Crowns & Bridgework

This section is dedicated to the latest information on oral health topics, culled from authoritative sources such as the American Dental Association.

Click here for the latest news from the American Dental Association.


Heart Disease

Poor dental hygiene can cause a host of problems outside your mouth-including your heart. Medical research has uncovered a definitive link between heart disease and certain kinds of oral infections such as periodontal disease. Some have even suggested that gum disease may be as dangerous as or more dangerous than other factors such as tobacco use. A condition called chronic periodontitis, or persistent gum disease, has been linked to cardiovascular problems by medical researchers.

In short, infections and harmful bacteria in your mouth can spread through the bloodstream to your liver, which produces harmful proteins that can lead to systemic cardiac problems. That's why it is critical to practice good oral hygiene to keep infections at bay-this includes a daily regimen of brushing, flossing and rinsing.


Antibiotic Prophylaxis

In some cases, patients with compromised immune systems or who fear an infection from a dental procedure may take antibiotics before visiting the dentist.

It is possible for bacteria from your mouth to enter your bloodstream during a dental procedure in which tissues are cut or bleeding occurs. A healthy immune system will normally fight such bacteria before they result in an infection. However, certain cardiovascular conditions in patients with weakened hearts could be at risk for an infection or heart muscle inflammation (bacterial endocarditis) resulting from a dental procedure.

Patients with heart conditions (including weakened heart valves) are strongly advised to inform our office before undergoing any dental procedure. The proper antibiotic will prevent any unnecessary complications.


Dentistry Health Care That Works: Tobacco

The American Dental Association has long been a leader in the battle against tobacco-related disease, working to educate the public about the dangers inherent in tobacco use and encouraging dentists to help their patients break the cycle of addiction. The Association has continually strengthened and updated its tobacco policies as new scientific information has become available.

Smoking and Implants

Recent studies have shown that there is a direct link between oral tissue and bones loss and smoking. Tooth loss and edentulism are more common in smokers than in non-smokers. In addition, people who smoke are more likely to develop severe periodontal disease.

The formation of deep mucosal pockets with inflammation of the peri-implant mucosa around dental implants is called peri-implantitis. Smokers treated with dental implants have a greater risk of developing peri-implantitis. This condition can lead to increased resorption of peri-implant bone. If left untreated, peri-implantitis can lead to implant failure. In a recent international study, smokers showed a higher score in bleeding index with greater peri-implant pocket depth and radiographically discernible bone resorption around the implant, particularly in the maxilla.

Many studies have shown that smoking can lead to higher rates of dental implant failure. In general, smoking cessation usually leads to improved periodontal health and a patient’s chance for successful implant acceptance.


External Links

Dental Crowns and Bridgework.Dentistry is an art as well as a science; dental crowns offer a perfect example of this. A dental crown or “cap” is a covering that fits over a damaged, decayed or unattractive tooth. It can even replace a tooth entirely as part of dental bridgework.

A crown completely covers a tooth above the gum line. This is in contrast to a dental veneer, which only covers a tooth's front surface and needs natural tooth structure to support it. Therefore, if a tooth is missing a significant amount of structure above the gum line, a crown would be the restoration of choice.

Crowns strengthen damaged teeth, allowing them to function normally again. When crafted from today's high-tech porcelains (dental ceramics), crowns are virtually indistinguishable from natural teeth. They can even be designed to improve upon a tooth's original appearance.

There are other materials besides porcelain that we can use to make dental crowns, depending on what qualities are most important. For durability, cast gold can't be beat. However, this is not always the most aesthetic choice — especially towards the front of the mouth. Other possibilities include porcelain-fused-to-metal crowns (PFM), which have a metal interior for strength and a porcelain exterior for a more natural appearance, and all-porcelain crowns with zirconia, representing the strongest ceramic. We would be happy to discuss the pros and cons of these various options with you.

Crowning or Capping a Tooth

Dental Crowns - Step by Step.Crowning or capping a tooth will usually take two to three visits. At the first visit, your tooth is prepared to receive its new crown. First, it is shaped to fit inside the new covering. This will involve some drilling to give the tooth a uniform shape. The tooth and the surrounding area will be numbed beforehand. If there is very little tooth structure left to begin with, the tooth may have to be built up with filling material, rather than filed down, to support the crown.

After the tooth is prepared, impressions of your teeth are taken, either digitally or with reliable, putty-like impression materials, and sent to the dental laboratory. There, the impressions will be used to make models of your teeth for the creation of a crown. The models will serve as guides to the highly skilled lab technicians, who will ensure that your new crown is designed to enhance your smile and function well within your bite.

Before you leave the office, a temporary crown will be attached to your tooth to protect it until the permanent crown is ready. At the second visit, your permanent crown will be attached to your tooth with either a resin that hardens when exposed to a special light source, or a type of permanent cement.

Creating a Bridge

Dental Bridgework - Step by Step.Crowns can also be used to create a lifelike replacement for a missing tooth. This is done with bridgework, which spans the space of the missing tooth and requires at least three crowns. Two of those crowns will be placed over healthy teeth on either side of the missing tooth; these healthy teeth are referred to as abutment teeth. The two crowned abutment teeth become supports for a third crown placed in between them; that third crown is referred to as a pontic. If more than one tooth is missing, more crowns will be needed to bridge the gap in between the abutment teeth.

The number of abutment teeth necessary to replace missing teeth is influenced by the number of missing teeth, the size and length of the abutment tooth roots, the amount of bone support each abutment tooth has, as well as where in the mouth the missing tooth is located. For example, if you have three missing teeth, four abutment teeth may be necessary, thereby creating a seven-tooth bridge. Engineering and designing of the bridge requires an understanding of how to replace teeth, as well as the biology of the supporting gum and bone tissue.

Caring for Your Crowns & Bridgework

Crowns and bridgework require the same conscientious care as your natural teeth. Be sure to brush and floss between all of your teeth — restored and natural — every day to reduce the buildup of dental plaque. When you have crowns, it is even more important to maintain your regular schedule of cleanings at the dental office. Avoid using your teeth as tools (to open packages, for example). If you have a grinding habit, wearing a nightguard would be a good idea to protect your teeth and your investment.

Related Articles

Crowns and Veneers - Dear Doctor Magazine

Porcelain Crowns & Veneers Dear Doctor magazine examines two innovative strategies for improving your smile. In many instances, these two restorative techniques can produce nearly identical aesthetic results, even though they are designed differently for handling different structural problems... Read Article

Crowns - Dear Doctor Magazine

Value Of Quality Care Are all crowns created equal? And why are some crowns more expensive than others? Crown fabrication costs depend upon the materials used and the time needed to create them, among other factors. Dear Doctor magazine examines these variables... Read Article

Bridgework - Dear Doctor Magazine

Fixed vs. Removable Bridgework For those patients who have lost all their teeth, but have not lost significant bone, a fixed bridge (permanent non-removable teeth) may be the treatment of choice. For those who have severe bone loss, an implant-supported overdenture offers significant advantages... Read Article