Dental Literature Watch · Systematic review · Prosthodontics
Zirconia restorations hold up, except conventional cantilever bridges
TL;DR
- Zirconia single crowns survive well: pooled survival 92.9-98.7% up to 10 years.
- Conventional cantilever FPDs are the exception: survival 50.0-52.6% over 9 to 13 years, success 12.5-22.6%, and the authors say they should be done with caution.
- Resin-bonded FPDs did best: 97.4% survival over 10 to 15 years, with the lowest complication rates (3.3% biological, 8.0% mechanical).
- “Survived” is not “trouble-free”. Single crowns had a 53.9% mechanical complication rate at 10 years, mostly chipping and debonding.
- Airborne-particle abrasion followed by MDP primer gave favourable short-term results: 98.6% survival and 97.7% success for single crowns.
- GRADE certainty was very low, despite low to moderate risk of bias in the included studies.
The study
| Element | Detail |
|---|---|
| Design | Systematic review and meta-analysis; PubMed, Cochrane, Embase and Web of Science searched to 1 January 2026 |
| Population | 66 clinical studies (2008-2025) of zirconia restorations on natural teeth with at least 1 year of follow-up |
| Intervention | Zirconia single crowns (SCs), fixed dental prostheses (FPDs), resin-bonded FPDs, conventional cantilever FPDs and inlay-retained FPDs |
| Outcomes | Survival, success, biological and mechanical complications |
| Result: survival | SCs 92.9-98.7% to 10 y · FPDs 77.6% at 10-13 y · resin-bonded FPDs 97.4% at 10-15 y · cantilever FPDs 50.0-52.6% at 9-13 y · inlay-retained FPDs 89.0% at 10 y |
| Result: complications | Biological / mechanical: SCs 12.1% / 53.9% at 10 y · FPDs 19.4% / 46.7% · cantilever FPDs 50.0% / 37.5% at 9 y · resin-bonded FPDs 3.3% / 8.0% |
| Certainty | Low to moderate risk of bias; GRADE very low |
💎 Insight — what this means chairside
Pick the design, not just the material
Zirconia is one material but five different outcomes.
The cantilever bridge is where it fails, and the resin-bonded bridge is where it excels.
Zirconia is one material but five different outcomes.
The cantilever bridge is where it fails, and the resin-bonded bridge is where it excels.
Counsel on complications, not just survival
A crown can stay in the mouth for 10 years and still need repair: mechanical complications were 53.9% for single crowns.
The commonest were chipping and debonding, and the commonest biological problems were secondary caries and pulpitis or apical periodontitis.
A crown can stay in the mouth for 10 years and still need repair: mechanical complications were 53.9% for single crowns.
The commonest were chipping and debonding, and the commonest biological problems were secondary caries and pulpitis or apical periodontitis.
Bonding protocol matters
Airborne-particle abrasion plus MDP-containing primer was the protocol with favourable short-term outcomes.
It is the zirconia workflow, distinct from the etch-and-silane routine used for glass ceramics.
Airborne-particle abrasion plus MDP-containing primer was the protocol with favourable short-term outcomes.
It is the zirconia workflow, distinct from the etch-and-silane routine used for glass ceramics.
⚠️ The catch
Written from the abstract only
The full text is paywalled, so this page reports the abstract's pooled figures and nothing more.
It cannot tell you which studies sat behind each number, how many patients each pooled estimate covers, or what “success” required.
The full text is paywalled, so this page reports the abstract's pooled figures and nothing more.
It cannot tell you which studies sat behind each number, how many patients each pooled estimate covers, or what “success” required.
GRADE certainty is very low
The authors rate the evidence very low in certainty despite low to moderate risk of bias.
Treat the pooled percentages as an ordering of designs, not as precise forecasts.
The authors rate the evidence very low in certainty despite low to moderate risk of bias.
Treat the pooled percentages as an ordering of designs, not as precise forecasts.
The numbers are heterogeneous
Follow-up spans 3 to 15 years across designs, and some estimates are single figures where others are ranges.
Inlay-retained FPD complications, for example, are reported at 3 years, so they are not comparable with the 10-year crown figures.
Follow-up spans 3 to 15 years across designs, and some estimates are single figures where others are ranges.
Inlay-retained FPD complications, for example, are reported at 3 years, so they are not comparable with the 10-year crown figures.
⚡ Bottom line
- Single crown → zirconia is a sound choice for survival, so plan for the chance of chipping or debonding and tell the patient.
- Replacing one tooth with a conventional cantilever → pooled survival of about 50% at 9 to 13 years; avoid it or consent very carefully.
- Small space, sound adjacent teeth → a resin-bonded zirconia FPD had the best long-term numbers and the fewest complications.
- Bonding zirconia → sandblast and use an MDP-containing primer.
- Tempted to quote a single figure to a patient → remember the evidence is very low certainty and this page is from the abstract.
🧪 Questions
Tap an answer — instant grade, deciding line, and the trap.
A colleague plans to replace a single missing tooth with a zirconia bridge and asks which design the pooled long-term data favour on survival and complications combined. Which design should you name?
Resin-bonded FPDs had pooled survival of 97.4% over 10 to 15 years and the lowest complication rates (3.3% biological, 8.0% mechanical). Conventional cantilever FPDs had 50.0-52.6% survival and are the design the authors say needs caution. Inlay-retained FPDs are the conservative neighbour but reached 89.0% at 10 years, with complications reported at only 3 years. Conventional FPDs had 77.6% over 10 to 13 years. Trap: the cantilever, which feels conservative because it needs one abutment.
A patient asks what to expect from a zirconia single crown after 10 years. Which statement matches the pooled data?
Single crowns showed 92.9-98.7% survival to 10 years but a 53.9% mechanical complication rate, with chipping and debonding the commonest. The first option is the trap: 12.1% is the biological rate and survival is real, but it ignores the mechanical figure. About half lost is the cantilever FPD result (50.0-52.6%). Three-quarters is the multi-unit FPD figure (77.6%). Trap: quoting survival alone and calling the crown trouble-free.
Which luting protocol did this review associate with favourable short-term outcomes for zirconia restorations?
Airborne-particle abrasion plus MDP gave pooled survival and success of 98.6% and 97.7% for single crowns, and 98.1% and 70.1% for inlay-retained FPDs. Hydrofluoric acid plus silane is the glass-ceramic protocol and the trap for anyone who bonds all ceramics alike; it is not the protocol the review credits. Silane alone and phosphoric acid with unfilled resin are likewise not the conditioning the review reports for zirconia. Kill: only APA plus MDP appears in the conclusions.