Most people do not naturally have dazzling, snow-white teeth. The natural color varies, and teeth become discolored over time. They can yellow from normal chewing, which causes microscopic cracks over the years. According to the Consumer Guide to Dentistry, the cracks fill with debris from eating, and the teeth become dull and stained. Certain health problems can cause or worsen yellowing.
Description
Teeth appear yellow when an underlying material called dentin shows through its white enamel covering, according to Texas dentist Martin Spiller. Each tooth's inner layer is made up of dentin, while the outer surface is composed of a porcelain-like material called enamel. The Consumer Guide to Dentistry explains enamel can crack, thin and wear, allowing the yellow dentin to show through. The enamel surface also can become discolored by diet, health problems and lifestyle factors.
Causes
Certain health issues, such as teeth grinding and traumatic injuries, can yellow teeth. Grinders often suffer from stress problems, and need to obtain a tooth guard for overnight wear to minimize the damage. Tooth trauma is a health problem that a dentist must treat because cracks and chips can cause problems beyond yellowing. The damage usually worsens, and may result in tooth loss. Youngsters who receive tetracycline while their teeth are forming may develop yellowing or other discoloration. Smoking can yellow teeth, as well.
Considerations
Natural tooth color has some variance, according to the Consumer Guide to Dentistry. Yellow teeth don't necessarily indicate a health problem, or result from an outside cause. They are natural for some people if the color is present from the time the permanent teeth appear. Individuals also can develop yellow teeth because of poor hygiene, says Rob Danoff, a family physician and writer for MSN. The tiny cracks in their enamel gather organic material continually because it is not brushed away regularly. Gum disease can develop and lead to eventual bone and tooth loss.
Treatment
Teeth bleaching whitens yellow teeth, regardless of the cause, because it changes the color of the tooth rather than just removing stains. The Consumer Guide to Dentistry says people can bleach their teeth at home of go to see a dental professional. This procedure will not correct underlying causes, such as deep cracks, teeth grinding or bad hygiene. Whitening causes tooth sensitivity in some people. This is a temporary reaction rather than a health problem.
Prevention
Whitening toothpaste prevents tooth yellowing caused by stains. Alan Carr, a Mayo Clinic prosthodontist, says these toothpastes contain mild abrasives and chemicals that facilitate stain removal. You can also prevent discoloration with good dental hygiene, including daily brushing and flossing, and regular dental check-ups. Treat health problems like teeth grinding and traumatic damage immediately to lessen their effects.
