Posts for: June, 2020
It takes a lot of skill, experience, talent and artistry to create tooth restorations that look so natural that no one can tell them apart from the originals. To do so requires understanding of the normal anatomy of a tooth as well as of the interactions of light and color.
How the anatomy of a tooth determines color
The color that we perceive when looking at a tooth results from the combined appearance of the tooth’s center core (dentin layer) and its covering enamel. Going from the outside in, the enamel is made of tightly packed crystals of calcium, which cause it to be one of the hardest substances naturally produced by animals. The crystals are also responsible for a tooth’s brilliance and translucence. The dentin is more like bone, a porous living tissue composed of microscopic tubes, interspersed with more calcium crystals. In the very center of the tooth is a central chamber containing the pulp and nerves.
Each of these layers has its own physical and optical properties. Since the enamel is translucent and the dentin is more opaque, most of the tooth’s color comes from the dentin and is transmitted through the enamel layer. Factors that affect this transmission include the thickness and age of the enamel as well as external tooth whitening.
If the enamel is more translucent, more of the color of the dentin shows through. If it is more opaque, the enamel absorbs and reflects light so that less color is visible and the enamel looks brighter.
The language of color composition and reflected light
Color means the whole spectrum in the rainbow. The spectrum is made up of the three primary colors — red, blue, and green. When all are combined, they create white light.
Hue refers to the brightest forms of the colors. The color we perceive depends on the dominant wavelength of light that is reflected by an object.
Value refers to a color’s lightness or darkness. A brighter color has a higher value.
Chroma is the amount of identifiable hue in a color. An achromatic color (without hue) appears gray.
Saturation is a measure of a color’s intensity.
This terminology of color is used not only by dentists and dental technicians, but also by a wide range of artists. It implies expertise and understanding of how colors work, how they vary and change and affect one another.
Contact us today to schedule an appointment or to discuss your questions about bonding to repair chipped teeth. You can also learn more by reading the Dear Doctor article, “Artistic Repair of Front Teeth with Composite Resin.”
If you suffer frequent sinus infections, you might want to talk with your dentist about it. It could be your chronic sinus problems stem from a deeply decayed or infected tooth.
Sinuses are hollow, air-filled spaces in the front of the skull associated with nasal passages. The largest, the maxillary sinuses, are located just behind the cheekbones and above and to the rear of the upper jaw on either side of the face. These sinuses can become painfully congested when infected.
One possible cause for an infection in the maxillary sinus can occur in certain people whose upper back teeth (the molars and premolars) have roots that are close to or even protrude into the sinus. This is normally a minor anatomical feature, unless such a tooth becomes infected.
An infection in teeth with advancing decay or whose nerve tissue has died will eventually reach the root tip through tiny passageways called root canals. If the roots are close to or penetrating the maxillary sinus, the infection could move into the sinus. This is known as Maxillary Sinusitis of Endodontic Origin (MSEO).
A case of MSEO could potentially go on for years with occasional flare-ups of sinus congestion or post-nasal drip. Because of the nature of the infection within the sinus, the affected tooth itself may not show the normal signs of infection like sensitivity or pain. Doctors may attempt to treat the sinus infection with antibiotics, but because the actual source of the infection is within the tooth, this therapy is often ineffective.
If your doctor or dentist suspects MSEO, they may refer you to an endodontist, a specialist in root canals and interior tooth problems. With their advanced diagnostic capabilities, endodontists may have a better chance of accurately diagnosing and locating the source of a tooth-related infection.
As with any non-vital tooth, the likely treatment will be root canal therapy in which the infected tissue within the tooth is removed and the empty spaces filled to prevent future infection. For MSEO, the treatment not only preserves the tooth but may also relieve the infection within the sinus.
Eating is like breathing: We often do it without much thought. But if you suffer from chronic jaw pain, every bite can get your attention—and not in a good way. What's worse, in an effort to avoid the pain associated with a temporomandibular joint disorder (TMD) you might make less than nutritious food choices.
But there are ways to eat healthy without aggravating the symptoms of TMD—not just your choices of food, but also how you prepare and actually eat the food. Here are 4 tips that can help you manage eating with TMD.
Choose moist foods in sauces or gravy. A lot of chewing action is intended to mix saliva with tough or dry foods to make them easier to digest. But this extra jaw action can irritate the jaw joints and muscles and increase your discomfort. To help reduce your jaws' work load, choose foods with a high moisture content, or cook them in a sauce or gravy.
Peel foods with skin. Fresh fruits and vegetables are an excellent source of vitamins and minerals, but their tough outer skin or peel is often hard to chew. Although these parts may also contain nutrients, removing them allows you to gain most of the nutritional benefit of the food while making it easier to chew it.
Cut foods into bite-size pieces. A lot of discomfort with TMD occurs with having to open the jaws wide to accommodate large pieces of food. To minimize the amount of jaw opening, take time to cut all your food portions down into smaller pieces. Doing so can help you avoid unnecessary discomfort.
Practice deliberate eating. All of us can benefit from slower, more methodical eating, but it's especially helpful for someone with TMD. By chewing deliberately and slowly and doing your best to limit jaw opening, you can enhance your comfort level.
Eating often becomes an arduous task for someone with TMD that increases pain and stress. But practicing these tips can make your dining experience easier—and more enjoyable.
If you would like more information on managing TMD in everyday life, 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 “What to Eat When TMJ Pain Flares Up.”