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Posts for tag: crowns

By Scott A. Allegretti, DDS Provincetown Dental Arts
October 10, 2021
Category: Dental Procedures
Tags: crowns  
WhatYouNeedToKnowToChoosetheRightDentalCrown

In the realm of dental restorations, not all crowns are alike. And, one type isn't necessarily superior to the others. One type of crown may work better for a particular tooth, while a different crown is better suited to another.

Therefore, knowing your options can help you make a more informed choice with your dentist regarding the best crown for your needs. Here, then, is a quick primer on the main types of dental crowns used today.

Metal crowns. Early in the last century, crowns made of gold, silver or other metals were the go-to dental restoration. Because of their strength and durability, metal crowns are still used today, mainly in back teeth that encounter heavy biting forces. Their drawback: They're decidedly not the color of natural teeth and so can stand out if they're placed in the visible "smile zone."

PFM crowns. The first crowns made with dental porcelain solved the appearance problem, but couldn't adequately handle biting forces as well as metal. Out of this came the porcelain fused to metal (PFM) crown, which contains an inner core of metal overlaid with tooth-colored porcelain. Providing both strength and life-likeness, PFM crowns were immensely popular until the mid-2000s.

All-Ceramic crowns. The development of porcelains more durable than earlier versions eventually dethroned the PFM (although the latter is still used today). Sixty percent of the crowns installed in recent years are all-ceramic, many reinforced with a strength material known as Lucite. Many all-ceramic crowns reaching the 15-year mark are still in place and functioning.

All of these crowns continue to be viable options for dental patients. The biggest factor in choosing one particular crown over another is the type of tooth involved and its location. As mentioned before, metal or PFM crowns are usually better for back teeth where durability is a higher priority than aesthetics. All-ceramics work well in high-visibility front teeth that normally encounter lighter biting forces than back teeth.

Regardless of which kind eventually caps your tooth, any of today's modern crowns will function as intended. But the best crown for you will be the one that both protects your tooth and enhances your smile.

If you would like more information on dental 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 “Porcelain Dental Crowns.”

By Scott A. Allegretti, DDS Provincetown Dental Arts
August 11, 2021
Category: Dental Procedures
Tags: dental implants   crowns  
WhichImplantCrownAttachmentMethodisBestforYou

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.”

By Scott A. Allegretti, DDS Provincetown Dental Arts
August 01, 2021
Category: Dental Procedures
Tags: celebrity smiles   crowns  
HowCelineDionOvercameHerSmileObstacle

For over three decades, Celine Dion has amazed audiences and fans with her powerful singing voice. Best known for her recording of "My Heart Will Go On," the theme song for the movie Titanic, Dion has amassed global record sales topping 200 million. In her early singing days, though, she struggled with one particular career obstacle: an unattractive smile.

The Canadian-born performer had a number of dental defects including crooked and discolored teeth, and—most prominent of all—abnormally large cuspid or "canine" teeth (located on either side of the four front incisors). They were so noticeable that one Quebec celebrity magazine gave her the unflattering nickname "Canine Dion."

This isn't an unusual problem. Since human canines are already the longest teeth in the mouth, it doesn't take much for them to stand out. Our ancient hunter-gatherer ancestors needed these large, pointed teeth to survive. But with the evolution of agriculture and industry, canine teeth have become gradually smaller—so much so that when they're abnormally large, they don't look right in a smile.

So, what can be done if your canines embarrassingly stand out from the rest? Here are some of the options to consider.

Reduce their size. If your canines are just a tad too long, it may be possible to remove some of the enamel layer in a procedure called contouring. Using this technique, we can reduce a tooth's overall size, which we then re-shape by bonding composite resin to the tooth. It's only a good option, though, if your canines have an ample and healthy layer of enamel.

Repair other teeth. The problem of prominent canine teeth may actually be caused by neighboring teeth. When the teeth next to the canines are crooked, the canines can appear more prominent. Alternatively, other teeth around the canines may be abnormally small. Braces or clear aligners can correct crooked incisors, and applying porcelain veneers to smaller teeth could help normalize their length.

