Posts for tag: crowns
If you've decided on a dental implant to replace a missing tooth, you've made a great choice. Implants are a big favorite of both dentists and patients, not only for their life-likeness, but also their durability. Studies show that more than 95% of implants survive after ten years.
As you may know, single tooth implants are composed of two main parts: a metal post (usually titanium) imbedded in the jawbone; and a life-like crown affixed to the end of the post. But what you may not know is that there are two ways to attach the crown—either with screws or with dental cement.
Neither way is superior to the other—both have their own set of advantages and disadvantages. A cemented crown, for instance, usually looks more like a natural tooth than a screw-retained crown (more about that later) and dentists have more flexibility in making them look natural.
But cemented crowns require an additional piece of hardware called an abutment to better match it with the implant, something unnecessary with a screw-retained crown. Some people can also experience a reaction to the cement resulting in inflammation or even bone loss. And once installed, removing the crown later for repair or replacement is much more difficult than with a screw-retained crown.
Besides attaching directly to the implant, screw-retained crowns don't require cement and are more easily attached and removed. But the screw-hole can pose some aesthetic problems: Although it can be filled with a tooth-colored filling, the tooth's appearance isn't as ideal as a cemented crown.
So, which one is best for you? That will depend on the type and location of teeth being replaced, as well as your dentist's preferences. For instance, a more attractive cemented crown may be better for a visible front tooth, while a screw-retained crown might be a good choice for a back premolar or molar where appearance isn't as big a factor.
In the end, it's likely your dentist will discuss the pros and cons for each method as it pertains to your individual case. Whichever way your crown attaches, the end result will still be a life-like tooth that could last you for years to come.
If you would like more information on 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 “How Crowns Attach to Implants.”
Repairing a decayed tooth may be as simple as removing the damaged tooth material and filling the void. Many filling materials can now match the color of a tooth, so the dental work is hardly noticeable.
Sometimes, though, the decay is too extensive or we've treated the tooth several times and it won't support another filling. If the tooth is still viable, we may be able to cover it with a custom crown.
Also known as a cap, a crown fits over and is securely affixed to the tooth with bonding material or cement. Crowns have been used for decades to restore teeth, but the materials they're made of have changed with time.
The original crowns were made of metal, usually gold or silver. They were strong and could hold up well to the daily forces produced by chewing or biting. They did, however, visually stand out and came to be regarded as unattractive. There were porcelain materials available that could closely mimic the life-likeness of teeth, but they could be weak and brittle.
Dentists came up with a hybrid crown that could supply strength as well as an attractive appearance. These were composed of two parts: an inner metal frame for strength overlaid with porcelain for appearance. These fused crowns were the most popular until the mid-2000s.
About that time, newer forms of porcelain came on the market that were not only attractive, but also durable. Although caution should still be taken when biting something hard, they've proven to stand up well to biting forces. Fused porcelain to metal is still in use, but usually for back teeth where biting forces are higher and the crown won't be as noticeable as on front teeth.
Crowns can also address cosmetic issues with chipped, fractured or excessively worn teeth. But with any crown you should be aware that much of the original tooth material must be removed to accommodate the fit. The altered tooth will require a crown or other restoration from then on. Crowns must also be custom-made by a dental technician in a process that can take weeks.
Still, the process can be well worth it. With proper care and maintenance, a crown could serve you and your smile well for many years to come.
If you would like more information on crowns and other restoration options, 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 “Crowns & Bridgework.”
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.
While dental implants have become the most popular restoration among both dentists and patients, it’s primarily a tooth replacement — either for a missing tooth or a tooth beyond repair that must be extracted. But what if your tooth is still viable beneath its unattractive exterior? From an oral health standpoint, it’s usually wise to preserve it.
Even so, you still have options for making a tooth that’s spoiling your smile more attractive. One of the most effective solutions happens to be one of the oldest in dentistry: a crown. In effect, a crown is a life-like replica made of metal or dental porcelain that’s bonded over a tooth. And with today’s advanced materials and methods a crown can not only enhance the appearance of the tooth it covers, it can also be made to blend with the color and symmetry of adjacent teeth.
Here are a few dental situations where a crown could provide both protection for a tooth and a more attractive appearance.
Chipped, Damaged or Abnormally Developed Teeth. Teeth often take the brunt of mouth injuries, resulting in chips or even fractures. Also, teeth sometimes don’t erupt fully or develop a normal shape. A crown can effectively cover these missing or abnormal parts of a tooth and restore a more natural appearance.
Following Root Canal Treatment. Trauma or deep decay can damage the interior of a tooth - the pulp and root canals - and endanger its survival. A root canal treatment cleans out and repairs these areas, filling them with a special filling to prevent further infection. A crown is usually necessary to both protect the tooth and restore its appearance.
Discoloration. There’s a difference between outward staining of the enamel, which can usually be brightened with whitening solutions, and staining deep within the tooth from various causes. While there are techniques to bleach “intrinsic” staining, a crown provides another option for covering a heavily discolored tooth for a more attractive appearance.
Excessive Wear. We all experience some teeth wearing as we age; but grinding or clenching habits can accelerate that wear and shorten teeth, resulting in a prematurely aged look. Crowns restore worn teeth to a more normal length that can take “years” off your smile.
If you would like more information on crown 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 “Crowns & Bridgework.”
Crowns are a mainstay of cosmetic dentistry used to improve your smile’s appearance in a variety of situations. Not all crowns are alike, though — and the differences could affect your cost.
Crowns or caps are needed to cover remaining tooth structure which was previously damaged. Tooth decay and trauma are the major reasons for damage or loss of tooth structure that make crowns necessary. After preparing the remaining healthy tooth to fit into the new crown, we then make an impression mold of the tooth for a dental technician to use to create the new crown. It’s at this point where the road to your new smile can take different paths, both in construction and how much artistry goes in to your crown’s formation.
Porcelain crown construction falls into two general categories. The first category involves life-like porcelain fused to an inner core of metal. Because many older types of porcelain tend to be brittle and subject to breaking under pressure, metals are used to strengthen the crown. A fused crown can thus provide both durability and a life-like appearance.
In recent years, though, new dental materials have made the second category — all porcelain crowns — a viable option. Either lithium disilicate or zirconium oxide account for nearly two-thirds of crowns made today. Although research on their durability is relatively new, initial results have been encouraging, showing advanced all-ceramic crowns can tolerate forces comparable to porcelain fused to metal (PFM) crowns used in bridges.
On the downside, these newer materials may be more expensive than PFM crowns. Costs for manufacturing may also increase depending on how life-like the matching of color with other teeth you desire your crown to be. For example, individual teeth aren’t a uniform color — there are gradations of color that can vary from the tip of the tooth to the root. To capture these gradations in an individual crown requires a high level of artistry and time by the dental technician, which increases the final cost.
If you’re in need of a crown, it’s best to first make an appointment for a consultation to review your options, and to consider both your expectations and financial ability. Together we can determine what it will take to create a new look for your teeth that fits your expectations and your budget.