Prosthetics · Comparison
Zirconia or metal-ceramic crown: what the data show
The expectation is that the newer material wins. The published data do not say that, and the difference between a crown on a tooth and a crown on an implant matters more than the material itself.
The short answer
For tooth-supported single crowns, metal-ceramic shows 5-year survival of 94.7% against 92.1% for densely sintered zirconia, with significantly more veneering-ceramic fractures and loss of retention; the review authors concluded zirconia-based single crowns should not be a primary option. On implants the two are close: 97.6% zirconia versus 98.3% metal-ceramic.
Key points
- For tooth-supported crowns, densely sintered zirconia shows 5-year survival of 92.1% (95% CI 82.8–95.6%) against 94.7% for metal-ceramic, with significantly more veneering-ceramic fractures and loss of retention.
- The authors of that review concluded that zirconia-based single crowns should not be considered a primary option on teeth because of the technical complications.
- For implant-supported crowns the picture differs: 97.6% five-year survival for zirconia against 98.3% for metal-ceramic, with more material fractures (2.1% versus 0.2%) but fewer aesthetic complications.
- Monolithic zirconia shows 3-year survival of 98.9% for multi-unit implant prostheses with significantly less chipping, but long-term tooth-supported monolithic data beyond about two years are not yet available.
- Lithium disilicate (e.max) crowns show 5-year survival of 96.6% across 14,097 tooth-supported crowns in a systematic review of 67 studies, statistically similar to metal-ceramic.
Why expectation and evidence diverge
When patients weigh a zirconia or metal-ceramic crown, the usual assumption is that the newer material is also the more durable one. The published data do not support that assumption uniformly across situations.
Two separate questions are frequently merged: how the material behaves on a natural tooth, and how it behaves on an implant. The answers differ and cannot be compressed into one sentence.
Below we keep the two apart and attach the scope to every figure — number of studies, number of crowns, follow-up period — because without it the numbers mean nothing specific.
Zirconia or metal-ceramic crown: what the two materials are
A metal-ceramic crown has a metal substructure onto which ceramic is fired. The metal provides strength and predictable retention; the ceramic provides the appearance. Its main technical weakness is that the veneering layer can chip, and where the gum is thin the margin of the metal substructure can show as a darker line.
A zirconia crown has a zirconium dioxide substructure. In the classic version, veneering ceramic is fired onto it as well. In the monolithic version the whole crown is zirconia with no veneer, precisely because the veneer is the weak point.
Lithium disilicate, known as e.max, is a glass ceramic with no metal substructure, used mainly for single crowns and for veneers, where optical properties lead. There is more on construction types on our dental crowns page.
The data for crowns on natural teeth
On teeth, densely sintered zirconia shows 5-year survival of 92.1% (95% CI 82.8–95.6%) against 94.7% for metal-ceramic, with significantly more fractures of the veneering ceramic and significantly more loss of retention.
The review authors state their conclusion plainly: zirconia-based single crowns should not be considered a primary option on teeth, because of those technical complications. That does not make the material unsuitable; it means the result depends heavily on execution and on the indication.
For metal-ceramic, a systematic review of 67 studies covering 4,663 tooth-supported crowns gives 94.7% five-year survival (95% CI 94.1–96.9%). Lithium disilicate crowns give 96.6% (95% CI 94.9–96.7%) across 14,097 tooth-supported crowns in a systematic review of 67 studies, statistically similar to metal-ceramic. A prospective study of 104 e.max crowns reports 97.4% at five years and 94.8% at eight years.
The data for crowns on implants
Here the direction changes. On implants, zirconia crowns show 97.6% five-year survival against 98.3% for metal-ceramic. The gap is small and the complication profile differs: with zirconia, material fractures are more frequent (2.1% versus 0.2%), but aesthetic complications are less frequent.
For implant-supported metal-ceramic crowns, the review of 4,363 crowns gives 98.3% (95% CI 96.8–99.1%), with 86.7% remaining free of any complication over the follow-up period.
The practical meaning is this: on an implant, a zirconia crown rests on solid evidence, while on a natural tooth the same material carries a higher risk of technical complications. The same question about two different cases therefore has two different answers.
Monolithic zirconia: what is known and what is not yet
A monolithic crown is milled from a single block of zirconia with no veneering ceramic. The logic is direct: if the veneer is what chips, remove the veneer.
The data so far are encouraging. For multi-unit prostheses on implants, monolithic zirconia shows 3-year survival of 98.9% with significantly less chipping than veneered versions.
The limitation has to be stated as well: long-term data for monolithic crowns on natural teeth beyond about two years of follow-up are not yet available. That is not an argument against the material. It is a reason to choose it knowing what has been demonstrated and what is still accumulating.
Price is not the deciding factor
A metal-ceramic crown is EUR 250 here, a zirconia crown is EUR 250, and an e.max crown is EUR 325. In other words, there is no price difference between the two main options, and the third costs EUR 75 more.
That matters, because in many conversations the choice of material collapses into a question of budget. Here it cannot. At the same price the decision is made on the indication, the position of the tooth, the chewing load, the thickness of the gum, and whether the crown sits on a tooth or on an implant.
