Overview: Choosing Between Zirconia and Porcelain Crowns
This guide compares zirconia and porcelain-fused-to-metal (PFM) crowns so you can discuss the right option with your dentist. A dental crown is a cap that covers a damaged tooth to restore its shape, strength, and appearance [2].
Zirconia and PFM are two of the most common crown materials used today. Both can last many years when placed well and cared for properly. They differ in how they look, how they feel against opposing teeth, and how they hold up under heavy biting forces.
This guide is for patients who have been told they need a crown and want to understand their material choices. It is also useful for people exploring options for a chipped, cracked, or heavily restored tooth. For complex cases, a the prosthodontics page can help you learn more about specialists who focus on crowns and other tooth restorations.
Key Information About Zirconia and PFM Crowns
Zirconia crowns are all-ceramic restorations milled from zirconium dioxide, while PFM crowns layer porcelain over a metal core. Each material has trade-offs in strength, esthetics, and tooth preparation.
Both options have been studied extensively in dental literature. According to the American College of Prosthodontists, crown selection depends on the tooth's location, the patient's bite, esthetic goals, and the condition of the remaining tooth structure [1]. A systematic review of clinical studies reported 5-year survival rates of about 95 percent for monolithic zirconia crowns and about 94 percent for PFM crowns, with both materials performing well over time [3].
What Is a Zirconia Crown?
A zirconia crown is a single-material ceramic crown made from zirconium dioxide, a very hard white ceramic. It contains no metal, which means there is no dark line where the crown meets the gum.
Zirconia comes in different formulas. Monolithic (solid) zirconia is the strongest and is often used for back teeth, with reported flexural strength values often exceeding 900 MPa for traditional 3Y-TZP zirconia [4]. Layered or high-translucency zirconia is more lifelike and is often used when appearance matters most, such as for front teeth, though strength values are typically lower than monolithic zirconia.
- Material: zirconium dioxide ceramic, no metal
- Strength: very high, resists chipping and fracture
- Appearance: metal-free, more translucent in newer high-esthetic formulas
- Common uses: back teeth, grinders, implant crowns, full-arch bridges
What Is a Porcelain-Fused-to-Metal (PFM) Crown?
A PFM crown has a metal substructure (often a noble or base metal alloy) with porcelain baked over the top. The metal gives the crown strength, and the porcelain gives it a tooth-like appearance.
PFM crowns have been used since the 1960s and remain one of the most studied crown systems in dentistry [3]. Their main cosmetic limitation is that the metal margin can become visible as a thin gray line if the gum recedes over time. The outer porcelain layer can also chip under heavy biting forces. A systematic review of single-crown studies estimated a 5-year ceramic chipping or fracture rate of about 3 percent for PFM crowns, with higher rates reported for multi-unit bridges than for single crowns [3].
- Material: metal alloy core with porcelain layered on top
- Strength: strong core, but outer porcelain can chip
- Appearance: lifelike when new, may show a dark line at the gumline later
- Common uses: back teeth, bridges, cases needing a long-tested option
How They Compare Side by Side
The right crown depends on the situation. Below is a plain-language comparison of the most important differences for patients.
- Strength: zirconia is generally more fracture-resistant than the porcelain layer of a PFM crown [3]
- Appearance: modern zirconia can look very natural; PFM can match well but may show a gum-line dark edge later
- Tooth preparation: zirconia often allows a thinner reduction; PFM needs more space for both metal and porcelain
- Wear on opposing teeth: highly polished zirconia is gentle; rough zirconia or worn porcelain can wear opposing enamel [5]
- Allergy concerns: zirconia is metal-free; PFM contains metals that rarely cause sensitivity
- Repairability: chipped PFM porcelain can sometimes be patched in the mouth; zirconia usually cannot be repaired and is replaced
- Track record: PFM has a longer published clinical history; monolithic zirconia is newer but performing well in studies [3]
What to Know Before Getting a Crown
Before choosing a crown material, talk with your dentist about the tooth's location, your bite, and your goals. The best material for a back molar may not be the best for a front tooth.
Crown placement is typically for permanent teeth in adults. Children with severely damaged baby molars sometimes receive prefabricated stainless steel or zirconia crowns, but adult crown decisions follow different rules [2].
Who Is a Good Candidate?
Crowns are typically recommended when a tooth is too damaged for a filling but still has a healthy root. Common reasons include large fractures, deep decay, after a root canal, or to cover an implant.
- Heavy grinders or clenchers often do better with monolithic zirconia
- Patients seeking the most lifelike front tooth may consider high-translucency zirconia or, in some cases, all-ceramic alternatives
- Patients with a known metal allergy may prefer zirconia over PFM
- Patients with limited tooth structure may need an evaluation by a prosthodontist
How to Prepare
Most crown procedures need two visits, though some offices use same-day milling. Your dentist will review your medical history, take X-rays, and check your bite. If decay or infection is present, that is treated first.
