| Title | Flowable materials as an intermediate layer could improve the marginal and internal adaptation of composite restorations in Class-V-cavities. | | Author(s) | Li Q, Jepsen S, Albers HK, Eberhard J | | Institution | Department of Operative Dentistry and Periodontology, University Hospital Schleswig-Holstein, Arnold-Heller-Str. 16, Campus Kiel 24105, Germany. | | Source | Dent Mater 2006 Mar; 22(3):250-7. | | MeSH | Compomers
Composite Resins
Dental Cavity Preparation
Dental Cementum
Dental Enamel
Dental Materials
Dental Restoration, Permanent
Dentin
Dentin-Bonding Agents
Humans
Marginal Adaptation (Dentistry)
Materials Testing
Methacrylates
Microscopy, Electron, Scanning
Polymethacrylic Acids
Rheology
Stress, Mechanical
Surface Properties
Temperature
Viscosity
| | Abstract | OBJECTIVES: The purpose of this in vitro study was to evaluate the marginal and internal adaptation of restorative systems in combination with flowable materials as an intermediate layer in Class-V-cavities.
METHODS: Thirty Class-V-cavities with occlusal margins in enamel and gingival margins in dentin/cementum were prepared and randomly assigned to five groups. The following five restorative systems were used: compomer, composite E, flowable compomer/composite E, composite RF and flowable composite/composite RF. The flowable materials were added between the restorative composites and the cervical margins of the cavities. Marginal and internal adaptation were quantitatively evaluated before and after thermal (2,500 times between 5 and 55 degrees C) and mechanical load cycling (25,000 times 100 N) using standard SEM procedures. Statistical analysis was performed using the Kruskal-Wallis and Mann-Whitney U-Test. The morphology of the internal restorative interfaces was also evaluated.
RESULTS: The present study revealed that the best marginal adaptation in dentin was attained with the compomer restoration (95.8% perfect margin). The marginal adaptation of composite restorative systems was improved by the use of a flowable compomer (45.5% vs. 68.2% perfect margin in dentin) or a flowable composite (46.7% vs. 80.7% perfect margin in dentin, p<0.05) as an intermediate layer. No differences were observed between the used materials for the parameter internal adaptation.
SIGNIFICANCE: In Class-V-cavities compomers showed the best marginal adaptation and the marginal adaptation of composite fillings could be improved by the use of flowable materials as an intermediate layer. | | Language | eng | | Pub Type(s) | Journal Article
Randomized Controlled Trial
| | PubMed ID | 16084584 |
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