TY - JOUR
T1 - Bulk-Fill Resin Composites
T2 - Polymerization Contraction, Depth of Cure, and Gap Formation
AU - Benetti, Ana Raquel
AU - Havndrup-Pedersen, Cæcilie
AU - Honoré, Daniel
AU - Pedersen, Maiken K
AU - Pallesen, Ulla
PY - 2015/3
Y1 - 2015/3
N2 - The bulk-filling of deep, wide dental cavities is faster and easier than traditional incremental restoration. However, the extent of cure at the bottom of the restoration should be carefully examined in combination with the polymerization contraction and gap formation that occur during the restorative procedure. The aim of this study, therefore, was to compare the depth of cure, polymerization contraction, and gap formation in bulk-fill resin composites with those of a conventional resin composite. To achieve this, the depth of cure was assessed in accordance with the International Organization for Standardization 4049 standard, and the polymerization contraction was determined using the bonded-disc method. The gap formation was measured at the dentin margin of Class II cavities. Five bulk-fill resin composites were investigated: Two high-viscosity (Tetric EvoCeram Bulk Fill, SonicFill) and three low-viscosity (x- Tra base, Venus Bulk Fill, SDR) materials. Compared with the conventional resin composite, the high-viscosity bulk-fill materials exhibited only a small increase (but significant for Tetric EvoCeram Bulk Fill) in depth of cure and polymerization contraction, whereas the low-viscosity bulk-fill materials produced a significantly larger depth of cure and polymerization contraction. Although most of the bulk-fill materials exhibited a gap formation similar to that of the conventional resin composite, two of the low-viscosity bulkfill resin composites, x- Tra base and Venus Bulk Fill, produced larger gaps.
AB - The bulk-filling of deep, wide dental cavities is faster and easier than traditional incremental restoration. However, the extent of cure at the bottom of the restoration should be carefully examined in combination with the polymerization contraction and gap formation that occur during the restorative procedure. The aim of this study, therefore, was to compare the depth of cure, polymerization contraction, and gap formation in bulk-fill resin composites with those of a conventional resin composite. To achieve this, the depth of cure was assessed in accordance with the International Organization for Standardization 4049 standard, and the polymerization contraction was determined using the bonded-disc method. The gap formation was measured at the dentin margin of Class II cavities. Five bulk-fill resin composites were investigated: Two high-viscosity (Tetric EvoCeram Bulk Fill, SonicFill) and three low-viscosity (x- Tra base, Venus Bulk Fill, SDR) materials. Compared with the conventional resin composite, the high-viscosity bulk-fill materials exhibited only a small increase (but significant for Tetric EvoCeram Bulk Fill) in depth of cure and polymerization contraction, whereas the low-viscosity bulk-fill materials produced a significantly larger depth of cure and polymerization contraction. Although most of the bulk-fill materials exhibited a gap formation similar to that of the conventional resin composite, two of the low-viscosity bulkfill resin composites, x- Tra base and Venus Bulk Fill, produced larger gaps.
U2 - 10.2341/13-324-l
DO - 10.2341/13-324-l
M3 - Journal article
C2 - 25216940
SN - 0361-7734
VL - 40
SP - 190
EP - 200
JO - Operative Dentistry
JF - Operative Dentistry
IS - 2
ER -