GC EUROPE G-aenial - Manual (Page 26)

26 G-ænial Anterior & Posterior Technical Manual
8.0 literature
Light diffusion property of newly developed composite resin “G-ænial”
K. HIRANO, F. FUSEJIMA, T. KUMAGAI, and T. SAKUMA, GC Corporation, Tokyo, Japan
Abstract 3019, Genera session IADR 2010, Barcelona
Objectives: human teeth have unique light diffusion property which creates special colour
property. light diffusion property of composite resin is important to provide excellent aesthetic
result on direct composite resin restorations. We developed new composite resin "G-ænial" which
has excellent esthetic property and radiopacity. the aim of this study was to evaluate and compare
the light diffusion property of human teeth (dentin), newly developed composite resin "G-ænial"
and various composite resins.
Methods: human teeth and five composite resins [G-ænial (Gn, Gc corporation), herculite XRV
ultra (hu, Kerr corporation), PRemiSe (PR, Kerr corporation), Venus (Ve, heraeus Kulzer Gmbh)
and esthet. X hD (eh, Dentsply)] were examined. human teeth (dentin) specimen was prepared by
slicing and polishing to form 0.5mm in thick. Disk specimens 0.5 mm thick were prepared from each
composite resin. leD curing light (G-light, Gc) was used for curing composite resin specimens.
the light diffusion property was measured as diffusive light transmittance distribution through
specimen by Goniophotometer (GP-200, muRaKami cOlOuR ReSeRch laBORatORY corporation)
and evaluated for haze that is calculated from the ratio of diffusive light transmittance to total light
transmittance. Statistical analysis was performed using one-way anOVa (p-value<0.01).
Results: Mean values of Haze including standard deviations were shown as follows; (tests per
material; n=3).
haze (%)
human Dentin 97.2(0.7)
Gn 95.6(0.1)
hu 58.9(0.4)
PR 66.8(0.2)
Ve 60.2(0.5)
eh 46.9(0.4)
there is no significant difference on haze between human dentin and Gn. however, haze for other
composite resins except Gn were significantly lower than human dentin.
Conclusion: haze of G-ænial was higher than those of other composite resins and similar to that of
human dentin. these results suggested that G-ænial can provide esthetic result similar to natural
teeth on direct composite restorations.