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PFM-ZIRCONIA CROWNS
What Are Dental Crowns?
A dental crown is a tooth-shaped "cap" placed over a tooth to restore its shape, size, strength, and appearance. It covers the entire visible portion of a tooth above the gum line. Crowns are an effective way to protect a weakened tooth, improve its appearance, or hold together parts of a cracked tooth. They are made from a variety of materials and can last many years with proper care. Why Might You Need a Dental Crown?
Several reasons might prompt a dentist to recommend a dental crown:
1. Protection for a Weak Tooth: Teeth that are weakened by decay or those that have been fractured can benefit from the protection offered by crowns. They help hold the tooth together and prevent further damage.
2. Restoring a Broken or Worn Down Tooth: Teeth that are significantly worn down from grinding or those that have been broken can be restored to their normal shape and function with a crown.
3. Supporting a Tooth with a Large Filling: If a tooth has a large cavity filling that takes up more than half of the tooth’s width, a crown can support and cover the filling and the remaining tooth structure.
4. Holding a Dental Bridge in Place: Crowns are used to hold dental bridges in place. A bridge is used to replace one or more missing teeth by spanning the gap where teeth are absent.
5. Covering Misshaped or Discolored Teeth: Crowns can improve the appearance of teeth that are severely discolored or misshaped.
6. Covering a Dental Implant: Implants, which replace missing teeth, are topped with crowns to make them functional and aesthetically pleasing.
7. Cosmetic Modification: Crowns can be used to improve the appearance of a tooth.
Types of Dental Crowns There are several types of dental crowns, each made from different materials:
1. Metal Crowns: These crowns are made from alloys that contain a high content of metals like gold or platinum. Metal crowns are very durable and rarely chip or break. They withstand biting and chewing well and are ideal for molars that are out of sight.
2. Porcelain-Fused-to-Metal (PFM) Crowns: These crowns have a metal base with a porcelain exterior to match the color of natural teeth. They offer a good balance between strength and aesthetics but may reveal a metal line at the gum if gums recede over time.
3. All-Ceramic or All-Porcelain Crowns: Made entirely of porcelain or ceramic materials, these crowns provide the best natural color match. They are a good choice for front teeth and for people with metal allergies.
4. All-Resin Crowns: These are made from dental composite resin. While they are less expensive than other types of crowns, they wear down over time and are more prone to fractures.
5. Pressed Ceramic Crowns: These have a hard inner core and are capped with porcelain, providing excellent color match and durability.
The Dental Crown Procedure Getting a dental crown usually involves two visits to the dentist.
1. First Visit: Preparation and Impressions
- Examination: The dentist will examine the tooth and take X-rays to check the roots and surrounding bone.
- Tooth Preparation: The tooth receiving the crown is reshaped to accommodate the crown. The amount removed depends on the type of crown used.
- Impression: An impression of the trimmed tooth and surrounding teeth is made to create a precise mold for the crown.
- Temporary Crown: A temporary crown is placed over the prepared tooth to protect it while the permanent crown is being made.
2. Second Visit: Placement of the Permanent Crown
- Removing the Temporary Crown: The temporary crown is removed, and the fit and color of the permanent crown are checked.
- Cementing the Crown: Once everything is satisfactory, the permanent crown is cemented onto the tooth.
Caring for Your Dental Crown Crowns do not require special care beyond regular oral hygiene. However, maintaining a good oral hygiene routine is crucial to avoid gum disease and decay at the crown's base. Here are some tips:
- Brush and Floss Daily: Brushing twice a day and flossing once a day help prevent plaque buildup around the crown.
- Use an Antibacterial Mouthwash: This can help control bacteria and reduce the risk of tooth decay and gum disease.
- Avoid Hard Foods: Avoid chewing hard foods, ice, or other objects to prevent damaging the crown.
- Regular Dental Check-Ups: Regular visits to the dentist can help detect potential issues early and maintain oral health.
Longevity of Dental Crowns The lifespan of a dental crown varies based on the material used, the care taken, and the location in the mouth. Generally, crowns can last between 5 to 15 years. Metal crowns tend to last the longest due to their durability, while all-resin crowns might need to be replaced sooner due to wear and tear.
Potential Issues with Dental Crowns Despite their durability, dental crowns can face several issues:
- Sensitivity: Newly crowned teeth may be sensitive immediately after the procedure as the anesthesia wears off. If the crowned tooth has a nerve, you may experience some heat and cold sensitivity.
- Chipped Crown: Crowns made of porcelain can sometimes chip. Minor chips can be repaired, but a replacement might be needed for larger cracks.
- Loose Crown: If the cement under the crown washes out, the crown may become loose. This can allow bacteria to leak in and cause decay.
- Crown Falls Off: Crowns can sometimes come off due to loosening of the cement or an improper fit. If this happens, it is essential to see the dentist as soon as possible.
- Allergic Reaction: Although rare, people may have an allergic reaction to the metals used in some crowns.
- Dark Line on Crowned Tooth: You might see a dark line next to the gum line of your crowned tooth if you have a porcelain-fused-to-metal crown. This is normal, particularly if you have a thin gum line and the metal shows through.
Cost of Dental Crowns The cost of a dental crown can vary widely based on several factors:
- Material: Metal crowns are generally more expensive than other types due to the cost of metals. All-resin crowns are typically the least expensive.
- Location: The cost may vary depending on the dentist's location and the complexity of the procedure.
- Dental Insurance: Many dental insurance plans cover a portion of the cost of crowns, especially if they are needed for medical reasons. It's essential to discuss the costs and options with your dentist, who can provide a detailed estimate based on your specific needs and circumstances.
Dental crowns are a versatile solution for a range of dental issues, from restoring damaged teeth to improving cosmetic appearance. Understanding the types of crowns available, the procedure involved, and the care required can help patients make informed decisions about their oral health. Regular dental visits and good oral hygiene practices are crucial in ensuring the longevity and success of dental crowns. If you think you might need a crown or have questions about dental procedures, consulting with a qualified dentist is the best step forward.
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