Secondary Caries Adjacent to Bulk or Incrementally Filled Composites Placed after Selective Excavation In Vitro
Open Access
- 16 February 2021
- Vol. 14 (4), 939
- https://doi.org/10.3390/ma14040939
Abstract
Objectives: selective caries excavation (SE) is recommended for deep carious lesions. Bulk fill composites (BF) may be considered to restore SE-cavities. We compared the susceptibility for secondary caries adjacent to BF versus incrementally filled composites (IF) in SE and non-selectively excavated teeth (NS) in vitro. Methods: in 72 extracted human premolars, artificial caries lesions were induced on pulpo-axial walls of standardized cavities. The lesions were left (SE) or removed (NS), and teeth were restored using two BF, GrandioSO x-tra/Voco (BF-Gra) and SDR/Dentsply (BF-SDR), and an IF, GrandioSO/Voco (IF-Gra) (n = 12/group for SE and NS). After thermo-mechanical cycling (5–55 °C, 8 days), teeth were submitted to a continuous-culture Lactobacillus rhamnosus biofilm model with cyclic loading for 10 days. Mineral loss (ΔZ) of enamel surface lesions (ESL), dentin surface lesions (DSL), and dentin wall lesions (DWL) was analyzed using transversal microradiography. Results: ΔZ was the highest in DSL, followed by ESL, and it was significantly lower in DWL. There were no significant differences in ΔZ between groups in DSL, ESL, and DWL (p > 0.05). Regardless of lesion location, ΔZ did not differ between SE and NS (p > 0.05). Conclusions: BF and IF both showed low risks for DWL (i.e., true secondary caries) after SE in vitro, and surface lesion risk was also not significantly different between materials. SE did not increase secondary caries risk as compared with NS. Clinical Significance: the risk of secondary caries was low after selective excavation in this study, regardless of whether bulk or incrementally filled composites were usedFunding Information
- VOCO (-)
This publication has 35 references indexed in Scilit:
- Directly Placed Restorative MaterialsJournal of Dental Research, 2016
- Cyclic mechanical loading promotes bacterial penetration along composite restoration marginal gapsDental Materials, 2015
- In vitro Induction of Residual Caries Lesions in Dentin: Comparative Mineral Loss and Nano-Hardness AnalysisCaries Research, 2015
- Marginal integrity and secondary caries of selectively excavated teeth in vitroJournal of Dentistry, 2014
- Hydrodynamic Flow through Loading and in vitro Secondary Caries DevelopmentJournal of Dental Research, 2013
- Longevity of posterior composite restorations: Not only a matter of materialsDental Materials, 2012
- Does Incomplete Caries Removal Reduce Strength of Restored Teeth?Journal of Dental Research, 2010
- Comparing two quantitative methods for studying remineralization of artificial cariesJournal of Dentistry, 2010
- The Longevity of Direct and Indirect Posterior Restorations is Uncertain and may be Affected by a Number of Dentist-, Patient-, and Material-Related FactorsJournal of Evidence-Based Dental Practice, 2010
- A comparison of human dental plaque microcosm biofilms grown in an undefined medium and a chemically defined artificial salivaArchives of Oral Biology, 2001