plaque, which clings to the teeth. The acids in plaque dissolve the enamel
surface of the teeth, creating holes in the teeth called cavities, or
caries.
Who Gets Cavities?
Many people think cavities only affect children, but changes that occur with
aging make cavities an adult problem too. Recession of the gums (a pulling away
of gum tissue from the teeth), often associated with an increased incidence of
gingivitis (gum disease), can expose tooth roots to plaque. Also, sugary
food cravings in pregnant women can make them more vulnerable to developing
cavities.
Decay around the edges of cavity fillings is also common in older adults. Because
many older adults lacked the benefits of fluoride and modern preventive dental
care when they were growing up, they often have a number of dental fillings.
Over the years, these fillings may weaken and can fracture, allowing bacteria
to accumulate in the tiny crevices causing tooth decay.
How Do I Know if I Have a Cavity?
Your dentist can discover cavities during your regular dental check-up. The
tooth surface feels soft when probed by your dentist with a dental instrument.
X-rays can also show cavities before they become visible to the eye.
In advanced stages of tooth decay, you might experience a
toothache, especially after consuming sweet, hot, or cold foods or drinks.
Other signs of tooth decay are visible pits or holes in the teeth.
What Is the Treatment for Cavities?
There are a number of different treatments for cavities depending on the extent of tooth decay. If decay is not extensive, the decayed portion of the tooth is removed by drilling and replaced with a filling made of silver alloy, gold, porcelain, or a composite resin. Materials used in fillings are considered safe. Concerns have been raised over the safety of mercury-based, silver amalgams in particular, but the American Dental Association (ADA), FDA, and other public health agencies continue to support the safety of this restorative material. Allergies to silver amalgam are rare as are allergies to other restorative materials.
If the tooth decay is extensive and there is limited tooth structure remaining,
crowns will be used. If a crown is needed, the decayed or weakened area of
the tooth is removed and repaired and a crown is fitted over the remainder of
the tooth. Crowns are made from gold, porcelain, or porcelain fused to
metal.
If the decay causes the nerve or pulp of the tooth to die, a root canal will be performed. During a root canal, the center of the tooth (including the nerve, blood vessel, and tissue) is removed along with the decayed portions of the tooth. The roots are then filled with a sealing material. If necessary, a crown can be placed over the filled tooth.
Several new cavity treatments are under development. One experimental technique uses fluorescent light to detect the development of cavities long before they can be detected by traditional means, such as x-rays or a dental exam. In many cases, if cavities can be detected early, the tooth decay process can be stopped or reversed.
Researchers are also working on a "smart filling" to prevent further tooth decay by slowly releasing fluoride over time around fillings and in adjacent teeth.
WebMD Medical Reference
Reviewed by Elverne M. Tonn, DDS, on February 8, 2009
Absecessed tooth is a painful infection at the root of a tooth or between the gum and a tooth, most commonly caused by severe tooth decay. Symptoms of abscessed tooth include fever, painful chewing, sensitivity in the teeth, bitter taste in the mouth, and swollen neck glands.
Toothache usually refers to pain around the teeth or jaws. In most instances, toothaches are caused by tooth or jaw problems, such as a dental cavity, a cracked tooth, an exposed tooth root, gum disease, disease of the jaw joint (TMJ), or spasms of the muscles used for chewing. A toothache can also be caused by a problem that does not originate from a tooth or the jaw, like diseases of the heart (angina or heart attack), ear infections, and sinus infections. A thorough oral examination, which includes dental X-rays, can help determine the cause.
Fractures occur when bone cannot withstand the outside forces applied to the bone. Fractures can be open or closed. Types of fractures include: greenstick, spiral, comminuted, transverse, compound, or vertebral compression. Common fractures include: stress fracture, compression fracture, rib fracture, and skull fracture. Treatment depends upon the type of fracture.
Mercury is a naturally occurring element found in water, soil, and the air. Mercury is also contained in some fish, some of the products we use in the home, school, or dentist. Information about sources of mercury exposure, potential health effects, symptoms of exposure, fish that may contain mercury, consumer products that contain mercury, and ways to reduce your exposure to mercury is important for the health of you, and your family.
Teething in babies typically starts between 4 and 10 months of age. Symptoms and signs of cutting teeth include rash, drooling, decreased sleeping, fussiness, bringing the hands to the mouth, and rubbing the cheek or ear. Acetaminophen and ibuprofen may be used to treat teething pain.
Gum disease is caused by plaque and may result in tooth loss without proper treatment. Symptoms and signs of gum disease (gingivitis or periodontal disease) include receding gums, bad breath and pocket formation between the teeth and gums. Treatment depends upon the stage of the gum disease, how you responded to earlier treatments, and your overall health.
Cleft palate and cleft lip are facial and oral defects that occur early in pregnancy. A cleft lip is a split of the two sides of the upper lip, and a cleft palate is a split in the roof of the mouth. Cleft lip the fourth most common birth defect in the U.S. Repair of a cleft palate or cleft lip may require multiple surgeries.
Dental injuries range from a chipped or fractured tooth to a knocked out tooth. Treatment depends upon the severity of the dental injury. Dental injuries may be prevented by aligning protruding front teeth with braces and using face masks and mouthguards while playing sports.
Oral health problems in children include thumb sucking, tongue thrusting, lip sucking, tooth decay, and early tooth loss. Get tips on how to prevent these problems in your child.
Children's health is focused on the well-being of children from conception through adolescence. There are many aspects of children's health, including growth and development, illnesses, injuries, behavior, mental illness, family health and community health.
Smokeless tobacco can have negative health effects such as cancers, poor oral health (gum disease and tooth decay), infertility, pregnancy complications, and nicotine addiction.
Pycnodysostosis (pyknodysostosis) is an inherited disease of the bone. Characteristics of individuals with pycnodysostosis are short stature, brittle bones, short fingers, the midface is less full than usual, a prominent nose, small jaw, and more. There is no cure for pycnodysostosis.
"Toothache" usually refers to pain around the teeth or jaws primarily as a result of a dental condition. In most instances, toothaches are caused by tooth problems, such as a dental cavity, a cracked tooth, an exposed tooth root,
or gum disease. However, disorders of the jaw joint (temporo-mandibular joint) can also cause pain that is referred to as "toothache." The severity of a toothache can range from chronic and mild to sharp and excruciating. The pain may be aggravated by chewing or by cold or heat. A thorough oral examination, which includes dental X-rays, can help determine whether the toothache is coming from a tooth or jaw problem and the cause.
Sometimes, a toothache may be caused by a problem not originating from a tooth or the jaw. Pain around the teeth and the jaws can be symptoms of diseases of the heart (such as angina or heart attack), ears (such as inner or external ear infections), and sinuses (air passages of the cheekb...
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