Posts for category: Dental Procedures
The traditional way to restore a tooth with an artificial crown takes several weeks and multiple office visits: from tooth preparation and impression molding to crown production by a dental laboratory, followed by adjustments and cementing. Now, there’s an alternative that reduces this process to a fraction of the time, and all from your dentist’s office.
Computer-Aided Design/Computer-Aided Manufacturing (CAD/CAM) is a digital system that enables dentists to create dental restorations with laboratory-grade materials in minutes rather than weeks. As it continues to innovate, you’ll see more and more dentists investing in the new technology for their patients.
A crown restoration with CAD/CAM begins like any other with decay removal and preparation of the tooth. It diverges, though, from the traditional in how an impression of your teeth and gums is obtained: instead of rubber-like molding materials to create a physical impression, we lightly dust the mouth interior with a reflective powder. Using a scanning wand, the reflective powder allows us to capture multiple, detailed images of your mouth that the CAD/CAM computer transforms into an accurate three-dimensional model.
We use the model to first assess if the tooth has been effectively prepared for a restoration. If so, the design feature of the system will provide us with thousands of tooth forms to choose from to match with your natural teeth. You’ll be able to view the proposed size and shape of the new crown via computer simulation before signing off on the design.
Next is the actual manufacture of the crown that takes place right in the dentist’s office. A pre-formed block of ceramic material is inserted in the milling equipment where, following the pre-determined computer design, the milling heads carve the ceramic block. After milling, we fine-tune the crown surface and apply stains or glazes fired to create a life-like color and texture that matches your natural teeth. We can then adjust the crown in your mouth and permanently affix it to the tooth.
While much of the CAD/CAM system is automated, ultimate success still depends on the dentist’s expertise and artistry. CAD/CAM enhances those skills with greater precision and in much less time than traditional crowns. It’s certainly a growing option for many people to restore the form and function of decayed teeth.
If you would like more information on computer-aided dental restorations, 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 “Creating In-Office Dental Restorations with Computers.”
All crowns are designed to restore functionality to a damaged tooth. But crowns can differ from one another in their appearance, in the material they’re made from, and how they blend with other teeth.
A crown is a metal or porcelain artifice that’s bonded permanently over a decayed or damaged tooth. Every crown process begins with preparation of the tooth so the crown will fit over it. Afterward, we make an impression of the prepared tooth digitally or with an elastic material that most often is sent to a dental laboratory to create the new crown.
It’s at this point where crown composition and design can diverge. Most of the first known crowns were made of metal (usually gold or silver), which is still a component in some crowns today. A few decades ago dental porcelain, a form of ceramic that could provide a tooth-like appearance, began to emerge as a crown material. The first types of porcelain could match a real tooth’s color or texture, but were brittle and didn’t hold up well to biting forces. Dentists developed a crown with a metal interior for strength and a fused outside layer of porcelain for appearance.
This hybrid became the crown design of choice up until the last decade. It is being overtaken, though, by all-ceramic crowns made with new forms of more durable porcelain, some strengthened with a material known as Lucite. Today, only about 40% of crowns installed annually are the metal-porcelain hybrid, while all-porcelain crowns are growing in popularity.
Of course, these newer porcelain crowns and the attention to the artistic detail they require are often more expensive than more traditional crowns. If you depend on dental insurance to help with your dental care costs, you may find your policy maximum benefit for these newer type crowns won’t cover the costs.
If you want the most affordable price and are satisfied primarily with restored function, a basic crown is still a viable choice. If, however, you would like a crown that does the most for your smile, you may want to consider one with newer, stronger porcelain and made with greater artistic detail by the dental technician. In either case, the crown you receive will restore lost function and provide some degree of improvement to the appearance of a damaged tooth.
In an instant, an accident could leave you or a loved one with a missing tooth. Thankfully, we can restore it with a dental implant that looks and functions like a real tooth—and the sooner the better.
But if the patient is a teenager or younger, sooner may have to be later. Because their jaws are still developing, an implant placed now could eventually look as if it's sinking into the gums as the jaw continues to grow and the implant doesn't move. It's best to wait until full jaw maturity around early adulthood and in the meantime use a temporary replacement.
But that wait could pose a problem with bone health. As living tissue, bone cells have a life cycle where they form, function and then dissolve (resorption) with new cells taking their place. This cycle continues at a healthy rate thanks to stimulation from forces generated by the teeth during chewing that travel through the roots to the bone.
