The effect of two composite placement techniques on fracture resistance of MOD restorations with various resin composites

• Published in: Journal of dentistry Vol. 101; p. 103348
• Main Authors: Bonilla, E.D., Hayashi, M., Pameijer, C.H., Le, N.V., Morrow, B.R., Garcia-Godoy, F.
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01.10.2020; Elsevier Limited
• Subjects: Bond strength; Bulk-fill technique; Centripetal incremental technique; Class II restorations; Composite materials; Composite Resins; Curing; Dental caries; Dental Caries - therapy; Dental Restoration, Permanent; Dentin; Dentistry; Enamel; Fracture resistance; Fracture toughness; Humans; Light; Materials Testing; Molar; Molars; Placement; Polymer matrix composites; Polymerization; Resin composite; Resins; Statistical analysis; Teeth; Variance analysis; United States > US; Resin composite; Centripetal incremental technique; Bulk-fill technique; Fracture resistance; Class II restorations
• ISSN: 0300-5712; 1879-176X
• DOI: 10.1016/j.jdent.2020.103348

The aim of this in vitro study was to compare the effect of two restorative placement techniques, centripetal incremental technique (CIT) and bulk-fill technique (BT) on the fracture resistance of Class II MOD restorations with various resin composites in molar teeth. Fifty-six extracted, caries free third molars were prepared with MOD preparations and restored with resin composites. The specimens were divided into two groups by placement technique, centripetal incremental technique (CIT) and bulk-fill technique (BT). Each group was subdivided into four groups according to resin composite: hybrid (Aelite LS), nano-hybrid (Virtuoso Universal), bulk fill (Filtek One Bulk Fill) and the micro-hybrid (Herculite XRV) as the control. Two-way analysis of variance test (ANOVA) followed by the multiple comparison procedure, Student-Newman-Keuls Method showed no a statistically significant difference between placement techniques and fracture resistance of Class II resin composite restorations (P > 0.05). Herculite XRV resisted a significantly higher load before fracture than the other three materials at a 0.05 level of significance, while Virtuoso Universal scored the lowest load. There was no significant effect of the two placement techniques on the fracture resistance of Class II resin composite restorations Resin composite restorations in Class II MODs using a simplified bulk fill placement technique showed no significant difference in fracture resistance with the centripetal technique in molar teeth.