Posts for: January, 2020
Dental amalgam—also known as “silver fillings”—has been used for nearly a hundred years to treat cavities. There are several reasons why this mixture of metals has been the go-to material among dentists: Malleable when first applied, dental amalgam sets up into a durable dental filling that can take years of biting forces. What’s more, it’s stable and compatible with living tissue.
But there’s been growing concern in recent years about the safety of dental amalgam, with even some wondering if they should have existing fillings replaced. The reason: liquid mercury.
Mercury makes up a good portion of dental amalgam’s base mixture, to which other metals like silver, tin or copper are added to it in powder form. This forms a putty that can be easily worked into a prepared cavity. And despite the heightened awareness of the metal’s toxicity to humans, it’s still used in dental amalgam.
The reason why is that there are various forms of mercury and not all are toxic. The form making headlines is known as methylmercury, a compound created when mercury from the environment fuses with organic molecules. The compound builds up in the living tissues of animals, particularly large ocean fish, which have accumulated high concentrations passed up through their food chain.
That’s not what’s used in dental amalgam. Dentists instead use a non-toxic, elemental form of mercury that when set up becomes locked within the amalgam and cannot leach out. Based on various studies, treating cavities with it poses no health risks to humans.
This also means there’s no medical reason for having an existing silver fillings removed. Doing so, though, could cause more harm than good because it could further weaken the remaining tooth structure.
The most viable reason for not getting a dental amalgam filling is cosmetic: The metallic appearance of amalgam could detract from your smile. There are newer, more life-like filling options available. Your dentist, though, may still recommend dental amalgam for its strength and compatibility, especially for back teeth. It’s entirely safe to accept this recommendation.
There are a lot of reasons (including a blow to the mouth) why one of your permanent teeth might become loose. The most common: advanced periodontal (gum) disease that has weakened the gum attachment to the tooth.
There's also another, less common reason: you have a grinding habit that's producing higher than normal biting forces. Besides accelerating tooth wear, the constant jaw movement and teeth clenching can stretch periodontal ligaments and loosen their attachment to a tooth.
If the gums are disease-free, teeth grinding is most likely the main culprit for the damage, what we call primary occlusal trauma. Our treatment goal here is to reduce the effect of the grinding habit and, if necessary, secure the teeth with splinting while the ligaments heal. We can often reduce the grinding effect with a custom bite guard worn while you sleep. We may also prescribe minor muscle relaxants and mild pain medication like aspirin or ibuprofen.
Sometimes we may need to perform other measures like re-shaping your teeth's biting surfaces so they don't generate as much biting force. You may also benefit from counseling or other psychological treatment to help you address and cope with stress, a prime driver for teeth grinding.
Even if you don't have a grinding habit, biting forces may still contribute to tooth looseness if you have advanced gum disease. Advanced disease results in excessive bone loss, which in turn reduces the remaining amount of ligaments attached to the tooth. This type of damage, known as secondary occlusal trauma, and ensuing tooth looseness can occur even when your biting forces are normal.
It's necessary in these cases to treat the gum disease, primarily by manually removing plaque and calculus (hardened plaque deposits), which causes and sustains the infection. Once removed, the gums can begin to heal and strengthen their attachment. We may also need to apply splinting or perform surgical procedures to encourage gum and bone reattachment.
Whatever has caused your loose tooth, our goal is to remove the cause or lessen its effects. With your tooth secure and the gums regaining their healthy attachment, we have a good chance of saving it.
If you would like more information on teeth grinding and other potentially damaging oral habits, 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 “Loose Teeth: Biting Forces can Loosen Teeth.”
Getting a new smile doesn’t have to be an elaborate affair. If your teeth have minor to moderate chips, stains or tooth gaps, dental veneers could be the answer. These thin wafers of dental porcelain mask tooth imperfections and completely change your smile’s dynamic—and without a huge impact to your wallet.
To achieve that effect, though, your personal set of veneers will require the expertise of both your dentist and a dental lab technician to design and create your veneers. And while there are numerous considerations in achieving a truly life-like appearance with veneers, one of the most important is their color.
We always associate the color white with teeth. And while it is the dominant hue, actual tooth color is more complex. An individual tooth is comprised of multiple shades and tints, that range in variation from its biting edge to the gums. Likewise, tooth color in general can differ from person to person.
Your dentist must take these individual color variations into account while designing your new veneers, especially if you’ll be getting them for some but not for all your teeth. In that case, it’s important for the veneer color to blend seamlessly with the color of your natural teeth without veneers.
Your new smile expectations and desires are also important and should be considered when designing veneer coloring. For instance, do you want a more natural look—or would you prefer a smile with more “dazzle”? This could have an impact on color.
Your dentist takes all of this information (including your input) and communicates it clearly to the dental lab technician creating the veneers. That process is a combination of both science and artistry, using a variety of techniques to achieve an accurate, life-like texture and color result. For example, a technician may paint the edges of the veneers with a ceramic paste that when cured produces a life-like translucency.
This meticulous attention to color detail is necessary to create beautiful veneers that look natural. If the color is right, you’re sure to enjoy the change your veneers bring to your smile for many years to come.
If you would like more information on transforming your smile with dental veneers, 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 “Porcelain Veneers: Your Smile—Better Than Ever.”