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Orthodontist

Crowns

Crowns: 
If you want a smile that’s your crowning glory, you may need a crown to cover a tooth to help restore it to its normal shape and size. A crown can make your tooth stronger and improve its appearance.
A crown can help strengthen a tooth with a large filling when there isn’t enough tooth remaining to hold the filling. Crowns can also be used to attach bridges, protect a weak tooth from breaking or restore one that’s already broken. A crown is a good way to cover teeth that are discolored or badly shaped. It’s also used to cover a dental implant.
If your dentist recommends a crown, it is probably to correct one of these conditions. Your dentist’s primary concern, like yours, is helping you keep your teeth healthy and your smile bright.

Types of Dental Crowns:

There are four different types of dental crowns.
Ceramic : These are used for restoring front teeth, and are popular in this area for their ability to blend with your natural tooth color. The crown is made of a porcelain-based material.
Porcelain-fused to metal : This crown provides a stronger bond than regular porcelain because it is connected to a metal structure. It's also extremely durable.
Gold alloys : This crown is a mix of gold, copper and other metals. In addition to providing a strong bond to the tooth, it doesn't fracture, nor does it wear away the tooth itself.
Base metal alloys :This crown is made up of non-noble metals that are highly resistant to corrosion, and make for a very strong crown. It also requires the least amount of healthy tooth to be removed prior to fitting.

Crown Types:
Your dentist is key to sustaining good oral hygiene so that you won't have to choose from these different types of dental The sealing ability of the all-porcelain crown depends on the filling materials and the quality of the underlying tooth, according to the American Dental Association (ADA), whereas the other three provide particularly good seals against leakage.
Durability is best in the gold and metal alloys crowns, whereas the all-porcelain crown tends to be less strong, more suseptibleif it is put under enough pressure (if you grind your teeth at night, this may pose a problem). By contrast, the crown of porcelain fused to metal offers better durability. Both porcelain-based crowns are highly resistant to wear, but they can quickly aggravate opposing teeth if the adjacent surface becomes rough. Incidentally, the gold and metal alloys are resistant to wear and gentle on opposing teeth at the same time.
Though they sometimes become loose or fall out, crowns can last a lifetime if properly maintained. The best way to achieve this is through proper oral health. Brushing and flossing twice a day are your go-to methods of keeping your teeth healthy every morning and night. Use a toothbrush such as the to keep your teeth spotless, especially your back molars. Above all, scheduling regular checkups withcrowns.

What is crown?
A crown (“cap”) is a toothshaped dental restoration that is used for capping or completely encasing a single damaged tooth or dental implant. Also called “dental caps” and “porcelain jackets”, they can be made from a variety of materials and are permanently bonded to their foundation with dental cement, avoiding the need for tooth extraction, bridges, partials or dentures. They cannot be used for full-mouth restoration.

Why are Teeth Capped?
They are commonly used to:
Protect a tooth that is weak from wear and tear and/or decay from further damage
Hold a fractured or broken tooth together
Cover a large filling that involves half of the tooth or more
Support a dental bridge
Restore a tooth after a root canal procedure to prevent fracturing
Hide severely discolored or misshapen teeth when veneers cannot
Cap off and complete a dental implant procedure
Relieve the pain experienced as a result of cracked tooth syndrome

Types and Benefits:
The types available are differentiated by the materials used to make them, each with its own purposes and benefits.
Stainless Steel:
This type of crown is generally used as a temporary solution, most often in pediatric dentistry. Because primary teeth (baby teeth) are necessary for the positioning of permanent teeth, stainless steel ones are used to protect them from further decay until they fall out naturally.
Metal:
Commonly a gold alloy, palladium, or other base-metal alloy such as chromium or nickel, metal crowns are typically used for back molars as individuals want their metallic color to be out-of-sight. They have thinner walls, so they requireless tooth reshaping and removal prior to fitting. They stand up better to chewing, rarely chip, last the longest and cause very little damage to opposing teeth.
Porcelain Fused to Metal:

