Crowns are one of dentistry's most commonly recommended procedures, and one of the most profitable. A typical crown costs the patient $800-1,500 and takes a dentist about 60-90 minutes of chair time across two visits. They're among the best margin procedures in general dentistry.
That doesn't mean crowns are bad, or that dentists recommend them inappropriately most of the time. Crowns are often the right answer when a tooth has extensive decay, a cracked structure, or has been weakened by a root canal. But the phrase "I think we'll need a crown on that" gets said a lot — more often, some would argue, than the clinical picture strictly requires.
This article is about what goes into the decision between a crown and less invasive alternatives, and what you should ask before saying yes.
When a crown is clearly the right call
- After a root canal on a posterior (back) tooth. Endodontically treated molars are brittle and typically need a crown to prevent fracture. Front teeth after root canal sometimes don't need crowns if the access opening is small.
- Extensive decay covering multiple surfaces. When more than about 50% of the tooth's clinical crown structure is decayed or missing, a traditional filling often won't hold.
- Cracked tooth syndrome with clinical symptoms. Crowns reinforce cracked teeth and prevent the crack from propagating.
- Badly worn teeth with functional problems. Severely worn teeth may need crowns to restore proper bite.
In these cases, crowns aren't just reasonable — they're standard of care.
When a crown is borderline
Borderline cases are where patients should ask the most questions:
Large fillings that fill part of a tooth
When decay affects one or two surfaces of a tooth, a filling is often the correct treatment. When it affects three or more surfaces, some dentists recommend crowns, others recommend large composite fillings. Both can work. The crown is more durable long-term but costs 3-5x more and requires more tooth structure to be removed.
Ask: "What percentage of the tooth is remaining? Would a large filling or an onlay be appropriate here instead?"
Teeth with old, large fillings that are still intact
Some dentists recommend preemptive crown placement on teeth with large existing fillings, even when the filling itself is still functional. The argument is that eventually the tooth or filling will fail, and a crown prevents a future problem. This is defensible but also a judgment call.
Ask: "Is this filling currently failing, or is this a preventive recommendation? What's the likely timeline if we wait?"
Hairline cracks without symptoms
Visible cracks on teeth are common, especially in older adults. Most are stable for years or decades. Some dentists recommend crowns as preventive measure; others recommend watchful waiting unless symptoms develop.
Ask: "Am I having any symptoms from this crack? If we take the watchful waiting approach, what signs should I watch for?"
Less invasive alternatives
Onlays
An onlay is essentially a partial crown — it covers the biting surface and replaces parts of the cusps of a tooth, but doesn't wrap the entire circumference. Onlays preserve more natural tooth structure than full crowns while providing similar durability for moderately damaged teeth.
Why they're underused: onlays are technically more demanding to place than crowns. Some dentists don't routinely offer them. Some don't feel confident with the technique. And they typically cost only slightly less than crowns, so the dentist has less financial reason to push them.
If you want an onlay, ask specifically: "Would an onlay be clinically appropriate here?" If your dentist says no, ask why. If they say yes but recommend a crown anyway, ask why.
Inlays
An inlay is like a very large, custom-made filling that's fabricated in a lab and bonded into the tooth. Appropriate for medium-sized cavities on teeth that aren't structurally compromised. More durable than traditional fillings, less invasive than crowns.
Large composite fillings
Modern bonded composite fillings can successfully restore surprisingly large portions of teeth. They're less durable than crowns for heavily loaded teeth, but for teeth without extreme biting forces, a large composite can last many years.
Core buildups with observation
For borderline teeth, a dentist can sometimes place a core buildup (essentially a large bonded filling that restores the tooth to its original shape) and observe for 6-12 months before deciding whether a crown is necessary.
Questions to ask before agreeing to a crown
- What percentage of the natural tooth structure is remaining?
- Are there less invasive alternatives — onlay, inlay, large filling, core buildup with observation?
- What's the clinical urgency? Can we watch this for 6 months?
- If we proceed with a crown, what material — porcelain, zirconia, gold, PFM? (Different materials have different cost, aesthetics, and durability trade-offs.)
- What's the all-in cost including crown prep, impressions, temporary, and final cementation?
- What's the warranty or redo policy if the crown fails within X years?
Most of these questions have good answers from most dentists. The questions themselves signal that you're an engaged patient who will notice if recommendations don't align with your clinical picture.
When to get a second opinion
Any crown recommendation on a tooth without obvious major damage deserves a second opinion, especially if multiple crowns are being recommended in the same treatment plan. A bill for three crowns is $2,400-4,500. A second opinion for $149 is excellent insurance against over-aggressive treatment.
DentalPlanRx's Second Opinion is designed exactly for this. Upload your treatment plan and x-rays; an independent licensed dentist gives you a second opinion within 24 hours. Join the waitlist to be first when DentalPlanRx launches in your state.