A root canal does not include a crown. They are two separate procedures, billed under different codes, often performed at different appointments and sometimes by different dentists. The root canal treats the infection inside your tooth, while the crown protects what’s left of the tooth afterward. Most people will need both, but the crown is an additional step with its own cost.
Why They’re Billed Separately
The American Association of Endodontists lists root canal therapy codes with the explicit note “excluding final restoration.” That means the root canal covers everything involved in cleaning out the infected pulp and sealing the canals, but nothing beyond that. If you need a crown, a core buildup, or even a simple filling to close the access hole, each is a separate line item on your bill.
In practice, this means you might pay for the root canal at one visit, then return to your general dentist weeks later for a buildup and crown, each with its own fee. If your endodontist (root canal specialist) places a temporary filling to seal the opening, that may or may not be included in their root canal charge. Ask before your appointment so the total cost doesn’t catch you off guard.
What Happens Between the Root Canal and the Crown
After a root canal, your tooth is hollow. The nerve and blood supply have been removed, and the dentist has drilled an access hole through the top of the tooth to reach the canals. A temporary filling typically seals that opening, but it’s not designed to last.
Before a crown can go on, many teeth need what’s called a core buildup. This is a filling material that replaces the missing internal structure and reshapes the tooth into a solid stump the crown can grip onto. Some teeth that have lost significant structure also need a small post placed into one of the root canals for added support. The buildup restores the original shape of the tooth so the lab can craft a crown that fits precisely. Think of it as rebuilding the foundation before putting on the roof.
Most dentists recommend placing the permanent crown within one to two weeks after the root canal, especially on back teeth. A delay of a few weeks is generally fine if a temporary restoration is protecting the tooth, but waiting three to six months increases the risk of fracture, reinfection, or outright failure significantly.
Which Teeth Actually Need a Crown
Not every root canal tooth requires a crown, but most do. The deciding factor is where the tooth sits in your mouth and how much healthy structure remains.
Back teeth (premolars and molars) almost always need a crown. Research published in the Journal of Conservative Dentistry found that coronal coverage significantly improved the long-term success of root canal-treated premolars and molars. These teeth absorb powerful chewing forces that act like a wedge, pushing the cusps apart. A tooth that’s been hollowed out and weakened by decay and drilling is vulnerable to cracking under that pressure. Without a crown, a molar may last only a few months to a couple of years before fracturing.
Front teeth are a different story. The same research found that crowns did not significantly improve outcomes for anterior teeth. Front teeth bear less chewing force and are loaded differently, mostly from the front rather than straight down. A simple composite filling over the access hole is often enough. The exceptions are front teeth that already had large fillings, multiple restorations, or cosmetic damage that a filling alone can’t address.
What Happens If You Skip the Crown
A root canal removes the nerve and blood supply from your tooth. Over time, this makes the tooth more brittle because it no longer receives moisture and nutrients from the inside. The structural damage from the original decay, plus the drilling required for the root canal itself, compounds the problem.
Without a protective crown on a back tooth, the most common failures are vertical cracks and fractures. These can be subtle at first. You might not feel pain for months or even years (since the nerve is gone), but bacteria can migrate into micro-cracks and cause a new infection around the root. By the time symptoms appear, including swelling, a persistent dull ache, or pain when biting, the tooth may be unsalvageable. At that point, the only option is extraction, which means the entire investment in the root canal is lost.
Crown Alternatives for Some Teeth
A full crown isn’t the only protective option. For root canal-treated molars that still have most of their structure intact, with only one wall damaged, an onlay can be a more conservative choice. An onlay covers the biting surface and wraps over the weakened cusps without requiring the dentist to shave down as much healthy tooth. An 18-month clinical study comparing metal onlays to full crowns on root canal-treated molars with a single damaged wall found that onlays performed comparably, preserving more natural tooth in the process.
Your dentist will assess how much tooth structure remains and how many walls are intact. If two or more walls are compromised, a full crown is typically the safer choice.
Crown Materials for Root Canal Teeth
The material your dentist recommends usually depends on the tooth’s location. For molars, zirconia crowns are a popular choice because of their exceptional strength, with flexural strength ratings of 900 to 1,200 MPa, making them three to ten times stronger than traditional porcelain. That durability matters on a back tooth absorbing heavy bite forces all day.
For front teeth that do need a crown, porcelain options like lithium disilicate offer a good balance of strength (around 400 MPa) and natural translucency that blends with surrounding teeth. Older feldspathic porcelain, at roughly 100 MPa, is less common now for root canal teeth because of its lower fracture resistance. Your dentist can help match the material to your specific situation, factoring in bite force, aesthetics, and whether you grind your teeth at night.
The Real Cost to Plan For
When budgeting for a root canal, plan on three potential charges: the root canal itself, a core buildup, and the crown. If you’re seeing an endodontist for the root canal and then returning to your general dentist for the crown, you may receive two separate bills from two offices. Dental insurance often covers a portion of each, but they may apply different benefit categories or waiting periods to the root canal versus the crown. Call your insurance before treatment starts to confirm what’s covered under each code, so you know your actual out-of-pocket number before you’re sitting in the chair.