Prefabricated zirconia crowns (e.g., NuSmile, Zirkiz, Kinder Krown) vs Other crowns/restorations (stainless steel crowns, pre-veneered SSC, resin composite strip crowns, glass-fiber composite crowns): Crown retention
Zirconia crowns showed no significant difference in crown retention versus other restorations at 6 months (RR 1.02, 95% CI 0.94 to 1.11; 3 studies; not GRADE-rated).
What each review found
Current versions only| Finding | Effect | Studies | GRADE certainty |
|---|---|---|---|
Prefabricated zirconia crowns (e.g., NuSmile, Zirkiz, Kinder Krown) vs Other crowns/restorations (stainless steel crowns, pre-veneered SSC, resin composite strip crowns, glass-fiber composite crowns) Crown retention · Children with primary (deciduous) teeth requiring full-coverage crown restoration · 6 months, Pediatric dental clinical settings Zirconia crowns showed no significant difference in crown retention versus other restorations at 6 months (RR 1.02, 95% CI 0.94 to 1.11; 3 studies; not GRADE-rated). Zirconia Crowns for Primary Teeth: A Systematic Review and Meta-Analyses. (2022) All outcomes | RR 1.02 [0.94, 1.11] | 3 studies · 201 participants | GRADE not reported |
Prefabricated zirconia crowns (e.g., NuSmile, Zirkiz, Kinder Krown) vs Other crowns/restorations (stainless steel crowns, pre-veneered SSC, resin composite strip crowns, glass-fiber composite crowns) Crown retention · Children with primary (deciduous) teeth requiring full-coverage crown restoration · 12 months, Pediatric dental clinical settings Zirconia crowns showed no significant difference in crown retention versus other restorations at 12 months (RR 1.00, 95% CI 0.94 to 1.05; 3 studies; not GRADE-rated). Zirconia Crowns for Primary Teeth: A Systematic Review and Meta-Analyses. (2022) All outcomes | RR 1.00 [0.94, 1.05] | 3 studies · 156 participants | GRADE not reported |
Findings are shown side by side, never pooled across reviews.
The reviews
| Review | Searched up to | Included studies | AMSTAR 2 |
|---|---|---|---|
| Zirconia Crowns for Primary Teeth: A Systematic Review and Meta-Analyses. 2022 All outcomes | Last search run 5 January 2022; no date or language restriction applied in the searches | 61 | Critically Low / Critically Low |
Studies behind the findings
The primary studies the full-text reviews tie to this outcome. Reviews with headline outcomes only do not list them here.
- Evaluation of Clinical Success, Parental and Child Satisfaction of Stainless Steel Crowns and Zirconia Crowns in Primary Molars. · 2020 · included by 1 of these review
- Talekar et al. 2021 · included by 1 of these review
- Taran et al. 2018 · included by 1 of these review
- Walia et al. 2014 · included by 1 of these review
How reviews are matched to this question
Reviews word the same question differently. Four decision models (TypeSafe's Jev, Liquid AI's d1-ultra, SubQ Snap and Baseten's Elephant) judged each wording of the population, intervention, comparator and outcome against the others; two wordings count as the same when at least three of them agree and none clearly disagrees, and findings count as this question only when all four elements match. Timing, setting and subgroup never split a question: they are shown on each finding.