How Long Does a Dental Crown Last?

What is the Purpose of a Dental Crown?

According to the American Dental Association (ADA), a dental crown strengthens a tooth that lacks sufficient structure to support a large filling. Additionally, a dentist may recommend a dental crown to:

1. Restore a broken or cracked tooth.

2. Protect weak teeth from further damage.

3. Support dental bridges.

4. Safeguard a brittle tooth following a root canal.

Dental crowns can be made from various materials, some lasting longer. The average lifespan of a crown is about 10 years. However, with proper construction and care, crowns made from durable materials can last for decades.

When deciding on the most suitable crown material, your dentist will evaluate strength, durability, and aesthetics. Additional considerations include:

• The location of the tooth.

• How much of the natural tooth remains.

• How visible the crown will be when you smile.

Types of Dental Crowns and Their Longevity

Zirconia Crowns

Zirconia crowns are a type of ceramic crown made from zirconium dioxide, a highly durable material related to titanium. They are exceptionally resistant to fractures, making them the strongest non-metallic option for dental crowns.

A 2016 study found that zirconia crowns are the least likely to crack under high bite forces. With proper oral hygiene, zirconia crowns can last 10-15 years or even longer.

Porcelain-Fused-to-Metal (PFM) Crowns

PFM crowns combine a metal base with a porcelain exterior, offering a natural appearance suitable for front teeth. These crowns have been a popular choice in dentistry for over 60 years. However, porcelain is prone to chipping, and receding gums may expose the metal edge over time.

PFM crowns typically last 5-15 years but may last longer with good dental care.

Lithium Disilicate Crowns

Lithium disilicate crowns are made from a glass-ceramic material that combines strength with aesthetic appeal. Dentists can fabricate these crowns in-office using specialized equipment, allowing for same-day placement.

These crowns are durable, fit well, and blend seamlessly with natural teeth. With proper care, they can last 5-15 years or longer.

Gold Crowns

Gold crowns have been used for over 100 years due to their strength, resistance to wear, and excellent fit. A 2015 review found that gold crowns have a 95% survival rate after 10 years and can last for decades with proper care.

The main drawback is their appearance, which is why gold is often reserved for molars that are not visible when smiling. Modern gold crowns are often alloyed with other metals like palladium or nickel to enhance strength and reduce costs.

Crowns vs. Veneers

The main difference between a crown and a veneer is the coverage. A crown encases the entire tooth, while a veneer covers only the front surface. Crowns are thicker and more durable, making them a better choice for teeth with significant decay, cracks, or wear. Veneers are typically recommended for cosmetic purposes.

The lifespan of veneers and crowns is similar, but veneers may not last as long due to their thinner structure. Your dentist can help determine the best option for your specific needs.

When Should a Dental Crown Be Replaced?

The need to replace a crown is typically determined through a clinical examination or dental X-rays. Warning signs that a crown may need replacement include:

• Visible decay around the crown.

• An open margin where the crown does not fit securely on the tooth.

• A broken crown or gap allowing food and bacteria to accumulate.

If any of these issues arise, consult Beach Cities Dentistry to evaluate whether a replacement is necessary.