Posts for: May, 2015
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.
A woman as gorgeous and funny as Sofia Vergara surely planned to be a model and actress from the get-go, right? Wrong! Sofia’s first career choice actually was to be… a dentist! That’s right, the sexy star of TV’s Modern Family actually was only two semesters shy of finishing a dental degree in her native Columbia when she traded dental school for the small screen. Still, dental health remains a top priority for the actress and her son, Manolo.
“I’m obsessed,” she recently told People magazine. “My son thinks I’m crazy because I make him do a cleaning every three months. I try to bribe the dentist to make him to do it sooner!”
That’s what we call a healthy obsession (teeth-cleaning, not bribery). And while coming in for a professional cleaning every three months may not be necessary for everyone, some people — especially those who are particularly susceptible to gum disease — may benefit from professional cleanings on a three-month schedule. In fact, there is no one-size-fits-all approach to having professional teeth cleanings — but everyone needs this beneficial procedure on a regular basis.
Even if you are meticulous about your daily oral hygiene routine at home, there are plenty of reasons for regular checkups. They include:
- Dental exam. Oral health problems such as tooth decay and gum disease are much easier — and less expensive — to treat in the earliest stages. You may not have symptoms of either disease early on, but we can spot the warning signs and take appropriate preventive or restorative measures.
- Oral cancer screening. Oral cancer is not just a concern of the middle aged and elderly — young adults can be affected as well (even those who do not smoke). The survival rate for this deadly disease goes up tremendously if it is detected quickly, and an oral cancer screening is part of every routine dental visit.
- Professional teeth cleaning. Calcified (hardened) dental plaque (tartar or calculus) can build up near the gum line over time — even if you brush and floss every day. These deposits can irritate your gums and create favorable conditions for tooth decay. You can’t remove tartar by flossing or brushing, but we can clear it away — and leave you with a bright, fresh-feeling smile!
So take a tip from Sofia Vergara, and don’t skimp on professional cleanings and checkups. If you want to know how often you should come in for routine dental checkups, please contact us or schedule an appointment for a consultation. You can learn more in the Dear Doctor articles “Dental Hygiene Visit” and “Dental Cleanings Using Ultrasonic Scalers.”