Dental Crowns: Cosmetic and Functional Uses

A dental crown is a custom cap that covers the visible part of a tooth to restore its shape, strength and appearance. Dentists mainly use crowns to protect teeth that are cracked, heavily filled or weakened, and sometimes to improve a tooth's look. Whether you need one depends on how much healthy tooth remains after an exam.

Key Takeaways

• A dental crown covers the whole visible part of a tooth, which makes it different from a filling, inlay or onlay that replaces only part of it.
• Crowns are used most often for function: protecting a cracked or weakened tooth, rebuilding a tooth after a large filling or root canal, anchoring a bridge or topping a dental implant.
• Types of dental crowns include all-ceramic, porcelain-fused-to-metal, metal and resin, each with trade-offs in appearance, strength and tooth reduction.
• A conventional crown procedure usually takes two visits, with a temporary crown in between.
• According to Cleveland Clinic, the average dental crown lasts five to 15 years, and care and habits make a large difference.

What is a dental crown?

A dental crown, sometimes called a cap, is a restoration that fits over a prepared tooth like a thimble and is cemented or bonded in place. According to the American Dental Association's MouthHealthy site, a crown restores a tooth to its normal shape and size, strengthens it and can improve its appearance.

A crown replaces the outer surfaces of the tooth, down to about the gumline. The root and the inner core of the tooth stay in place. When a tooth has lost a lot of structure, the dentist may first build a core to support the crown, and in some teeth that have had root canal treatment, a post is placed to help hold that core.

A dental crown is also different from an implant crown. With a natural tooth, the crown sits on your own prepared tooth. With an implant, the crown sits on a connector attached to an implant post in the jaw. Both look similar in the mouth, but they are planned and cared for a little differently.

At Landmark Dental Care, crowns sit alongside related restorative work the practice provides, including bridges, inlays and onlays, implant crowns and crown lengthening. You can read more about how crowns fit with other smile treatments on our cosmetic dentistry page.

When a crown is used to restore a tooth

Most dental crowns are placed for function first. MouthHealthy lists several common reasons for a crown:

• protecting a weak tooth from breaking, or holding together parts of a cracked tooth;
• restoring a tooth that is already broken or badly worn;
• covering and supporting a tooth with a large filling when little natural tooth is left;
• holding a dental bridge in place;
• covering a misshapen or badly discoloured tooth;
• covering a dental implant.

After a root canal

Back teeth that have had root canal treatment are a common reason for a crown. After a root canal, a crown is usually placed to restore the tooth's function and appearance. The treated tooth can become more brittle, and a crown helps protect it from splitting under chewing forces.

Cracked teeth

A crack that runs into a tooth can spread if the tooth flexes each time you bite. Cleveland Clinic describes crowns as one treatment for cracked teeth, covering the tooth to hold it together. Not every crack needs a crown. Cleveland Clinic also notes that a hairline crack that does not cause pain or infection may not need treatment at all.

Crown vs filling

Crown vs filling is one of the most common questions about restorative care. A filling replaces a smaller area of tooth lost to decay or damage, and the rest of the natural tooth still does most of the work. A crown covers the whole tooth, and it is usually chosen when the remaining walls are too thin or cracked to support a filling safely.

Option	What it covers	Often considered when	Tooth structure removed
Filling (composite or amalgam)	Part of the tooth, placed directly	Small to moderate decay or damage	Least, limited to the damaged area
Inlay	Part of the biting surface, made to fit	Moderate damage within the tooth's cusps	Moderate
Onlay	Part of the biting surface, including one or more cusps	Larger damage that still leaves healthy walls	Moderate, often less than a crown
Crown	The whole visible tooth	Large fillings, cracks, root-canal-treated teeth, bridges, implants	Most, as the tooth is shaped all around

MouthHealthy notes that composite fillings provide good durability and resistance to fracture in small- to mid-size fillings. As a filling gets larger, the tooth around it has less support. An inlay or onlay can sometimes protect a tooth with less reduction than a crown, which is why your dentist may suggest one as a middle step.

Anchoring a bridge

A bridge replaces a missing tooth by attaching a false tooth to crowns on the teeth on either side. Those supporting crowns carry extra load, so the health of the anchor teeth and gums matters a great deal in planning.

When appearance is also a goal

Crowns can improve the look of a tooth, but that is rarely the only reason to place one. Because a crown requires shaping the tooth all around, dentists usually reserve crowns for teeth that also have a structural reason to be covered.