Consisting of a metal shell with a heat-fused porcelain exterior, these crowns are used for both front and back teeth since they can be color-matched and appear more natural. They are more susceptible to chipping and can cause stress or damage to opposing teeth. Sometimes the metal underneath the porcelain can be seen as a dark line near the bottom edge of the crown. If the gum recedes, it can become even more noticeable at the gum line.
All-Ceramic:
Made from a number of natural materials including types of feldspar and zirconia, all-ceramic crowns look the most lifelike as they provide a closer color match. They are also biocompatible, making them an option for those who are allergic to metal. Similar to porcelain, they are less durable and can crack or chip.
All-Resin:
These are made from composite resin, most commonly acrylic polymers mixed with silicon dioxide. They are the most affordable option. The acrylics used can be color-matched to natural teeth, but they are less durable and more susceptible to fractures.
The Procedure:

First Visit – Consultation:
During the first visit, a dentist will examine the tooth and its root to determine whether or not a crown is a suitable method of restoration and if additional procedures will be required to make it a success. For example, a tooth with a compromised root can cause an infection or injure the tooth’s pulp, in which case a root canal might be necessary. The examination may involve analyzing X-rays and impressions of the patient’s bite. Depending on the severity or nature of the situation, the dentist may refer the patient to a specialist such as a periodontist, oral surgeon or orthodontist for further examination. Once it has been decided that capping a tooth is the best option, the dentist will proceed with preparation.

Preparation:
The procedure begins by numbing the tooth with local anesthesia, followed by preparing the tooth so that it can support the crown. This includes reshaping the tooth by either filing down the enamel or applying a filling to build it up if it is too damaged or decayed. The amount removed or added depends on the type that will be used. A dental impression is taken and sent to a lab that uses it to design and manufacture it. An impression of the surrounding teeth is also taken to ensure that it perfectly integrates with your bite. A temporary crown made of acrylic is placed to protect the tooth until you return. It typically takes 2-3 weeks for it to be fabricated.

Temporary Care:
Between visits it is important to take care of the temporary cap in order to protect the prep work performed underneath it. The design of the permanent crown is based on the size, shape and condition of the tooth before the temporary crown is placed, so it is important to take a few precautions. This includes avoiding sticky, chewy or hard foods that may dislodge the temporary crown, pulling floss out rather than up during cleaning to avoid pulling the crown off and chewing on the opposite side of the mouth.
Second Visit:
During the second visit, the dentist will remove the temporary cap and a local anesthetic may or may not be administered. After removal, the dentist will check the fit and color before permanently cementing it in place. This is done with precision, as any gaps between the crown and the tooth can allow bacteria to grow, causing further decay and increasing the likelihood of a fracture.
The process may take more than 2 visits or require longer sessions if your situation requires special procedures such as a root canal, orthodontic treatment or gum treatment.
Recovery and Post-Procedure Care:
After the procedure, patients may experience some sensitivity to hot and cold. This can be alleviated by brushing with toothpaste designed for sensitive teeth. If you experience pain or discomfort when biting down, it may not be aligned properly and another trip to the dentist is necessary. Unfortunately, crowned teeth are not decay-proof. They susceptible to fracture and gum disease just like any other tooth. Proper and consistent dental care is the best way to maintain the crown, including brushing, flossing and a healthy diet. They usually last between 5 and 15 years. The primary factors that affect how long they last are your oral hygiene and any mouth-related habits including clenching/grinding, biting fingernails and chewing ice.
Potential Problems:
After the procedure, a number of problems can occur that require returning to the dentist for repairs or replacement restorations. Crowns can chip, become loose and even fall off. Usually seen in all-porcelain crowns, chipping can be repaired with composite resin. A replacement may be necessary if the damage is extensive. A crown can become loose or detach due to improper placement, a lack of cement or cement washing out from under it. These issues can usually be fixed by re-cementing it in place. If not, a new crown willbe made. If the problem is ignored for too long, the underlying tooth may experience further damage, in which case the procedure must be redone.
They can take some getting used to, but crowns eventually look, feel and function just like normal teeth. If you have any concerns or questions after the procedure, contact your dentist.


 

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