When Is a Crown versus Filling Needed?

Many people face the decision of whether to get a dental crown or a dental filling when treating a damaged or decayed tooth.

In Australia, where tooth decay is one of the most common chronic health conditions, this choice is something countless patients encounter each year. Knowing the difference between a crown and a filling can make the conversation with your dentist clearer and less stressful, as dentists use their expertise to evaluate your situation and recommend the best treatment option.

This article explains what each treatment involves, the key differences between them, and when one might be more suitable than the other.

What Is a Filling?

A filling is one of the simplest and most common dental treatments. It is used when part of a tooth has been damaged by decay or a small chip. The dental filling procedure involves the dentist removing the decayed portion of the tooth and replacing it with a material that restores its shape and function. Dental fillings is the general term for these restorations.

Common filling materials include:

• Composite resin: Composite fillings are tooth-coloured and blend naturally with your teeth. They are especially suitable for minor repairs and cosmetic purposes.
• Amalgam: Amalgam fillings are a silver-coloured material known for their durability and are typically used for back teeth, though they are less common today due to aesthetic concerns.
• Glass ionomer: Sometimes used in areas that are not under heavy chewing pressure, such as along the gumline.

The procedure is typically quick, often completed in a single visit. After numbing the weakened teeth, the dentist cleans out the decay, shapes the space, and bonds the filling material into place, helping to restore the tooth’s structure.

Fillings are considered a conservative treatment because they only replace the damaged part of the tooth, leaving most of the natural structure intact.

What Is a Crown?

A custom made crown, often called a “cap”, is a type of dental crown that is individually crafted for each patient to cover the entire tooth. Rather than just filling a small hole, a dental crown encases the entire visible portion of the tooth, acting as a protective cap to restore its natural tooth structure, strength, shape, and appearance.

Crowns are usually recommended when a tooth is too weak for a filling alone. This might be due to a large cavity, a crack, or after treatments such as a root canal or root canal therapy. Crowns are also used for cosmetic reasons, such as restoring a tooth that is discoloured or worn down.

Different crown materials include:

• Porcelain or ceramic: Aesthetic and natural-looking, often used for front teeth. Porcelain crowns are especially valued in cosmetic dentistry for their ability to closely mimic natural tooth enamel.
• Porcelain-fused-to-metal: Stronger, with a natural appearance.
• Gold or metal alloys: Very durable, often used for molars where appearance is less important.

Getting a dental crown usually takes two visits. The dentist prepares the tooth by shaping it down, then takes an impression or digital scan. A temporary crown may be placed while the permanent one is created in a lab. At the second visit, where the dental crown procedure takes place, the permanent crown is fitted and cemented into place. Some practices offer same-day crowns using digital milling technology.

Key Differences of Crown vs Fillings

Crowns and fillings serve different purposes, and the choice depends on the extent of tooth damage. Crowns and fillings differ significantly in their application, durability, and suitability for different types of tooth repair. Here’s a comparison to make it easier to see where they differ:

The choice between a crown and a filling depends on the extent of damage or decay, the location of the tooth (such as back teeth), and the need to restore the tooth’s function and appearance. Dentists evaluate each case to determine the best approach for tooth repair and restoring the tooth’s function.

When Is a Filling the Best Option?

Fillings are a good choice when the damage to the tooth is minimal. If a cavity is caught early, the affected area can be cleaned and restored with a small filling, preserving most of the natural tooth.

Common situations where a filling is the right treatment:

• Small cavities: When decay has only affected a limited part of the enamel or dentine.
• Minor chips or wear: A chipped tooth or small area of erosion can often be restored with a bonded filling.
• Cost-effective treatment: For patients who only need a quick repair without extensive dental work.

Fillings are a conservative option because they maintain the bulk of the natural tooth. They are less invasive, quicker to complete, and cheaper than crowns. That said, fillings are not suitable for every situation. If the decay or fracture is too extensive, a filling may not provide enough strength, and the tooth could be at risk of breaking.

When Is a Crown Needed?

A tooth crown is recommended where a filling would not provide enough support.

Scenarios where a crown is often the best choice:

• Large cavities or old fillings: If much of the tooth has already been lost to decay or repaired with a large filling, the remaining structure may not be strong enough to hold a new filling.
• Broken teeth or severely damaged teeth: Crowns are ideal for restoring broken teeth or teeth that are extensively damaged, providing durable and comprehensive protection.
• After root canal treatment: Teeth that have had a root canal can become brittle. A crown helps prevent fractures and extends the life of the tooth. Research shows that teeth restored with a crown after root canal treatment have higher long-term survival rates.
• Cracked or fractured teeth: A crown can hold the tooth together and stop cracks from spreading.
• Excessive wear or grinding: Teeth that are significantly worn down may need crowns to restore their proper size and function.
• Cosmetic improvements: Crowns can also be used to cover teeth that are badly shaped or discoloured.

Crown covers are more protective than fillings and can save a tooth that might otherwise be lost. They help prevent further damage to compromised teeth, ensuring long-term oral health. While they cost more and involve more visits, they can prevent serious dental issues in the future.

Tooth Restorations Cost and Longevity Considerations

The cost of treatment is a big factor when choosing between a crown and a filling.

At Odontologie Dental Care, a dental crown is from $2,000 per tooth, and a same-day CEREC crown is also from $2,000. Fillings are priced after your dentist has examined the tooth, because the fee depends on its size and the material.

As a general Australian range, a filling typically costs between $150 and $300 depending on size and material, while crowns generally cost from $1,000 to $2,500, as they require custom design and fabrication. See our dental crowns and tooth fillings pages for more.

The higher cost of crowns is balanced by their durability.

Fillings generally last around 5-10 years, though some may wear out sooner, especially if they are large. Crowns, by contrast, often last 10-15 years, with many lasting longer when properly cared for.

Both fillings and crowns are covered differently by private health funds. Fillings usually fall under general dental cover, while crowns are classed as major dental, which may involve waiting periods or lower rebate percentages. It is worth checking the details of your health fund to know what your out-of-pocket costs will be.

Thinking about longevity, crowns can be a worthwhile investment when a tooth is badly damaged. They reduce the risk of further treatment down the line, such as extractions or implants. For smaller issues, a filling is a reliable and cost-effective choice.

Choosing the right restoration is important for maintaining your long-term oral health, preventing further dental problems, and having a healthy smile.

Key Takeaways

• Fillings are suited for small cavities or minor chips.
• Crowns are needed when a tooth is weak, cracked, or has had a root canal.
• Fillings are cheaper and quicker, but crowns last longer and offer more protection.
• At Odontologie, a crown is from $2,000 and fillings are priced after an examination. Across Australia, crowns generally cost $1,000 - $2,500, while fillings usually range between $150 - $300.
• Choosing the right treatment depends on the extent of the damage and the long-term health of the tooth.