A crown may be considered for appearance when a front tooth:

• is badly discoloured and does not respond to whitening, often after an old injury or root canal;
• is misshapen, such as a small peg-shaped tooth, and also has a large filling;
• has several old fillings that have stained or broken down;
• is chipped in a way that is too large to repair with bonding.

When the concern is mostly cosmetic and the tooth is strong, more conservative options often come first. Whitening, composite bonding, tooth contouring or a veneer can change colour or shape while keeping more natural enamel. A good cosmetic plan starts with the least invasive option that will meet the goal and hold up to your bite.

Matching front teeth

Front crowns are often matched to neighbouring natural teeth. If you are thinking about whitening, do it before the crown is made, because porcelain and resin do not whiten. Bring photos of your smile from before an injury if the goal is to match how a tooth used to look.

Types of dental crowns

Types of dental crowns differ mainly in material, and the best choice depends on where the tooth is, how hard you bite and how visible it is. Cleveland Clinic describes several main types:

Type	Appearance	Strength and wear	Notes
All-ceramic or all-porcelain	Most natural-looking	Strong, though can chip	A common choice for front teeth; an option for people with metal allergies
Pressed ceramic	Natural-looking	Hard ceramic core with porcelain layers	Combines a strong core with a tooth-coloured surface
Porcelain-fused-to-metal (PFM)	Tooth-coloured outside	Durable	Combines metal strength with a natural look; the porcelain layer can chip
Metal (gold or other alloys)	Metallic colour	Most durable and longest-lasting	Often used for back teeth that are not visible
All-resin	Tooth-coloured	Most fragile	Lowest-cost material, but more prone to breaking

Some offices also make crowns in a single visit using computer-aided design and milling. Whether that is appropriate, and whether it is available, depends on the office and the tooth. Ask your dentist which material they recommend for your tooth and why.

Implant crowns

An implant crown replaces the visible part of a missing tooth on top of a dental implant. Planning often involves 3D imaging so the dentist can see bone height, width and nearby structures. Landmark Dental Care offers 3D CBCT imaging, and our guide to CBCT for implant planning explains how those scans are used.

The crown procedure: treatment planning and visits

A conventional crown procedure usually takes two appointments. Cleveland Clinic describes a first visit to prepare the tooth and a second visit, often a few weeks later, to place the final crown.

Before the first visit: planning

Your dentist examines the tooth, checks your gums and bite and usually takes X-rays to look at the roots and bone. If the tooth has deep decay or infection, a root canal may be needed before the crown. If the tooth is broken near or below the gumline, crown lengthening may be suggested. Crown lengthening reshapes gum and sometimes bone so there is enough healthy tooth above the gum for the crown to grip and seal.

Visit one: preparation and temporary crown

1. The tooth and surrounding gum are frozen.
2. Old filling material and decay are removed, and a core is built up if needed.
3. The tooth is shaped all around so the crown will fit without looking bulky.
4. An impression or digital scan records the shape of the tooth and your bite.
5. The shade is selected for tooth-coloured crowns.
6. A temporary crown is placed to protect the tooth while the final crown is made.

Between visits: living with a temporary

A temporary crown is held with weaker cement so it can be removed easily. Avoid sticky foods such as caramel or gum on that side, and slide floss out sideways rather than pulling it up. If the temporary comes off, keep it and call the office; our guide to what to do if a filling or crown falls out covers the short-term steps.

Visit two: fitting the final crown

The temporary is removed, and the dentist checks the new crown's fit, colour and bite before cementing or bonding it in place. You may be asked to bite on marking paper several times so high spots can be adjusted. A crown that feels high after the freezing wears off should be checked, since an uneven bite can make the tooth sore.

Special situations

Anxiety. Tell the team if dental visits make you nervous. Crown appointments can be long, and planning breaks helps.

Pregnancy. Let your dentist know. A cracked or painful tooth may need care, while elective crown work can often be timed around your pregnancy.

Medical conditions. Bring your medication list. Blood thinners, diabetes and some other conditions can affect gum healing and planning.

Seniors. Older crowns and bridges may need replacing because of decay at the edges or gum recession. A dentist can check whether the crown or the tooth beneath it is the problem.

How long do crowns last? Maintenance after a crown

How long crowns last depends on the material, the tooth, your bite and how well the edges are kept clean. According to Cleveland Clinic, "the average lifespan of a dental crown is five to 15 years," and some crowns last much longer with good care. That is an average, not a promise for any single tooth.

