Cochrane · intervention · CD009109
Single crowns versus conventional fillings for the restoration of root‐filled teeth
Sequeira‐Byron, P, Fedorowicz, Z, Carter, B, et al. · Cochrane Database of Systematic Reviews · 2015 · Cochrane Library
Full textEvery question was extracted from the full review (methods and results), not only its Summary of Findings table.
Questions
7
current version
GRADE rated
3
No studies
4
Included studies
1
as reported
No studies 4 · 57.1%Ungraded 0 · 0%Very low 3 · 42.9%Low 0 · 0%Moderate 0 · 0%High 0 · 0%
Ungraded means an effect was reported without a GRADE rating; it is not a gap. No studies means the review found nothing to answer the question. The six categories are a display order, not a score.
Review question
| Element | Planned (methods) | Found (results) |
|---|---|---|
| Population | Participants of any age or gender who had permanent teeth that had undergone endodontic treatment | 117 participants (54 male, 63 female), age 35 to 55 (mean 48) years; each provided a single root-filled premolar (Mannocci 2002); 104 teeth assessed at the final 3-year time point |
| Intervention | Single full coverage indirect crowns (e.g. metal, metal-ceramic and all-ceramic crowns) or other indirect partial restorations (e.g. inlays and onlays) | Full-coverage metal-ceramic crown over composite core with carbon fibre post (n=57) |
| Comparison | Any type of filling materials for direct restoration (e.g. amalgam and composite) | Direct adhesive composite restoration with carbon fibre post (n=60) |
| Outcomes | Catastrophic failure of the restored tooth/restoration leading directly to extraction; Non-catastrophic failure of the restoration requiring further treatment (i: failure of restoration; ii: post failure); Patient satisfaction and quality of life; Incidence or recurrence of caries; Periodontal health status; Costs | Catastrophic failure (SoF; GRADE very low; 0 events); Non-catastrophic failure of the restoration (SoF; RR 0.33; GRADE very low); Post failure (SoF; RR 1.96; GRADE very low); patient satisfaction, caries, periodontal health, costs not measured |
| Study designs | Randomised controlled trials (RCTs) or quasi-randomised controlled trials (parallel group, split-mouth, cluster, or randomised patient preference) | RCT, parallel group, 3-year duration (n=1) |
| Timing | Endpoints analysed at the last follow-up time point, up to 10 years after randomisation | 3 years |
Search date: 2015-03. Databases: Cochrane Oral Health Group's Trials Register; Cochrane Central Register of Controlled Trials (CENTRAL); MEDLINE via OVID; EMBASE via OVID; CINAHL via EBSCO; LILACS via BIREME
Questions and results
Show all 3 versionsSingle full-coverage metal-ceramic crown over composite core and post vs Direct adhesive composite restoration with post (conventional filling, no crown)
Population: People with a permanent tooth that has undergone endodontic (root canal) treatment
| Outcome | Effect | Evidence | Status / GRADE |
|---|---|---|---|
Catastrophic failure of the restored tooth or restoration leading directly to extraction 3 years | SoF 'Catastrophic failure of restoration': assumed risk (conventional filling) 0, corresponding risk (single crown) 0; no events in either group so a relative effect was not estimable; 117 participants (1 study); GRADE… 0 vs 0 | 1 study · 117 participants | Very low Downgraded: risk of bias, imprecision, indirectness |
Patient satisfaction and quality of life (any validated instrument) | This outcome was not reported nor measured by the study. The abstract confirms no evidence was available for any secondary outcome. | NR | No studies |
Periodontal health status | No data were reported nor measured by the study. The abstract confirms no evidence was available for any secondary outcome. | NR | No studies |
Non-catastrophic failure of the post 3 years | RR 1.96 [0.18, 21.01] 19 per 1000 vs 37 per 1000 | 1 study · 117 participants | Very low Downgraded: risk of bias, imprecision, indirectness |
Incidence or recurrence of caries (assessed clinically or by radiographs) | No data were reported nor measured by the study. The abstract confirms no evidence was available for any secondary outcome. | NR | No studies |
Costs for the use of different treatment interventions | No data were reported nor measured by the study. The abstract confirms no evidence was available for any secondary outcome. | NR | No studies |
Non-catastrophic failure of the restoration (requiring further treatment) 3 years | RR 0.33 [0.04, 3.05] 57 per 1000 vs 19 per 1000 | 1 study · 117 participants | Very low Downgraded: risk of bias, imprecision, indirectness |