Dental crowns are made from different materials, and it is very important to make the right choice for each specific case.
What is a dental crown, what types are available, and which one should you choose?
What Is a Dental Crown?
A dental crown is a prosthetic restoration used to preserve teeth with extensive damage. A crown resembles a cap that completely covers the tooth while mimicking its natural appearance and color. Crowns are designed to restore both the aesthetics and function of teeth.
Dental crowns restore the shape, size, and strength of damaged teeth. They protect teeth weakened by decay, as well as teeth that have undergone root canal treatment. Crowns can also be used to cover severely discolored teeth, misshapen teeth, dental implants, or teeth with large fillings.
Types of Dental Crowns
Different types of dental crowns include ceramic, metal, porcelain-fused-to-metal, composite resin, and others. Each type has unique characteristics, advantages, and disadvantages.
When choosing a material for a dental crown, the following factors should be considered:
- Durability
- Comfort
- Aesthetics
- Cost
- Overall oral health condition
The dentist plays a crucial role in the crown selection process, as they evaluate the condition of the teeth and oral cavity and have a thorough understanding of the properties of crown materials.
What types of dental crowns are available?
Porcelain-Fused-to-Metal (PFM) Crowns
Porcelain-fused-to-metal crowns are among the most common types of dental crowns. These crowns have been considered a standard solution for more than 50 years and continue to perform their function successfully. They combine the strength and durability of metal with the aesthetic properties of ceramic.
These crowns feature a framework made from an alloy of different metals. The alloy commonly contains metals such as nickel, chromium, and palladium, although the exact composition may vary depending on the manufacturer and dental laboratory.
One of the most noticeable disadvantages is the dark line that may appear near the gum line after several years. While this does not harm the tooth, it may affect the aesthetic appearance. In addition, preparing a tooth for a porcelain-fused-to-metal crown requires the removal of more tooth structure compared to some alternative options.
The main advantages of these crowns are their strength and lower cost compared to metal-free crowns.
Composite Crowns
Dental composite is a form of synthetic resin. Although composite materials are commonly used for fillings, they can also be used to fabricate full crowns.
These crowns may be suitable for patients who are sensitive to both metal and ceramic materials.
The main advantage of composite crowns is their affordable cost. However, their primary disadvantage is that the material is prone to staining. They are also less durable and long-lasting than other crown types. Nevertheless, composite crowns can be a good option for temporary restorations.
Ceramic Dental Crowns
A ceramic crown does not contain a metal framework and is made entirely of ceramic.
These crowns have become increasingly popular due to their superior aesthetic properties.
If you prefer a metal-free restoration and want your teeth to look as natural as possible, a ceramic crown may be one of the best options available.
All-ceramic crowns reflect light more naturally, resulting in a highly lifelike appearance. They are also an excellent choice for patients with metal allergies.
However, ceramic crowns are generally less resistant to heavy forces than some alternatives and may be more expensive than metal-containing restorations.
Zirconia Crowns
Zirconium dioxide is a ceramic material that has become one of the best alternatives for dental crowns.
This metal-free material offers excellent biocompatibility, meaning it integrates well with the body’s tissues, while also providing exceptional aesthetic results.
In addition, zirconia is highly durable while placing less wear on opposing teeth than some ceramic materials. Zirconia crowns are also thinner than crowns made from many other materials, meaning less natural tooth structure needs to be removed during preparation.
Metal Crowns
Metal crowns are made from various metals, including gold.
Gold crowns are known for their exceptional durability and longevity; however, their unnatural appearance is their most obvious drawback. As a result, they are relatively uncommon today.
Instead, crowns are often fabricated from other metal alloys such as chromium and palladium, which provide strength comparable to gold but have a gray metallic color.
Teeth prepared for these crowns require less reduction because the metal alloy is strong and does not require an additional ceramic layer.
However, metal alloys may cause allergic reactions or swelling in some patients. Another significant disadvantage is their appearance. For this reason, they are often used for back teeth or posterior restorations.
