Crowns that show a dark area at the gum line reflect an inner metal layer that is covered over with porcelain. With all-ceramic crowns, teeth can be made to look completely natural, even at the gum line area.

In a porcelain fused to metal crown, the porcelain is baked onto a metal substructure. The porcelain alone was not strong enough to not break from the forces of biting and chewing, so the metal was used underneath to add strength. The porcelain on these crowns looked too opaque and fake (picture white sink porcelain), because it had to block out the underlying metal.

This can occur for several reasons: the crown may not fit well, it may be too far under the gum, or it may have a metal base that blocks light. Teeth are like little fiber optic units. When light hits them, it illuminates the teeth and the surrounding gum tissue to give it that healthy pink glow. Metal blocks the light, causing the tissue to look dark. Non-metallic crowns are best for a natural appearance.

A - Often times this is due to the shadow created by the metal at the margin of a porcelain crown. The metal is often used for strength and reinforcement for the overlying porcelain. There is a way around this problem. Your dentist can instruct the lab fabricate eithern an all porcelain crown or a metal and porcelain crown with an ALL porcelain edge (margin) to create a more natural cosmetic appearance. At our office, it is very rare for us to make crowns with metal margins.

People who have anorexia often have saliva that is deficient in the buffers that protect teeth from the effects of acid manufactured by bacteria in the mouth. There is also significant acid in many of the low-cal foods and soft drinks that anorexics favor. Normal saliva contains buffers that protect teeth from acid. The body makes those buffers in part from materials found in fatty foods. If you don't eat enough dietary fat, your body can't protect your teeth adequately.

Crowns should last approximately 5-8 years. However, with good oral hygiene and supervision most crowns will last for a much longer period of time. Some damaging habits like grinding your teeth, chewing ice, or fingernail biting may cause this period of time to decrease significantly.

A gum line results when oils from the pizza sauce penetrate the crust. This can be prevented by brushing the crust (with docking marks down) lightly with a vegetable based oil. A .It’s not. It is only baked enough to stop the yeast development. This allows the crust to be more shelf stable and easier to handle than a fresh crust. Once the par-baked crust is topped and baked it will be entirely cooked.

It is a black optical coating beneath the highly reflective aluminium coated surface. This black coating absorbs the internal reflections within the projector that can lead to a halo or glow around the projected image.

NO! These tests are unlike pregnancy tests. The results are only positive if the test line is equal to or darker than the control line. There are some women who will ovulate without getting a "true" positive. Some women will only have a nearly positive test. If you see a nearly positive test, it MAY be a good idea to have intercourse because ovulation will probably occur soon.

If the "extra brightness" box is unchecked, check it. Each monitor is different, and many have differrent distributions of brightness to the naked eye (this is called "gamma").

In most cases Bareboat insurance regulations do not permit you to sail after dark. Exceptions are made in some areas for purposes of making a night crossing in order to make a daylight landfall.

Visitors aren't allowed to move by themselves in the dark room as it could put the waiters at risk (remember the waiters/guides are blind and need clear walkways to work around the tables). If you wish to move or need to leave the dark room to go to the restrooms for instance, you just have to call your waiter; they will assist you anytime.

Would be fun but, no toilets aren't in the dark! The toilets are located on ground floor level and first floor lounge and are fully lit.

When astronomers add up the masses and luminosities of the stars near the Sun, they find that there are about 3 solar masses for every 1 solar luminosity. When they measure the total mass of clusters of galaxies and compare that to the total luminosity of the clusters, they find about 300 solar masses for every solar luminosity. Evidently most of the mass in the Universe is dark.

Yes. The dentist's main goal is to create a crown that looks like a natural tooth. That is why your dentist takes an impression. To achieve a certain look, a number of factors are considered, such as the color, bite, shape and length of your natural teeth. Any one of these factors alone can affect your appearance. If you have a certain cosmetic look in mind for your crown, discuss it with your dentist at your initial visit.

Yes. Some Smokenders participants choose to use the nicotine patch or gum during the program. However, participants looking to use either of these nicotine substitutes should be very careful as to the level they start with. One should calculate how much nicotine one is presently putting into their system (multiply the number of cigarettes by the nicotine level) and then buy the appropriate patch or gum.

There are several reasons why patients develop serious gum disease. Although there may be some hereditary influence, the majority of gum problems result from controllable factors. Patients who have neglected regular home care like brushing and flossing, or who have failed to visit a dentist for professional cleaning, tartar removal and oral evaluation often develop signs of gum disease.