The most conservative approach when attempting to replace a missing tooth is a bonded bridge or often referred to as a Marilyn Bridge. An impression of the area is taken and a new tooth referred to as a pontic is formed. Attached to the pontic on either side are abutments or â€œwingsâ€ that will support the pontic. The most common type of Marilyn Bridge uses abutments that are cemented on the backside of the adjoining teeth and hold the pontic in place where the missing tooth used to be. The adjacent teeth may need to be slightly modified to accept the â€œwingsâ€ of the pontic. The advantage of this type of procedure is that you are not having to put full coverage crowns on the adjoining teeth.
If your smile is in need of a makeover, crowns can provide predictable results. Crowns can give an unattractive tooth back its beautiful shape and color. For smaller or worn down teeth, a crown can restore the natural size of the old tooth. A crown can replace either part of or the tooth's entire structure. For procedures requiring only the areas visible from the outside, a veneer may be an alternative option.
A crown is sometimes termed a "cap" or "jacket." A crown will restore a large filling or a cracked tooth to its original size, shape and tooth color. A crown may be recommended after root canal therapy has been completed, as the tooth tends to become brittle and is more likely to fracture. A crown can strengthen and protect the remaining tooth structure and improves the appearance of your teeth. With the advances in technology, we now have the ability to make ceramic crowns with no metal.
To place a crown, your dentist must reduce 1-2 mm of the tooth to make room for it. Your dentist will then use a piece of thread or cord or use a laser to push the gum down around the tooth, to take an impression of the tooth. The impressions are sent to the lab where the crown is made. During that time, you will have a temporary crown. These crowns are usually made of plastic and are made in your dentist's office on the day of your visit. They are not meant to last. If a temporary crown is left in the mouth, the cement eventually washes out and the tooth can decay. At a second visit, your dentist will remove the temporary crown and test the permanent one. Sometimes crowns need additional polishing, glaze or some other adjustment before they are placed. Once the crown is ready, it's cemented to your tooth.
A bridge may be used to replace a single tooth. A bridge consists of both a false tooth, called a pontic and the anchors (abutment crowns) that support the pontic. The entire structure spans the space vacated by the missing tooth.
Neighboring tooth structure is removed shaping them to receive an anchor crown. An impression is then taken and sent to a dental lab where they fabricate the bridge.
The structure part of the bridge is created with a strong metal alloy that can handle the anticipated stresses.
Tooth-like porcelain is then fused to the structure. Once the bridge is tested for a correct fit, the anchor crowns are cemented to the neighboring teeth.
These are very esthetic, bonded crowns. They are mostly used for front teeth because they are the most natural looking type of crown and are often used in 'cosmetic' dentistry. There are many types, but they all have a common feature - no metal. They can occasionally break, but dental technology has advanced far enough to make them quite strong.
The 'gold' standard. Dental gold is about 60% gold alloy which is meant to match the hardness of the enamel of opposing teeth so both wear about evenly, an important trait.Gold does not tarnish or corrode and has some bacterial inhibiting quality. Gold crowns are strong and will not break. However, gold crowns obviously are not considered esthetic; they are gold colored. So usually gold crowns are used for lower back molars because they don't show there.
An inlay or onlay is a method of repairing a tooth that is somewhere between a filling and a crown. They are used when the tooth is unable to support a filling, but is not damaged to the point that it needs a crown. An inlay is much like a filling but is inserted into the ridges (cusps) of the chewing surface. An onlay is a little more extensive than an inlay and covers multiple cusps of the tooth. Inlays and onlays are commonly made with ceramic or composite materials but can also be made of gold. They are very durable and can last a long time depending on the material used and how well the patient takes care of them with regular brushing, flossing and visits to the dentist.
The most common type of crown and has a proven track record. PFM crowns are fairly aesthetic and they look like real teeth. However, the margins or borders may appear dark because PFM crowns have a metal substructure with layers of porcelain fired over the substructure. Porcelain is very hard, much harder than natural enamel and may cause excessive wear of the enamel of opposing teeth. Porcelain may break with extreme biting forces.
There is now new technology that allows you to replace old silver and gold fillings with a more natural looking, composite filling. Composite fillings are bonded to the tooth and research has proven them to be about 90% as strong and healthy as natural tooth material.
- Beautiful in appearance
- Completed in a single visit
- No filling leaks
- Less chance of tooth cracking
Stainless steel crowns, also known as 'silver crowns or caps', are a very common procedure used to restore 'baby teeth' (and occasionally permanent teeth) that have large caries or those that had a pulpotomy (baby root canal). Although most teeth can be filled with a white or silver filling material, stainless steel crowns are by far the most predictable and durable option to fix 'baby teeth' with large caries, large defects, or damaged enamel. This is particularly true in very young children that have caries at a young age, since it is preferred that the 'fixed' teeth last as long as possible.
In order to make a filling appear almost invisible to the naked eye, composite fillings are often used. These fillings are designed to match your natural tooth color and are bonded to your teeth, which makes them less likely to fall out. These fillings are used to replace older fillings made of silver or gold. Tooth colored fillings have a more aesthetic appearance, can be completed in one visit, form a strong seal and are less likely to crack a tooth.
With todayâ€™s advances in dentistry, there are several options when choosing a type of crown. The most common crown utilized in dentistry is referred to as a PFM or porcelain-fused to metal crown. For those that have sensitivities to metals or are worried about aesthetics, there are all porcelain crowns or crowns that are composed of a material called composite. There have been several advances in all porcelain crowns and some labs are now utilizing zirconia which is much stronger than a typical porcelain crown. Also, they still are making all metal crowns, which are typically gold, and are usually used on a molar or a back tooth. Of course all of these different options vary in durability, appearance and cost. Please contact our office for any further questions. We would be more than happy to find the crown that is right for you and your situation.
When a cavity needs to be filled, there are four choices in the filling material:
The most common is a composite filling, this is a natural tooth colored filling and bonds to the tooth for extra strength. There are also gold and silver fillings. Silver fillings are inexpensive and strong while gold fillings may look nicer and provide a better fit. The final option is a porcelain filling, also called an inlay, which is the most durable of fillings and is also the color of your natural teeth.
Ask Dr. Sulak, a cosmetic and restorative dentist in Modesto, which filling would be best for you.