Posts for: June, 2018
The CAT scan is a relatively recent technique in dentistry, used to get an image of what’s happening deep within your jaws. You may be wondering what a CAT scan tells us that a conventional x-ray picture does not, and whether it is worth the extra expense to get one. And how does a CAT scan compare with a conventional x-ray in terms of radiation exposure?
CAT stands for “computer assisted tomography.” Often it’s just called a CT scan, for “computerized tomography.” The word “tomography” comes from roots meaning “slice” and “write.” Tomographic techniques take repeated two dimensional pictures, similar to repeatedly slicing through an object, and then assembles them with a computer to produce a three dimensional (3-D) image.
The latest type of CT scan used in dentistry is called CBCT, or Cone Beam Computed Tomography. The Cone Beam refers to a spiral beam of x-rays, which is used to create a series of two dimensional images from which a computer creates a 3-D image. Such an image is of great value in assessing problems and planning treatment.
Here are just a few examples of how a CBCT scan can be used. Orthodontists can see skeletal structures and developing teeth that are still inside the jawbone while planning strategies for directing the teeth in order to arrive at a better bite. Oral surgeons can find impacted or missing teeth, see their locations, and view their proximity to nerves and sinuses, assisting them in planning surgeries. These scans are particularly useful for root canal specialists because they show root canals that are less than a millimeter wide and even reveal accessory canals that may not be visible on conventional x-rays. In cases of sleep disorders such as sleep apnea, a CBCT during sleep can be used to view a person’s airway and how it may be blocked by the tongue and other soft tissues in a person’s throat during sleep.
Compared to background radiation, the amount of radiation delivered in dental x-rays is minimal. A CBCT delivers a dose of radiation that is less than a typical full mouth x-ray series but more than a typical two dimensional panoramic radiograph. Generally CBCT scanners deliver lower doses than medical CT scanners.
With one low-dose CBCT scan, we can get an accurate idea of the internal structure of your bones and teeth and how they are situated in relation to each other. Prior to the availability of such images, many of these relationships had to be discovered in the course of a surgery or other treatment. Thus such a scan can aid greatly in the quality of treatment you will receive.
We’re all familiar with “naughty” and “nice” lists for food: “nice” items are beneficial or at least harmless; on the other hand, those on the “naughty” list are not and should be avoided. And processed sugar has had top billing on many people’s “naughty” list for some time now.
And for good reason: it’s linked to many physical ills including obesity, diabetes and heart disease. As a favorite food for oral bacteria that cause dental disease, sugar can also increase your risk for tooth decay or periodontal (gum) disease.
Most people agree that reducing sugar in their diet is a great idea health-wise. But there’s one small problem: a great many of us like sugar—a lot. No matter how hard we try, it’s just plain difficult to avoid. Thanks perhaps to our ancient ancestors, we’re hard-wired to crave it.
But necessity is the mother of invention, which is why we’ve seen the development over the past half century of artificial sweeteners, alternatives to sugar that promise to satisfy people’s “sweet tooth” without the harmful health effects. When it comes to dental health, these substitute sweeteners won’t contribute to bacterial growth and thus can lower disease risk.
But are they safe? Yes, according to the U.S. Food and Drug Administration (FDA). The agency has approved six types of artificial sweeteners for human consumption: acesulfame K, saccharin, aspartame, neotame, sucralose and rebaudioside A. According to the FDA any adverse effects caused by artificial sweeteners are limited to rare conditions like phenylketonuria, which prevents those with the disease from safely digesting aspartame.
So, unless you have such a condition, you can safely substitute whatever artificial sweetener you prefer for sugar. And if dental health is a particular concern, you might consider including xylitol. This alcohol-based sweetener may further deter tooth decay—bacteria can’t digest it, so their population numbers in the mouth may actually decrease. You’ll find xylitol used as a sweetener primarily in gums, candies and mints.
Reducing sugar consumption, couple with daily oral hygiene and regular dental visits, will certainly lower your risk of costly dental problems. Using a substitute sweetener might just help you do that.
If you would like more information on sweetener alternatives, please contact us or schedule an appointment for a consultation. You can also learn more about this topic by reading the Dear Doctor magazine article “Artificial Sweeteners.”
On the big screen, Australian-born actress Margot Robbie may be best known for playing devil-may-care anti-heroes—like Suicide Squad member Harley Quinn and notorious figure skater Tonya Harding. But recently, a discussion of her role in Peter Rabbit proved that in real life, she’s making healthier choices. When asked whether it was hard to voice a character with a speech impediment, she revealed that she wears retainers in her mouth at night, which gives her a noticeable lisp.
“I actually have two retainers,” she explained, “one for my bottom teeth which is for grinding my teeth, and one for my top teeth which is just so my teeth don't move.”
Clearly Robbie is serious about protecting her dazzling smile. And she has good reasons for wearing both of those retainers. So first, let’s talk about retainers for teeth grinding.
Also called bruxism, teeth grinding affects around 10 percent of adults at one time or another, and is often associated with stress. If you wake up with headaches, sore teeth or irritated gums, or your sleeping partner complains of grinding noises at night, you may be suffering from nighttime teeth grinding without even being aware of it.
A type of retainer called an occlusal guard is frequently recommended to alleviate the symptoms of bruxism. Typically made of plastic, this appliance fits comfortably over your teeth and prevents them from being damaged when they rub against each other. In combination with stress reduction techniques and other conservative treatments, it’s often the best way to manage teeth grinding.
Orthodontic retainers are also well-established treatment devices. While appliances like braces or aligners cause teeth to move into better positions, retainers are designed to keep teeth from moving—helping them to stay in those positions. After active orthodontic treatment, a period of retention is needed to allow the bite to stabilize. Otherwise, the teeth can drift right back to their old locations, undoing the time and effort of orthodontic treatment.
So Robbie has the right idea there too. However, for those who don’t relish the idea of wearing a plastic appliance, it’s often possible to bond a wire retainer to the back surfaces of the teeth, where it’s invisible. No matter which kind you choose, wearing a retainer can help keep your smile looking great for many years to come.
If you have questions about teeth grinding or orthodontic retainers, please contact our office or schedule a consultation. You can read more in the Dear Doctor magazine articles “Teeth Grinding” and “The Importance of Orthodontic Retainers.”