What Is the Difference Between Dental Crowns and Veneers?

If you’ve been researching ways to improve the appearance of your teeth, chances are you’ve heard of both dental crowns and veneers. They get thrown around rather liberally these days. When you read about them online, it almost seems like they do the same thing. They are both custom made tooth coverings that go on top of your natural teeth. They can both improve the appearance of a tooth. They both require a minimum of two appointments to complete.

Here’s the thing. They correct very different issues, require very different amounts of tooth preparation, and are not interchangeable. Picking the wrong option for your needs could lead to unnecessary procedures, increased cost, or removal of more of your natural tooth than is necessary.

Let’s discuss the difference between dental crowns vs veneers so you can feel confident going into your next dental visit.

What Is a Dental Crown?

A dental crown is a full-coverage cap that fits entirely over a tooth, from the gum line up. It surrounds the tooth on all sides and replaces the visible portion of the tooth above the gum. As part of a Smile Makeover, dental crowns can help restore the shape, strength, and appearance of damaged or discolored teeth, creating a more attractive and confident smile.

Crowns serve a structural purpose first and a cosmetic purpose second. Dentists use them when a tooth is too damaged, weakened, or compromised to hold together on its own. Common situations where a crown is the right treatment include:

• A tooth with a very large cavity where not enough healthy tooth structure remains for a filling

• A tooth that has cracked or broken significantly

• A tooth that has undergone root canal treatment, which leaves the tooth brittle and prone to fracturing

• A tooth that is severely worn down from grinding (bruxism)

• A dental implant, where a crown is placed on top of the implant post to function as a replacement tooth

• A tooth being used as an anchor for a dental bridge

Crowns can be made from several materials. Porcelain-fused-to-metal (PFM) crowns have a metal inner core with a porcelain outer layer, offering strength and an acceptable appearance. All-ceramic or all-porcelain crowns look the most natural and are commonly used for front teeth. Zirconia crowns combine excellent strength with good aesthetics and are increasingly used for both front and back teeth. Metal crowns (gold or silver alloy) are the most durable option and are typically reserved for back molars where appearance is less of a concern.

What Is a Dental Veneer?

A dental veneer is a thin shell, typically 0.3 to 0.7 millimetres thick, that bonds to the front surface of a tooth only. It does not wrap around the entire tooth. Think of it like a protective cover on the face of the tooth rather than a cap over the whole thing.

Veneers are primarily a cosmetic treatment. They work best when the underlying tooth is structurally healthy but has cosmetic issues that brushing, whitening, or other simple treatments cannot fix. Common uses for veneers include:

• Permanent discolouration that does not respond to professional whitening, such as staining from tetracycline antibiotics or fluorosis

• Small chips or minor cracks on front teeth

• Teeth that are slightly smaller than neighbouring teeth or unevenly shaped

• Mild gaps between front teeth

• Minor crowding or misalignment when orthodontic treatment is not preferred

Typically, veneers are fabricated from porcelain or composite resin. Porcelain veneers resist stains better and are more durable. They also appear more natural than composite resin veneers because porcelain is translucent. Unlike porcelain veneers, composite veneers can be placed directly on the tooth without any laboratory steps. This allows them to be completed in a single visit, making them less expensive. However, they will not last as long as porcelain veneers and are more likely to stain.

The Biggest Difference: How Much Tooth Is Removed

This is the single most important distinction between the two treatments, and it is one that patients rarely hear explained clearly.

For a veneer: The dentist removes only a thin layer of enamel from the front surface of the tooth, typically between 0.3 and 0.7 millimetres. The sides and back of the tooth remain completely untouched. Most of the natural tooth structure stays intact.

For a crown: The dentist removes tooth structure from all sides, reducing the tooth by 1.5 to 2 millimetres all around. A research analysis published in PubMed Central found that crown preparation removes approximately 57% of the tooth's volume on average, compared to around 28% for a porcelain veneer preparation on the same tooth. Once a tooth has been prepared for a crown, it will always need a crown. It cannot go back to a veneer because the tooth has been trimmed too far to support one.

This is why dentists follow a principle called minimal intervention: they aim to do the least amount to a tooth that achieves the desired outcome. If a tooth only needs cosmetic improvement and is structurally sound, a veneer preserves far more of the natural tooth than a crown would.

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