The most common reasons a crown needs replacing are:

• New decay at the edge. The tooth under a crown can still decay where the crown meets the tooth.
• Gum disease or recession. Receding gums can expose the crown margin or root surface.
• Chipping or fracture. Porcelain can chip, especially with grinding or biting hard objects.
• Wear or loosening. Cement can wash out over many years.

Daily care

• Brush twice a day with fluoride toothpaste, paying attention to the gumline around the crown.
• Clean between teeth every day with floss or interdental brushes. Under a bridge, a floss threader or water flosser can help.
• Avoid chewing ice, hard candy or popcorn kernels on crowned teeth.
• Wear a nightguard if you grind or clench, and a sports mouthguard for contact sports.

Professional care

Keep regular checkups and cleanings. At recall visits your dentist checks the crown margins, bite and gums, and X-rays can show decay under the edges that you cannot see or feel. Sensitivity, a bad taste, a dark line that is getting wider, or a crown that moves are all reasons to call sooner.

Coverage differences in general terms

Coverage for a dental crown depends on why it is being placed and what plan you have. We do not publish crown prices online, because the fee depends on the tooth, the material and whether other treatment, such as a core, post, root canal or crown lengthening, is needed first.

Factors that affect cost include:

• the crown material and whether it is made in a lab;
• whether a core, post or crown lengthening is needed;
• whether a root canal is needed first;
• for implant crowns, the implant parts and imaging needed for planning.

Many private plans treat crowns as a major service, which can mean waiting periods, annual maximums or a lower percentage of coverage than basic care. Check your own plan's terms. Crowns placed purely for appearance may be considered elective and may not be covered. Treatments that improve function, such as crowns, may be partially covered when they are needed for health reasons. Ask the office to send a predetermination before treatment.

If you have Canadian Dental Care Plan coverage, canada.ca lists crowns as a major restorative service as of 2026. Crowns, the cores that support them and posts for crowns all require preauthorization, and co-payments and additional charges may apply. See our CDCP page and call 902-893-2919 to confirm current participation and billing.

Getting a dental crown in Truro

Landmark Dental Care is a family general practice at 125 Queen St in downtown Truro, and restorative dentistry is a special area of interest for the practice. Our general dentistry services include crowns and bridges, inlays and onlays, implant crowns and crown lengthening, so a damaged tooth can be assessed and planned in one place.

If a crown has come loose or a tooth has cracked, call 902-893-2919 during office hours, Monday to Friday, 8:30am to 5:00pm. Patients come to us from Truro, Bible Hill and across Colchester County. Nova Scotians can call 811 at any time for nurse advice. For spreading facial swelling or difficulty breathing or swallowing, call 911 or go to the Emergency Department at the Colchester East Hants Health Centre.

FAQ

Does getting a dental crown hurt?

The tooth is frozen for the preparation visit, so most people feel pressure rather than pain. It is common for the tooth and gum to feel tender for a few days afterward. Pain that gets worse or lasts should be checked.

Can a crown fall off?

Yes, occasionally. Temporary crowns come off more easily, and permanent crowns can loosen if the cement washes out or the tooth beneath decays. Keep the crown and call your dentist rather than gluing it yourself.

Can a tooth with a crown still get a cavity?

Yes. The crown itself cannot decay, but the natural tooth where the crown meets it can. Brushing at the gumline, cleaning between teeth and regular checkups help catch problems early.

Is a crown better than a large filling?

Not always. A filling keeps more natural tooth and is often the right choice for small to moderate damage. A crown is usually recommended when the remaining tooth is too weak or cracked to support a filling safely.

Can crowns be whitened?

No. Porcelain and resin crowns do not change colour with whitening. If you want whiter teeth, whiten first and then match the new crown to your final shade.

Next step

If you have a cracked, heavily filled or discoloured tooth and want to know whether a crown is the right choice, explore cosmetic dentistry at Landmark Dental Care. Call 902-893-2919 or use our contact page to book an exam at 125 Queen St, Truro.

References

• MouthHealthy (ADA): Crowns
• Cleveland Clinic: Dental Crowns
• MouthHealthy (ADA): Composite Fillings
• Cleveland Clinic: Cracked Tooth (Fractured Tooth)
• Government of Canada: Canadian Dental Care Plan – What is covered

This article provides general educational information and is not a diagnosis or a substitute for care from a dentist or other qualified health professional.