Posts for: September, 2019
One of the most widely used forms of dental imaging is the bitewing x-ray. So called because of the shape of the device that holds the exposable film a patient clenches between their back teeth, the bitewing x-ray is an effective means for detecting the earliest stages of tooth decay.
These early signs are small lesions on a tooth surface caused by mineral loss in the enamel. While we can identify them on front teeth through visual examination or bright lighting, they’re nearly impossible to see on the biting surfaces of back teeth. The bitewing x-ray solves this problem.
During the procedure, a narrow beam of x-rays is directed at the back teeth area. Since X-rays can transmit through solid matter, they pass through the teeth and gums to expose the film attached to the bitewing assembly.
X-rays pass through matter at different rates depending on the density of the tissue — a slower rate for harder tissues like teeth and bone and a faster rate for soft tissues like the gums. As a result, x-rays through teeth expose less of the film and appear as a lighter image than the gums. This difference is so precise even a tooth’s softer dentin appears slighter darker than its harder outer enamel.
This precision helps us identify decay lesions. Because the lesions on the enamel are less dense than the normal enamel, they’ll appear as dark spots. By detecting them at this stage we have a better chance for reversing the effects of decay or at least minimizing damage that’s already occurred.
Because x-rays emit radiation, there’s a natural concern about over-exposure and we go to great lengths to reduce it. Children may undergo a bitewing x-ray twice a year for developing teeth, while adults with healthy teeth are typically x-rayed just once a year. Advances in digital film and other technology have also helped lower the exposure rate.
Today’s standard 4-film bitewing x-ray produces about four days worth of what we receive on average from normal background radiation, so the health risk is quite negligible. The benefit, on the other hand, is much greater — the early detection of tooth decay could ultimately save a tooth.
Your mouth is teeming with bacteria—millions of them. But don't be alarmed: Most are benign or even beneficial. There are, however, some bacteria that cause tooth decay or periodontal (gum) disease, which can damage your oral health.
These disease-causing bacteria feed and multiply within a thin biofilm of leftover food particles on tooth surfaces called dental plaque. To reduce these bacterial populations—and thus your disease risk—you'll need to keep plaque from building up through daily brushing and flossing.
Now, there's brushing and flossing—and then there's effective brushing and flossing. While both tasks are fairly simple to perform, there are some things you can do to maximize plaque removal.
Regarding the first task, you should brush once or twice a day unless your dentist advises otherwise. And "Easy does it" is the rule: Hard, aggressive scrubbing can damage your gums. A gentle, circular motion using a good quality toothbrush will get the job done. Just be sure to brush all tooth surfaces, including the nooks and crannies along the biting surfaces. On average, a complete brushing session should take about two minutes.
You should also floss at least once a day. To begin with, take about 18" of thread and wrap each end around an index or middle finger. Pulling taut and using your thumbs to help maneuver the thread, ease the floss between teeth. You then wrap it around each tooth side to form a "C" shape and gently slide the floss up and down. Continue on around until you've flossed between each tooth on both jaws.
You can get a rough idea how well you did after each hygiene session by rubbing your tongue against your teeth—they should feel slick and smooth. If you feel any grittiness, some plaque still remains. Your dentist can give you a more precise evaluation of your cleaning effectiveness at your regular dental visits. This is also when they'll clean your teeth of any missed plaque and tartar.
While professional dental cleanings are important, what you do every day to remove plaque is the real game changer for optimum oral health. Becoming a brushing and flossing "ninja" is the best way to keep your healthy smile.
If you would like more information on daily oral care, 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 “Daily Oral Hygiene: Easy Habits for Maintaining Oral Health.”
Compared to other dental restorations—a few of which have been around for over a century—implants are a relatively recent development. But even though it's just now entering its fourth decade, recent advances have catapulted implant therapy well beyond where it began.
That's due mainly to digital technology. Two examples of this, computed tomography (CT) and 3-D printing, are increasing the accuracy and efficiency of implant placement.
Properly placing an implant is one of the most important elements in achieving a natural and attractive result. But finding the best location is often difficult due to a lack of suitable bone volume, the patient's bite or the proximity of anatomical structures like nerves and blood vessels. CT imaging, especially Cone Beam CT scanners (CBCT), is helping to make implant placement planning easier.
Unlike the static, two-dimensional views of standard x-rays, CBCT takes hundreds of images and digitally blends them together to create a virtual 3-D model of the patient's jaw and face. Dentists can view this highly detailed model on a computer monitor from various vantage points and better identify possible obstructions. With better information about what "lies beneath," they can more accurately pinpoint the best implant site.
Creating the ideal plan is one thing—successfully implementing it is another. Dentists often create a surgical guide that helps them drill in precisely the right positions during surgery. The guide, which resembles a mouthguard, fits over the gums and contains marker locations for drilling.
Many dentists are now using 3-D printing to create these surgical guides. A 3-D printer turns a digital model of the guide based on measurements of the patient's mouth and proposed implant locations into an actual physical object "printed out" layer by layer of special polymer material. The end product can be more precise than guides created by other means.
These and other technological developments are helping implant therapy rise to a new level of success. With the resulting increase in accuracy, efficiency and less treatment time, tomorrow's implant patients will be the ultimate beneficiaries.
If you would like more information on restoring missing teeth with dental implants, 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 “How Technology Aids Dental Implant Therapy.”