Evidence map›Paper›PMID 34415434›Full record

Trial reportClinical oral investigations2022

Prospective clinical evaluation of chairside-fabricated zirconia-reinforced lithium silicate ceramic partial crowns-5-year results.

Sven Rinke, Tanja Zuck, Tim Hausdörfer, Andreas Leha, Torsten Wassmann, Dirk Ziebolz

Abstract readRandomized Controlled Trial
In one paragraph

Trial report in Clinical oral investigations, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed, 2 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

9 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Survival and Complications of Partial Coverage Restorations on Posterior Teeth-A Systematic Review and Meta-Analysis.Journal of esthetic and restorative dentistry : official publication of the American Academy of Esthetic Dentistry ... [et al.] · 2025
    Pooled it
  2. Pooled it
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  6. Survival of Partial Coverage Restorations on Posterior Teeth-A Scoping Review.Journal of esthetic and restorative dentistry : official publication of the American Academy of Esthetic Dentistry ... [et al.] · 2025
    Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Sven RinkeDepartment of Prosthodontics, University Medical Center, Robert-Koch-Str. 40, 37075, Goettingen, Germany. sven.rinke@med.uni-goettingen.de.ORCID http://orcid.org/0000-0003-3804-6410
Tanja ZuckDepartment of Prosthodontics, University Medical Center, Robert-Koch-Str. 40, 37075, Goettingen, Germany.
Tim HausdörferDepartment of Preventive Dentistry, Periodontology, and Cariology, University Medical Center, Goettingen, Germany.
Andreas LehaDepartment of Medical Statistics, University Medical Center, Goettingen, Germany.
Torsten WassmannDepartment of Prosthodontics, University Medical Center, Robert-Koch-Str. 40, 37075, Goettingen, Germany.
Dirk ZiebolzDepartment of Cariology, Endodontology and Periodontology, University Medical Center, Leipzig, Germany.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesA university-based randomized clinical study evaluated the 5-year performance of chairside-fabricated zirconia-reinforced lithium silicate (ZLS)-ceramic partial crowns. MATERIAL AND

methodsForty-five patients were restored with 61 chairside-fabricated ZLS-restorations (Cerec SW 4.2, Dentsply Sirona, Germany; Vita Suprinity, Vita Zahnfabrik, Germany). Deviating from the manufacturers' recommendations, restorations with reduced minimum material thicknesses (MMT) were fabricated: group 1, MMT = 0.5-0.74 mm (n = 31); group 2, MMT = 0.75-1.0 mm (n = 30). For luting, a self-adhesive cement (SAC) or a total-etch technique with a composite cement (TEC) was applied. Statistical evaluation was performed by time-to-event analysis (Kaplan-Meier). Possible covariates of the survival (SVR) and success rates (SCR), evaluated in a Cox regression model, were MMT, restoration position (premolar/molar), and cementation technique (SAC vs. TEC).

resultsForty patients (54 restorations, premolars, n = 23; molars, n = 31) participated in the 5-year follow-up. Five losses due to ceramic fractures occurred in group 1 (n = 28) (SVR: 83.0% [95% confidence interval (CI): 0.71-0.96]). Group 2 (n = 26) showed no losses (SVR: 100%). The success rate for partial crowns placed on premolars was 100% and 69% (95% CI: 0.54-0.84) for molar restorations. Recementation was required in 4 restorations with SAC (SCR: 86% [95% CI: 0.73-0.99]; SCR-DC: 100%). Restorations in group 2 showed a significantly reduced risk of material fracture hazard ratio (HR) = 0.09, p = 0.0292) compared with the restorations in group 1. Molar partial crowns showed an increased risk for a clinical intervention (HR = 5.26, p = 0.0222) compared to premolar restorations.

conclusionsMaterial thickness and position of the restoration are risk factors influencing the survival and success rate of ZLS-ceramic partial crowns. CLINICAL RELEVANCE: Observation of an MMT of at least 0.75-1.0 mm for ZLS-ceramics is essential to avoid material-related fractures. CLINICAL

trial registrationGerman Clinical Trails Register (trial number: DRKS00005611).

Indexed as

CrownsLithiumBicuspidCeramicsComputer-Aided DesignDental PorcelainDental Prosthesis DesignDental Restoration FailureHumansMaterials TestingProspective StudiesSilicatesZirconiumDental PorcelainLithiumSilicatesZirconiumzirconium oxideClinical studyHigh-strength glass–ceramicsPartial crownSuccess rateSurvival rate

Identifiers

PMID34415434
PMCPMC8816527

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.