The full price list is published, including a temporary crown at EUR 40, removal of an old crown at EUR 20, and zirconia crowns on implants at EUR 390 on Neodent and EUR 450 on Straumann.
How the choice is made in practice
Position is the first factor. On visible front teeth optical properties weigh more, and glass ceramic is often preferred. On chewing teeth under high load, resistance to fracture weighs more.
Second, the condition of the supporting tooth: how much structure remains, whether the root has been treated, whether there is a post-and-core. Third, the antagonist — what bites against the crown, a natural tooth or another construction. Fourth, bruxism, which changes the whole calculation and usually calls for a night guard.
Fifth, gum thickness and the smile line. With a thin gum, the metal substructure can outline itself over time, which is one of the common reasons an old crown is replaced. These factors are assessed at an examination rather than from a description. The first conversation commits you to nothing.
What happens when a crown is compromised
With metal-ceramic, the most frequent problem is chipping of the veneering ceramic. A small defect can sometimes be polished or repaired in the mouth; a large one means a new crown.
With veneered zirconia the problem is similar, while the monolithic version has no veneer, so that complication does not arise. Loss of retention, meaning the crown comes off its cement, is a separate problem and is reported more often with zirconia crowns on teeth in the review cited above.
Separately from the material there is what happens underneath: caries at the margin, a need for root canal treatment, root fracture. Regular review is therefore not a formality — it finds these things while the decision is still a small one.
| Material | Survival with scope | Aesthetics | How it fails | Indication | Price here |
|---|---|---|---|---|---|
| Metal-ceramic | 94.7% at 5 years on teeth (67 studies, 4,663 crowns); 98.3% on implants, 86.7% free of any complication | Good, but with a thin gum the metal margin can outline itself | Chipping of the veneering ceramic | Broad indication, including posterior teeth and long-span work | EUR 250 |
| Veneered zirconia | 92.1% at 5 years on teeth (95% CI 82.8–95.6%); 97.6% on implants | No metal substructure, more predictable with a thin gum | Veneering-ceramic fracture and loss of retention; on implants material fracture 2.1% versus 0.2% | Review authors advise against it as a primary option on teeth; on implants the evidence base is solid | EUR 250 |
| Monolithic zirconia | 98.9% at 3 years for multi-unit implant prostheses with significantly less chipping; long-term tooth-supported data beyond about 2 years not yet available | Less translucency than glass ceramic, acceptable on posterior teeth | No veneering ceramic to chip | Posterior teeth, limited space, high chewing load | EUR 250 |
| Lithium disilicate (e.max) | 96.6% at 5 years on teeth (67 studies, 14,097 crowns), statistically similar to metal-ceramic; 97.4% at 5 and 94.8% at 8 years across 104 crowns | Marked translucency, generally preferred on visible teeth | Fracture of the material itself under high load | Single anterior teeth and premolars, aesthetic cases | EUR 325 |
The Club awaits you
Prosthetic treatment is led by Dr Damyan Karadjov, and your plan is issued in writing with the material, the stages and the cost. Call +359 896 121 314.
What the evidence shows
96.6%
5-year survival of lithium disilicate ceramic crowns
Systematic review of 67 studies covering 14,097 tooth-supported single crowns: 96.6% (95% CI 94.9–96.7%) — statistically similar to metal-ceramic at 94.7%.
Sources
Sailer I, et al. All-ceramic or metal-ceramic tooth-supported fixed dental prostheses? Part I: single crowns. Dent Mater 2015;31(6):603–623. (opens in a new window) · Pieger S, Salman A, Bidra AS. Clinical outcomes of lithium disilicate single crowns and partial fixed dental prostheses: a systematic review. J Prosthet Dent 2014;112(1):22–30. (opens in a new window)
Frequently asked questions
Frequently asked questions
Not as a rule, but according to the case. On teeth the data give 92.1% against 94.7% at five years, with more technical complications for zirconia, which is why the review authors do not recommend it as a primary option there. On implants the difference is small, 97.6% against 98.3%, and the choice is made on other grounds.
For appearance it does: without a metal substructure the risk of a darker line at a thin gum margin disappears, which is a common reason old crowns are replaced. For durability, the absence of metal is not automatically an advantage, as the tooth-supported data show. The two questions are judged separately.
In bruxism the load is higher and more sustained, which increases the risk of veneering ceramic chipping. In those cases a monolithic option is discussed more often, and a night guard almost always. The choice follows an assessment of wear, occlusal contacts and the opposing teeth, not the material alone.
The EUR 75 difference reflects the material and the laboratory work, not higher survival. Across 14,097 tooth-supported crowns, lithium disilicate gives 96.6% at five years, statistically similar to 94.7% for metal-ceramic. Its advantage is optical and matters chiefly on visible teeth.
No single figure applies to every case. The published data describe five-year and eight-year follow-up periods by material, not a shelf life. Longevity depends on the condition of the supporting tooth, on hygiene, on loading, and on regular review at which small problems are found early.
It can, but first we assess why the old one was compromised. Removal of an old crown is EUR 20 here and a temporary crown EUR 40. If the cause is caries at the margin, a fracture or a problem in the root, treatment starts there, and choosing the new material is the next step rather than the first.
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