title: The effect of bonding system and composite type on adaptation of different C-factor restorations.
abstract: This study evaluated the effect of two adhesive systems and four resin-based composites on the marginal sealing and cavity wall adaptation of restorations with different C-factors. Cylindrical cavities, 1 mm deep and 3 mm in diameter (C-factor=2.3) or 2 mm in diameter (C-factor=3), were prepared on superficial bovine dentin surfaces. The teeth were restored with Clearfil SE Bond or Single Bond adhesive system followed by hybrid (Photo Clearfil Bright or Z100) or flowable (Filtek Flow or Estelite LV) resin composite. After thermocycling, a dye penetration test was carried out to evaluate the degree of marginal leakage and cavity-wall gap formation. Cavity-wall gap formation increased when the C-factor increased from 2.3 to 3, except for Estelite LV resin composite. In terms of marginal sealing, Clearfil SE Bond showed better performance than Single Bond. When using Clearfil SE Bond, flowable composites improved resin composite adaptation to the cavity wall compared with hybrid composites.
authors.affiliation: Cariology and Operative Dentistry, Department of Restorative Sciences, Graduate School, Tokyo Medical and Dental University, Japan.
authors.forename: Nipaporn
authors.initials: N
authors.lastname: Wattanawongpitak
authors.forename: Takako
authors.initials: T
authors.lastname: Yoshikawa
authors.forename: Michael F
authors.initials: MF
authors.lastname: Burrow
authors.forename: Junji
authors.initials: J
authors.lastname: Tagami
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D000269:Adhesives / Q000737:chemistry*; D000818:Animals; D002417:Cattle; D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding / Q000379:methods*; D018772:Dental Marginal Adaptation; D011140:Polyurethanes / Q000737:chemistry*
chemical_list: D000180:Acrylic Resins; D000269:Adhesives; C029012:Composite Dental Resin; D003188:Composite Resins; D011140:Polyurethanes