Dentist Interview Questions And Answers

Sealants are a thin, plastic coating that is painted on the chewing surfaces of teeth usually the back teeth (the premolars, and molars) to prevent tooth decay. The painted on liquid sealant quickly bonds into the depressions and groves of the teeth, forming a protective shield over the enamel of each tooth.

Typically, children should get sealants on their permanent molars and premolars as soon as these teeth come in. In this way, the dental sealants can protect the teeth through the cavity-prone years of ages 6 to 14. However, adults without decay or fillings in their molars can also benefit from sealants.

Exposure to all sources of radiation including the sun, minerals in the soil, appliances in your home, and dental X-rays -- can damage the body's tissues and cells and lead to the development of cancer. Fortunately, the dose of radiation you are exposed to during the taking of X-rays is extremely small.
Advances in dentistry over the years have lead to the low radiation levels emitted by dental X-rays. Some of the improvements are new digital X-ray machines that limit the radiation beam to the small area being X-rayed, higher speed X-ray films that require shorter exposure time compared with older film speeds to get the same results, and the use of film holders that keep the film in place in the mouth (which prevents the film from slipping and the need for repeat X-rays and additional radiation exposure). Also, the use of lead-lined, full-body aprons protects the body from stray radiation (though this is almost nonexistent with the modern dental X-ray machines.) In addition, federal law requires that X-ray machines be checked for accuracy and safety every two years, with some states requiring more frequent checks.

Sealants can protect the teeth from decay for many years, but they need to be checked for chipping or wear at regular dental check-ups.

Drill-less dentistry, also called air abrasion and micro-abrasion, is being offered by some dentists.

Air abrasion can be used to remove some tooth decay, to remove some old composite restorations, to prepare a tooth surface for bonding or sealants, and to remove superficial stains and discolorations.

The air abrasion instrument works like a mini sandblaster to spray away the decay, stain, or to prepare the tooth surface for bonding or sealant application. With air abrasion, a fine stream of particles is aimed at the tooth surface. These particles are made of silica, aluminum oxide, or a baking soda mixture and are propelled toward the tooth surface by compressed air or a gas that runs through the dental hand-piece. Small particles of decay, stain, etc., on the tooth surface are removed as the stream of particles strikes them. The remnant particles are then "suctioned" away.

Over the past several years, concerns have been raised about silver-colored fillings, otherwise called amalgams. Because amalgams contain the toxic substance mercury, some people think that they are responsible for causing a number of diseases, including autism, Alzheimer's disease, and multiple sclerosis.

All toothpastes help remove surface stains through the action of mild abrasives. Some whitening toothpastes contain gentle polishing or chemical agents that provide additional stain removal. Whitening toothpastes can help remove surface stains only and do not contain bleach; over-the-counter and professional whitening products contain hydrogen peroxide (a bleaching substance) that helps remove stains on the tooth surface as well as stains deep in the tooth.

None of the home use whitening toothpastes can come even close to producing the bleaching effect you get from your dentist's office through chair-side bleaching or power bleaching. Whitening toothpastes can lighten your tooth's color by about one shade. In contrast, light-activated whitening conducted in your dentist's office can make your teeth three to eight shades lighter.

Several different options are available to change the shape of teeth, make teeth look longer, close spaces between teeth or repair chipped or cracked teeth. Among the options are bonding, crowns, veneers, and re-contouring.

Dental bonding is a procedure in which a tooth-colored resin material (a durable plastic material) is applied to the tooth surface and hardened with a special light, which ultimately "bonds" the material to the tooth.

Dental crowns are tooth-shaped "caps" that are placed over teeth. The crowns, when cemented into place, fully encase the entire visible portion of a tooth that lies at and above the gum line.

Veneers (also sometimes called porcelain veneers or dental porcelain laminates) are wafer-thin, custom-made shells of tooth-colored materials that are designed to cover the front surface of teeth. These shells are bonded to the front of the teeth.

Recontouring or reshaping of the teeth (also called odontoplasty, enameloplasty, stripping, or slenderizing) is a procedure in which small amounts of tooth enamel are removed to change a tooth's length, shape or surface.

There are a number of strategies that can be used to help reduce fear, anxiety, and pain. These strategies include use of medications (to either numb the treatment area or sedatives or anesthesia to help you relax), use of lasers instead of the traditional drill for removing decay, application of a variety of mind/body pain and anxiety-reducing techniques (such as guided imagery, biofeedback, deep breathing, acupuncture, and other mental health therapies), and perhaps even visits to a dentophobia clinic or a support group.

Choose the toothpaste that tastes and feels best. Gel or paste, wintergreen or spearmint all work alike. If you find that certain ingredients are irritating to your teeth, cheeks or lips, or if your teeth have become more sensitive, or if your mouth is irritated after brushing, try changing toothpastes.
Considering other properties of toothpaste such as whitening toothpastes, tartar-control, gum care, desensitizing, etc.

The hardest, white outer part of the tooth. Enamel is mostly made of calcium phosphate, a rock-hard mineral.

A layer underlying the enamel. Dentin is made of living cells, which secrete a hard mineral substance.

The softer, living inner structure of teeth. Blood vessels and nerves run through the pulp of the teeth.

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.