In vivo interfacial adaptation of class II resin composite restorations with and without a flowable resin composite liner

• Published in: Clinical oral investigations 2005-06, Vol.9 (2), p.77-83
• Main Authors: Lindberg, Anders, van Dijken, J W V, Hörstedt, P
• Format: Article
• Language: English
• Subjects: Adolescent; Child; Composite Resins - chemistry; Dental Cavity Lining; Dental Cavity Preparation - classification; Dental Enamel - ultrastructure; Dental Marginal Adaptation; Dental Restoration, Permanent - classification; Dentin - ultrastructure; Dentistry; Humans; Lighting - instrumentation; Microscopy, Electron, Scanning; Resin Cements - chemistry; Surface Properties; Tooth Cervix - ultrastructure; Viscosity
• ISSN: 1432-6981; 1436-3771; 1436-3771
• DOI: 10.1007/s00784-005-0311-x

The aim of this study was to evaluate in vivo the interfacial adaptation of class II resin composite restorations with and without a flowable liner. In 24 premolars scheduled to be extracted after 1 month, 48 box-shaped, enamel-bordered class II cavities were prepared and restored with a flowable liner (FRC, Tetric Flow/Tetric Ceram/Syntac Single-Component) or without (TRC), cured with three different curing modes: soft start and 500- or 700-mW/cm2 continuous irradiation. Interfacial adaptation was evaluated by quantitative scanning electron microscopic analysis using replica method. Gap-free adaptation in the cervical enamel (CE) was observed for FRC and TRC in 96.2 and 90.2%, for the dentin (D) in 63.6 and 64.9%, and for occlusal enamel (OE) in 99.7 and 99.5%, respectively. The difference between the two restorations was not statistically significant (ns). Significant better adaptation was observed for OE than CE and D (p