title: The effect of curing with plasma light on the shrinkage of dental restorative materials.
abstract: Commercially available light activated dental composites were used in this study to compare the shrinkage following curing with plasma light (Apollo95E, DMDS) and a convention halogen dental curing light (Prismetics Lite II, Dentsply). Polymerization shrinkage was determined by measuring the strain in one dimension by means of a contacting transducer. The percentage linear shrinkage were: Spectrum H = 1.84 + 0.31, P = 1.49 + 0.35*; Ana aesthetic H = 2.04 + 0.38, P = 1.85 + 0.27; Esthet.x H = 1.66 + 0.28, P = 1.69 + 0.25; Dyract AP H = 2.39 + 0.33, P = 2.18 + 0.35*; Apollo Restore H = 1.88 + 0.36, P = 1.42 + 0.33*; Surefil H = 0.88 + 0.28, P = 0.99 + 0.30 where * = significantly different, t-test at P < 0.05. The results suggested that there was less shrinkage when curing some, but not all, materials using the plasma light, although this could be attributed to a reduced level of polymerization.
authors.affiliation: Department of Biomaterials, GKT Dental Institute, King's College, London, UK. sanjukta.deb@kcl.ac.uk
authors.forename: S
authors.initials: S
authors.lastname: Deb
authors.forename: R
authors.initials: R
authors.lastname: Mallett
authors.forename: B
authors.initials: B
authors.lastname: Millar
mesh_terms: D003188:Composite Resins / Q000528:radiation effects*; D001840:Dental Bonding / Q000592:standards*; D003748:Dental Equipment / Q000592:standards; D003764:Dental Materials; D006801:Humans; D008027:Light; D008422:Materials Testing
chemical_list: D003188:Composite Resins; D003764:Dental Materials