Posts for: June, 2019
While braces are often the stars for straightening smiles, they're not the only cast members in an orthodontic production. Orthodontists occasionally turn to other appliances if the bite problem is challenging. Whatever the tool, though, they usually have something in common—they use the principle of anchorage.
To understand anchorage, let's first consider the classic kid's game Tug of War. With teams on either end of a rope, the object is to pull the opposing team across the center line before they pull you. To maximize your pulling force, the player at the back of your rope, usually your stoutest member, holds steady or "anchors" the rest of the team.
Like a Tug of War team, braces exert force against the teeth. This stimulates the supporting periodontal ligament to remodel itself and allow the teeth to move. The braces use the teeth they are attached to as anchors, which in a lot of cases are the back teeth. By attaching a thin wire to the brackets or braces on the teeth, the orthodontist includes all the teeth on the arch, from one end to the other. Anchored in place, the wire can maintain a constant pressure against the teeth to move them.
But not all bite situations are this straightforward. Sometimes an orthodontist needs to influence jaw growth in addition to teeth movement. For this purpose, they often use orthodontic headgear, which runs around the back of the head or neck and attaches to orthodontic brackets on the teeth. It still involves an anchor but in this case it's the patient's own skull.
In some situations, an orthodontist may feel he or she needs more anchorage as the teeth alone may not be enough. For this, they might establish a separate or additional anchor point using a temporary anchorage device (TAD). A TAD resembles a tiny screw that's inserted into the jawbone near the tooth intended for movement. The orthodontist can then attach the TAD to braces hardware using some form of elastics. After treatment, they remove the TAD.
These are just a couple examples of specialized tools an orthodontist can use for bite correction. Thanks to them and similar devices, even the most complex bite problem can be overcome to create a healthier and more attractive smile.
If you would like more information on correcting a poor bite, 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 “Orthodontic Headgear & Other Anchorage Appliances.”
If you have chronic jaw pain, you may be one of an estimated 10 million Americans suffering from temporomandibular joint disorders (TMD). If so, it's quite possible you're also coping with other health conditions.
TMD is an umbrella term for disorders affecting the temporomandibular (jaw) joints, muscles and adjoining tissues. The most common symptoms are limited jaw function and severe pain. Determining the causes for these disorders can be difficult, but trauma, bite or dental problems, stress and teeth clenching habits seem to be the top factors. Women of childbearing age are most susceptible to these disorders.
In recent years we've also learned that many people with TMD also experience other conditions. In a recent survey of TMD patients, two-thirds reported having three or more other health conditions, the most frequent being fibromyalgia, chronic fatigue syndrome, rheumatoid arthritis or chronic headaches. Researchers are actively exploring if any systemic connections exist between TMD and these other conditions, and how these connections might affect treatment changes and advances for all of them including TMD.
In the meantime, there remain two basic approaches for treating TMD symptoms. The most aggressive and invasive approach is to surgically correct perceived defects in the jaw structure. Unfortunately, the results from this approach have been mixed in their effectiveness, with some patients even reporting worse symptoms afterward.
The more conservative approach is to treat TMD orthopedically, like other joint problems. These less invasive techniques include the use of moist heat or ice to reduce swelling, physical therapy and medication to relieve pain or reduce muscle spasming. Patients are also encouraged to adopt softer diets with foods that are easier to chew. And dentists can also provide custom-fitted bite guards to help ease the stress on the joints and muscles as well as reduce any teeth grinding habits.
As we learn more about TMD and its relationship to other health conditions, we hope to improve diagnosis and treatment. Until then, most dentists and physicians recommend TMD patients try the more conservative treatments first, and only consider surgery if this proves unsatisfactory. It may take some trial and error, but there are ways now to ease the discomfort of TMD.
If you would like more information on the causes and treatments of TMD, 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 “Chronic Jaw Pain and Associated Conditions.”
X-ray imaging is such an intricate part of dentistry, we usually don't think twice about it. Without it, though, the fight against dental disease would be much harder.
At the same time, we can't forget that x-rays are a form of electromagnetic radiation that can penetrate human tissue. It's that very quality and the difference in the absorption rate between denser bone and teeth and softer diseased tissue that makes disease diagnosis possible.
But this same penetrative power can potentially harm the tissues it passes through. For that reason when practicing any form of x-ray diagnostics, dentists follow a principle known as ALARA, an acronym for "As Low As Reasonably Achievable." In lay terms ALARA means getting the most benefit from x-rays that we can with the lowest dose and exposure time possible.
While practicing ALARA with x-rays is important for patients of any age, it's especially so for children who are more sensitive to radiological energy given their smaller size and anatomy. We can't use the same settings, dosages or exposure times with them as with an adult.
To protect children, dentists have developed techniques and protocols that lessen their exposure time and rate, while still providing usable images for diagnosing disease. The bitewing is a good example of safe and effective pediatric x-ray imaging.
A bitewing is a plastic device holding exposable film that patients bite down on and hold in their mouth while x-raying. The x-rays pass through the teeth and gums and expose the film behind them on the bitewing. Using a bitewing we can capture a set of two to four radiographs to give us a comprehensive view of the back teeth, while exposing the child less radiation than they normally receive daily from background environmental sources.
This and other advances in equipment and digital imaging greatly reduce the amount of radiation patients receive during x-rays. If, though, you're still concerned about your child's x-ray exposure, talk with your dentist who can explain in more detail the x-ray safety protocols they follow. Just like you, they want your child to be as safe as possible while still benefiting from the diagnostic power of x-rays.
If you would like more information on safety precautions using 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.”