Dental Arts of Wyomissing Blog
Posts for tag: x-rays
X-rays are such a routine part of dental care that it's easy to overlook how much this technology has revolutionized detecting and treating tooth decay. It's safe to say x-rays have helped save hundreds of millions of teeth over the last hundred years.
Thanks to its unique properties these invisible electro-magnetic waves give us precise images of the interior structure of teeth and gums. It's so precise that we can clearly detect even a small spot of softened, decayed tooth structure on an exposed x-ray film, often before it becomes visible to the naked eye. As a result, we can begin treating the decay earlier, minimizing the damage and increasing the chances for preserving the tooth.
There are a variety of ways we can utilize x-ray technology in diagnosing dental problems. The one, though, that's used the most is called the bitewing. The name comes from wing-like tabs extending out from a thin frame holding a segment of unexposed film. A technician places the frame inside the patient's mouth with the film on the tongue side of the teeth, and has them bite down on the tabs to hold the frame still. They then aim a camera at the patient's outer cheek, which then emits a very short burst of x-ray energy to expose the film.
Bitewings are popular because they give a full view of the back and side teeth, where decay is often hard to detect, with very little radiation exposure to the patient. And as x-ray technology has progressed over the years with digital processing and more efficient equipment, we can acquire sharper images with even less exposure. We've also developed standard protocols for when and how often we perform x-rays, so that we're getting the most diagnostic benefit for the least amount of exposure time.
Those few minutes getting an x-ray may seem routine, but the benefits to your dental health are truly amazing. The bitewing and other forms of x-rays play a huge role in helping us keep your teeth as healthy as they possibly can.
If you would like more information on x-ray diagnostics, 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 “Bitewing X-Rays.”
X-ray imaging is a routine part of a child's dental care — and it undeniably makes a difference in preventing and treating dental disease. It's so routine, we can easily forget they're being exposed to an invisible form of electromagnetic radiation.Â And just like other sources of radiation, too much x-ray exposure could increase the risk of cancer.
But while it's possible for your child to be over-exposed to x-rays, it's highly unlikely. That's because healthcare professionals like dentists adhere to a standard known as ALARA when considering and administering x-rays. ALARA is an acronym for “as low as reasonably achievable.” In other words, we only want to expose a patient to the lowest and safest levels of x-ray dosage and frequency that will achieve the most benefit.
To achieve that standard, professional dental organizations advocate the use of x-rays only after a clinical examination of the patient, as well as a thorough review of their medical history for any usage of x-rays for other conditions. If x-rays are warranted, we then take further precautions to protect the patient and staff, and only use the type of x-ray application that's absolutely necessary. For most children that will be a set of two or four bitewing radiographs, which are quite effective for detecting decay in back teeth.
This dosage of radiation in a session of bitewing radiographs is roughly a fifth of the background radiation in the environment a child may be exposed to every day. By spacing these sessions at least six months apart, we're able to achieve a high level of decay detection at a safe and reasonable amount of x-ray exposure.
On top of that, the digital advances in x-ray imaging have reduced the amount of radiation energy needed to achieve the same results as we once did with film. These lower exposure levels and the ALARA standard helps ensure your child's exposure to x-rays will be well within safe limits.
If you would like more information on the use of x-rays with children, 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 “X-Ray Safety for Children.”
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.