Apply dental crowns. In some instances, we can reduce the canines in size and then bond porcelain crowns to them. This is the option that Dion ultimately chose. The natural teeth are still intact, but the crowning process transforms them into properly proportioned, life-like teeth. There is, however, one caveat: The alteration to these teeth will be permanent, so they will need a crown from then on.

Besides crowning her canine teeth, Dion also underwent other dental work to straighten and whiten her other teeth. As a result, this superstar performer now has a superstar smile to match and so can you if your teeth are less than perfect. These or other cosmetic enhancements can give you the look you truly desire. All it takes is an initial visit with us to start you on the road to a transformed smile.

If you would like more information about various cosmetic solutions for your smile, please contact us or schedule a consultation. To learn more, read the Dear Doctor magazine article “Porcelain Dental Crowns.”

By Scott A. Allegretti, DDS Provincetown Dental Arts
May 13, 2021
Category: Dental Procedures
Tags: celebrity smiles   crowns   veneers  
HowGeorgeClooneyMadeOverHisSmileandHowYouCanToo

Since his breakout role as Dr. Doug Ross in the 90's TV drama ER, George Clooney has enjoyed a blockbuster career as an award-winning actor, director and producer. He's still going strong, as seen in the recent film The Midnight Sky, which Clooney directed and starred in. This sci-fi drama set a record as the most-watched movie on Netflix for the first five days after its late December release. And although now well into middle age, Clooney still possesses a winsome charm epitomized by his devil-may-care smile.

But he didn't always have his enigmatic grin. Early on, his struggles pursuing his burgeoning acting career triggered a stressful habit of grinding his teeth. This took a toll, as his teeth began to look worn and yellowed, giving his smile—and him—a prematurely aged appearance.

Clooney's not alone. For many of us, our fast-paced lives have created undue stress that we struggle to manage. This pent-up stress has to go somewhere, and for a number of individuals it's expressed through involuntary grinding or gritting of the teeth. This may not only lead to serious dental problems, but it can also diminish an otherwise attractive smile.

There are ways to minimize teeth grinding, the most important of which is to address the underlying stress fueling the habit. It's possible to get a handle on stress through professional counseling, biofeedback therapy, meditation or other relaxation techniques. You can also reduce the habit's effects with a custom-made oral device that prevents the teeth from making solid contact during a grinding episode.

But what if teeth grinding has already taken a toll on your teeth making them look worn down? Do what Clooney did—put a new “face” on your teeth with dental veneers. These thin layers of porcelain are bonded to teeth to mask all sorts of blemishes, including chips, heavy staining and, yes, teeth that appear shortened due to accelerated wearing. And they're custom-designed and fashioned to blend seamlessly with other teeth to transform your smile. Although they're not indestructible, they're quite durable and can last for years.

Veneers can correct many mild to moderate dental defects, but if your teeth are in worse shape, porcelain crowns may be the answer. A crown, which bonds to a prepared tooth to completely cover it, allows you the advantage of keeping your natural tooth while still enhancing its appearance.

Although different in degree, both veneers and crowns require permanently altering the teeth, such that they will require a dental restoration from then on. But if you're looking for an effective way to transform your worn or otherwise distressed teeth into a beautiful smile, it's a sound investment.

Just like George Clooney, your smile is an important part of who you are. We can help you make it as appealing as possible with veneers or other dental enhancements. Call us today to get started on the path to a more attractive smile.

If you would like more information about dental veneers and other smile enhancements, please contact us or schedule a consultation. To learn more, read the Dear Doctor magazine article “Porcelain Veneers.”

By Scott A. Allegretti, DDS Provincetown Dental Arts
February 03, 2019
Category: Dental Procedures
Tags: crowns  
CrownscannowbemadeIn-OfficewiththeCADCAMSystem

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.”