When a tooth goes missing, however, so does this stimulation. Without it the bone's growth cycle can slow to an unhealthy rate, ultimately reducing bone volume. Because implants require a certain amount of bone for proper placement and support, this could make it difficult if not impossible to install one.
We can help prevent this by placing a bone graft immediately after the removal of a tooth within the tooth's "socket." The graft serves as a scaffold for new bone cells to form and grow upon. The graft will eventually resorb leaving the newly formed bone in its place.
We can also fine-tune and slow the graft's resorption rate. This may be preferable for a younger patient with years to go before their permanent restoration. In the meantime, you can still proceed with other dental treatments including orthodontics.
By carefully monitoring a young patient's bone health and other aspects of their dental care, we can keep on course for an eventual permanent restoration. With the advances in implantology, the final smile result will be worth the wait.
If you would like more information on dental care for trauma injuries, 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 “Dental Implants for Teenagers: Factors Influencing Treatment Planning in Adolescents.”
If you're one of the more than 26 million people in the U.S. with diabetes, you know first hand how the disease impacts your life. That includes your dental health — and whether or not implants are a good tooth replacement option for you.
Diabetes is actually the name for a group of diseases affecting how your body processes glucose, a simple sugar that provides energy for the body's cells. The level of glucose in the blood is regulated by insulin, a hormone produced in the pancreas. Diabetes causes the pancreas to either stop producing insulin (Type 1) or not produce enough (Type 2). Also in Type 2, the body can become unresponsive to the insulin produced.
The implications for either type are serious and can be life-threatening. If glucose levels are chronically too low or high the patient could eventually go blind, suffer nerve damage, or develop kidney disease. Diabetes also interferes with wound healing and creates a greater susceptibility for gangrene: diabetics thus have a higher risk for losing fingers, toes and limbs, and can even succumb to coma or death.
Type 2 is the most common form of diabetes. Fortunately, most people with this type can effectively manage it through diet, exercise and regular glucose monitoring; if need be, prescription medication can help regulate their levels. Even so, diabetics with their disease under control must still be alert to slower wound healing and a higher risk of infection.
Because implant placement is a minor surgical procedure, the aspects of diabetes related to healing, infection and inflammation could have an adverse impact on the ultimate success of the placement. Implant surgery creates a wound in the surrounding gum tissues and bone that will need to heal; the body's immune response in a diabetic can interfere with that process. And if infection sets in, the risks of implant failure increase.
But research has shown that diabetics with good glucose management have as high a success rate (over 95% after ten years) as non-diabetic patients. That means the implant option is a viable one for you as a diabetic — but only if you have your disease under control.
So, you’ve just acquired an attractive restoration with dental implants. You may be thinking at least with these teeth you won’t have to worry about dental disease.
Think again. While the implants and their porcelain crowns are impervious to decay the surrounding gums and bone are still vulnerable to infection. In fact, you could be at risk for a specific type of periodontal (gum) disease called peri-implantitis (inflammation around the implant).
Bacterial plaque, the thin bio-film most responsible for gum disease, can build up on implant crowns just as it does on natural tooth surfaces. If it isn’t removed with daily brushing and flossing and regular dental cleanings the bacteria can trigger an infection in the gums.
Besides weakening gum tissues, gum disease can also cause bone loss, of critical importance to dental implants. An implant depends on the bone they’re inserted in to hold them in place. If the bone around an implant becomes infected it could begin to be lost or dissolve (resorb), which could lead to loss of the implant.
That’s why it’s critical to keep the natural tissue structures supporting your implants infection-free. Not only is daily hygiene a must, but your implants and any remaining natural teeth should undergo professional cleaning at least twice a year or more if your dentist recommends it.
Cleanings involving implants will also be a bit different from natural teeth. While the dental materials used in the crown and implant post are quite durable, regular cleaning instruments can scratch them. Although tiny, these scratches can become hiding places for bacteria and increase your risk of infection.
To avoid this, your hygienist will use instruments (known as scalers and curettes) usually made of plastics or resins rather than metal. The hygienist may still use metal instruments on your remaining natural teeth because their enamel can tolerate metal without becoming scratched creating a smoother surface.
While keeping implants clean can sometimes be a challenge, it’s not impossible. Implants on average have a long-term success rate above 95%. With both you and your dentist caring and maintaining these state-of-the-art restorations, you may be able to enjoy them for decades.
If you would like more information on caring for 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 “Dental Implant Maintenance: Implant Teeth must be Cleaned Differently.”