Bulk-Fill Resin Composites: Polymerization Contraction, Depth of Cure, and Gap Formation

Ana Raquel Benetti, Cæcilie Havndrup-Pedersen, Daniel Honoré, Maiken K Pedersen, Ulla Pallesen

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

208 Citationer (Scopus)

Abstract

SUMMARY 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 bulk-fill resin composites, x-tra base and Venus Bulk Fill, produced larger gaps.

OriginalsprogEngelsk
TidsskriftOperative Dentistry
Vol/bind40
Udgave nummer2
Sider (fra-til)190-200
Antal sider11
ISSN0361-7734
DOI
StatusUdgivet - mar. 2015

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