- Tell your dentist about grinding, jaw pain, or sensitivity
- List all medications, especially those that cause dry mouth
- Ask whether your insurance covers zirconia, PFM, or both
- Plan for one to two appointments depending on the office workflow
Risks and Limitations to Discuss
Both crown materials carry trade-offs that are worth reviewing with your dentist before treatment. Some research suggests that opposing tooth wear can be a concern when zirconia surfaces are not properly polished after bite adjustment [5]. PFM crowns can develop porcelain chipping under heavy bite forces, though the 5-year rate reported in single-crown reviews is relatively low at around 3 percent [3].
Long-term studies suggest both materials perform well, but neither is risk-free. Knowing the trade-offs helps you and your dentist match the material to your specific tooth, bite, and esthetic goals.
- Zirconia: difficult to repair if chipped, often must be replaced
- Zirconia: roughened or unpolished surfaces may wear opposing enamel more than smooth surfaces [5]
- PFM: outer porcelain can chip, especially in patients who clench or grind
- PFM: gum recession over time can expose a thin dark line at the crown margin
- Both: small risk of bite changes, sensitivity, or the need for adjustment after placement
What to Expect During the Crown Process
Getting a crown typically involves shaping the tooth, taking an impression or digital scan, and bonding the final crown in place. Most patients are numb during the prep and feel pressure but not pain.
Steps may vary based on whether your dentist uses an outside lab or a same-day milling system. Same-day crowns are often zirconia or other all-ceramic materials, while traditional PFM crowns are usually made at a lab over one to two weeks.
Step-by-Step Visit Walkthrough
The general workflow is similar for zirconia and PFM, with small differences in tooth shaping and try-in.
- Numbing: local anesthetic is given so the procedure is comfortable
- Tooth shaping: the dentist removes a thin outer layer to make room for the crown
- Impression or scan: a mold or digital scan captures the tooth shape and bite
- Temporary crown: a temporary protects the tooth between visits if needed
- Lab fabrication: the lab mills zirconia or layers porcelain over a metal frame for PFM
- Try-in: the dentist checks fit, color, and bite, and adjusts as needed
- Cementation: the crown is bonded or cemented onto the tooth
After Your Crown Is Placed
Mild gum tenderness or bite sensitivity is common for a few days. Long-term care is similar to caring for a natural tooth: regular brushing, flossing around the gumline, and routine cleanings [2].
- Avoid very hard or sticky foods for the first 24 hours if cement needs to set fully
- Floss daily; pull the floss out sideways at the gumline if needed
- Wear a nightguard if you grind your teeth, to protect both the crown and opposing teeth
- Call your dentist if the bite feels high, pain lingers, or the crown feels loose
Cost Factors and Insurance
Crown costs typically range from $800 to $3,000 per tooth for both zirconia and PFM. Costs vary by location, provider, lab fees, and case complexity.
Dental insurance often covers a portion of medically necessary crowns, usually after a deductible and waiting period. Cosmetic upgrades, such as choosing high-esthetic zirconia for a tooth that does not show, may not be fully covered. Always confirm what your plan pays before treatment.
- Geographic location: urban areas often cost more than rural areas
- Lab fees: high-end esthetic labs charge more, especially for layered front-tooth crowns
- Specialist vs general dentist: prosthodontists may charge more for complex cases
- Additional needs: core buildups, root canals, or gum work add to the total
- Insurance: in-network providers and annual maximums affect what you pay
- Material grade: monolithic zirconia, layered zirconia, and PFM may be billed differently
When to See a Specialist
Most single-tooth crowns can be placed well by a general dentist. A prosthodontist is worth considering for complex restorative cases, multiple crowns, or when bite, esthetics, or prior failures make the case difficult [1].
Consider asking for a prosthodontic referral if your case involves more than one or two crowns, full-arch work, or implant-supported restorations. Prosthodontists complete three additional years of training after dental school focused on tooth replacement and complex restorations [1].
- Multiple failing crowns or repeated chipping
- Full-mouth or full-arch reconstruction
- Implant-supported crowns or bridges
- Severe wear from grinding (bruxism) with bite changes
- Front-tooth esthetics where shade and shape are critical
- Limited remaining tooth structure that may need a buildup or post
Find a Prosthodontist Near You
If your case is complex or you want a specialist's opinion before choosing zirconia or PFM, browse the prosthodontics page to find a credentialed prosthodontist in your area. A specialist consultation can clarify which crown material best fits your tooth, bite, and goals.
Search Prosthodontists in Your Area