E-max Crowns
E-max is the general name for crowns made from a material called lithium disilicate. It is another type of metal-free ceramic crown known for its excellent aesthetic properties.
Lithium disilicate is highly durable and has a natural appearance due to its translucency. Like other metal-free crowns, E-max crowns require minimal tooth preparation before placement.
These crowns are generally more expensive because of the material’s superior optical properties. However, they are not as strong as zirconia crowns.
Choosing the Right Type of Dental Crown
The choice of crown depends primarily on the patient’s individual needs.
Which Type of Dental Crown Looks the Best?
E-max crowns offer some of the best aesthetic results. They are slightly translucent and reflect light in a manner very similar to natural tooth enamel. As a result, these crowns often look almost identical to natural teeth.
However, similar aesthetic outcomes can also be achieved with other high-quality ceramic crowns.
Which Crown Is the Most Durable?
Metal crowns are the strongest type of dental crown. They can withstand heavy forces in the mouth over a long period of time.
However, because they are the least aesthetic option, many patients choose porcelain-fused-to-metal crowns, which provide both durability and an attractive appearance. This balance between strength and aesthetics is one of the reasons why porcelain-fused-to-metal crowns remained popular for many years.
Today, however, most people prefer metal-free restorations. For this reason, zirconia crowns have become an excellent alternative, especially monolithic zirconia crowns, which are milled from a single block of zirconia.
Which Crowns Are More Affordable and Which Are More Expensive?
The cost of dental crowns varies significantly depending on the material used.
Ceramic and porcelain crowns are generally more expensive, while metal and porcelain-fused-to-metal crowns are usually more affordable.
When choosing a crown material, it is important to consider not only your budget but also the longevity of the restoration. Some materials may be less expensive initially but may not provide the same long-term durability.
How Does Lifestyle Affect Crown Selection?
A stronger crown material, such as metal or zirconia, may be a better choice if you regularly eat hard foods or tend to snack frequently throughout the day.
What Types of Crowns Are Offered at Yarema Dental?
At Yarema Dental, patients are offered ceramic and zirconia crowns.
Ceramic crowns are manufactured using CAD/CAM technology, which utilizes advanced computer-aided design and manufacturing systems. This approach shortens production time while ensuring a highly accurate fit.
For zirconia crowns, Yarema Dental uses premium zirconia materials from Amann Girrbach, a company with many years of experience in the development and production of zirconium dioxide.
This multilayered, translucent, yet highly durable zirconia material is available in a palette of 16 different shades.
The Process of Restoring a Tooth with a Zirconia Crown. Restoring a damaged tooth with a zirconia crown typically requires two appointments.
During the first visit, the dentist evaluates the overall condition of the oral cavity and prepares the tooth. The tooth is then digitally scanned, and the impression is sent to a dental laboratory for crown fabrication. A temporary protective crown is placed on the tooth during this period.
Once the final restoration is completed, the permanent crown is fitted and bonded to the tooth.
Which Is Better: Zirconia or Ceramic Crowns?
Both options offer numerous advantages; however, there are several important differences.
Zirconia crowns are stronger and can withstand greater chewing forces. For this reason, they are often recommended for posterior teeth.
Ceramic crowns provide superior optical qualities and aesthetics but are not as durable as zirconia crowns. Therefore, they are often considered the preferred option for restoring front teeth.
Tips for Caring for Dental Crowns
Proper care and regular dental check-ups are essential for maintaining dental crowns, regardless of the material used.
To prolong the lifespan of your crowns:
- Maintain good oral hygiene.
- Avoid hard foods that may damage your crowns, especially if they are made from less durable materials.
- Attend regular dental examinations and professional cleanings.
Choosing the right dental crown material is an important decision that can affect your oral health, comfort, appearance, and confidence. Therefore, it is always advisable to seek professional guidance from an experienced dental specialist.
This article does not replace a medical consultation. For complete and personalized information, please consult your dentist.