Posts for: November, 2020
For over half a century now, community water systems have been adding fluoride to drinking water to help reduce the risk of tooth decay. Numerous long-term studies have demonstrated the soundness of this practice, prompting the U.S. Centers for Disease Control to call water fluoridation one of the ten most effective public health measures of the 20th Century.
In the 1960s, after years of study into the teeth-strengthening effects of fluoride, the U.S. Public Health Service recommended that drinking water utilities add fluoride at a rate of between 0.7 and 1.20 milligrams per liter (mg/L) or parts per million (ppm) of water. This recommendation held fast until 2015 when the service changed the recommendation to no more than 0.7 mg/L.
Why the change to guidelines that had been in place for over fifty years? The revision was in response to an increasing occurrence of dental fluorosis. This condition happens when the teeth absorb more fluoride than necessary, leading to discoloration of the surface enamel, creating effects like small white spots or brownish “mottling.”
Dental fluorosis is the only known health condition caused by fluoride. As such, it doesn't damage the tooth itself, and is mainly a cosmetic problem. But it can still be avoided if fluoride intake is kept at moderate levels.
The original recommendation was sound science when first introduced. Since then, though, the prevalence of fluoride in everyday life has grown, with the chemical commonly found in dental care products like toothpastes or mouthrinses, as well as many processed foods and beverages and even infant formula. Our society's overall intake of fluoride has been growing as a result.
The new recommendation came after several years of research to verify water fluoridation levels of 0.7 mg/L would still be effective in the fight against tooth decay while lowering the risk of dental fluorosis. With this adjustment, this important and safe measure for keeping your family's teeth protected against disease is safer than ever.
One in ten Americans has diabetes, a serious condition that may increase the development and severity of other health problems—including gum disease. Because of this latter connection, dental providers join other health professionals during November's National Diabetes Month to call attention to this chronic disease and its effect on health and well-being.
There's another health condition with a diabetes connection that isn't as well known: obstructive sleep apnea (OSA). It's also of keen interest to dental providers, as dentists are often involved in the discovery and treatment of this common sleep disorder.
OSA is the temporary blockage of the airway during sleep by the tongue or other anatomical structures. The subsequent drop in oxygen awakens the body to remove the obstruction. People with OSA may not realize they have the condition, but their bed partner can often attest to their snoring, snorting and gasping for breath during the night. Such episodes can occur several times per night, depriving the person of sufficient sleep.
Chronic OSA can contribute to the development of other health problems, among them Type 2 diabetes. It can do this first by interfering with the metabolization of glucose (blood sugar). It may also increase the body's resistance to insulin, the primary hormone regulating glucose.
Fortunately, properly managing OSA can lower your risk for diabetes, and that's where dentists may be able to help. For one thing, we dentists are often the first to notice early signs of OSA—sometimes even before our patients do.
According to the American Sleep Apnea Association, as many as 80% of the estimated 22 million Americans with OSA may not know they have it. But dentists often identify OSA indicators while examining patients: signs like an enlarged tongue or tonsils, or patients falling asleep in the exam chair. While we can't formally diagnose OSA, we often refer symptomatic patients to a sleep specialist.
Dentists also offer an alternative to the most common OSA therapy, which is continuous positive airway pressure (CPAP). This therapy employs a motorized pump that delivers pressurized air into the throat via face mask to keep the airway open during sleep. Although effective, some people find a CPAP machine noisy and uncomfortable to use.
Alternatively, dentists can provide an oral device that can often help patients with mild to moderate OSA that's worn in the mouth during sleep. Most of the various types of these appliances either reposition the lower jaw with a hinge mechanism to keep the throat open or pull the tongue away from the airway through a suction effect.
Diabetes is one part of a chain reaction that can bring unexpected challenges to your health, including to your teeth and gums. You can slow or even stop its development with proper diet, exercise and good, restful sleep. Dealing with OSA is often part of that equation—and we may be able to help.
If you would like more information about the prevention and treatment of diabetes, please contact us or schedule a consultation. To learn more, read the Dear Doctor magazine article “Oral Appliances for Sleep Apnea.”
The monarchs of the world experience the same health issues as their subjects—but they often tend to be hush-hush about it. Recently, though, the normally reticent Queen Elizabeth II let some young dental patients in on a lesser known fact about Her Majesty's teeth.
While touring a new dental hospital, the queen told some children being fitted for braces that she too “had wires” once upon a time. She also said, “I think it's worth it in the end.”
The queen isn't the only member of the House of Windsor to need help with a poor bite. Both Princes William and Harry have worn braces, as have other members of the royal family. A propensity for overbites, underbites and other malocclusions (poor bites) can indeed pass down through families, whether of noble or common lineage.
Fortunately, there are many ways to correct congenital malocclusions, depending on their type and severity. Here are 3 of them.
Braces and clear aligners. Braces are the tried and true way to straighten misaligned teeth, while the clear aligner method—removable plastic mouth trays—is the relative “new kid on the block.” Braces are indeed effective for a wide range of malocclusions, but their wires and brackets make it difficult to brush and floss, and they're not particularly attractive. Clear aligners solve both of these issues, though they may not handle more complex malocclusions as well as braces.
Palatal expanders. When the upper jaw develops too narrowly, a malocclusion may result from teeth crowding into too small a space. But before the upper jaw bones fuse together in late childhood, orthodontists can fit a device called a palatal expander inside the upper teeth, which exerts gentle outward pressure on the teeth. This encourages more bone growth in the center to widen the jaw and help prevent a difficult malocclusion from forming.
Specialized braces for impacted teeth. An impacted tooth, which remains partially or completely hidden in the gums, can impede dental health, function and appearance. But we may be able to coax some impacted teeth like the front canines into full eruption. This requires a special orthodontic technique in which a bracket is surgically attached to the impacted tooth's crown. A chain connected to the bracket is then looped over other orthodontic hardware to gradually pull the tooth down where it should be.
Although some techniques like palatal expanders are best undertaken in early dental development, people of any age and reasonably good health can have a problem bite corrected with other methods. If you are among those who benefit from orthodontics, you'll have something in common with the Sovereign of the British Isles: a healthy, attractive and straighter smile.