Effect of Stress-decreasing Resin Thickness as an Intermediate Layer on Fracture Resistance of Class II Composite Restoration: An In Vitro Study
Arwin Leonardy, Trimurni Abidin, Dennis Dennis
Class II restoration, Fracture resistance, Intermediate layer thickness, Stress-decreasing resin
Citation Information :
Leonardy A, Abidin T, Dennis D. Effect of Stress-decreasing Resin Thickness as an Intermediate Layer on Fracture Resistance of Class II Composite Restoration: An In Vitro Study. World J Dent 2020; 11 (2):91-94.
Aim: The present study aims to investigate the effect of stress-decreasing resin (SDR) thickness as an intermediate layer in class II restoration. Materials and methods: Forty human maxillary premolar teeth were obtained and divided into four groups: G1, G2, G3, and G4. G1 to G3 were restored using SDR as an intermediate layer and overlayed with packable composite, and G4 was restored only using packable composite. All teeth were stored in the saline solution for 24 hours and subjected to 250 thermal cycles. The fracture strength of the teeth was tested in a universal testing machine. Results: No statistically significant effect was observed on the fracture resistance of class II restoration restored using different SDR thickness as intermediate layer (p < 0.05). A 4-mm SDR thickness group showed the highest fracture resistance among other groups. Conclusion: Using SDR thickness as the intermediate layer will affect the fracture resistance of class II restoration, but it is not statistically significant. A 4-mm SDR thickness showed good result as an intermediate layer in a restoration. Clinical significance: Stress-decreasing resin used as an intermediate layer can increase fracture resistance in class II composite restoration.
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