School of Dental Medicine, University of Zagreb, Croatian Dental Society - Croatian Medical Association
Abstract
Na stabilnost kompozita utječe sastav materijala, način polimerizacije, obrada površine, poroznost, izloženost sunčevom svjetlu, prehrana i higijena. Jednokomponentni materijal Heliosit i dvokomponentni Isopast podvrgnuti su ubrzanom starenju, da bi se metodom spektrofotometrijske refleksije utvrdila sklonost promjeni boje in vitro. Dvokomponentni materijal je potamnio, što je u skladu s kliničkim iskustvom, uz izraženu poroznost. Jednokomponentni materijal je pokazao bolju stabilnost boje, a neki uzorci izbijeljenja zbog nepotpune polimerizacije. Grubo obrađeni uzorci se doimlju svjetlijima, a razlika u promjeni boje između uzorka poliranih na dva različita načina nije opažena.Color stability of composite resin materials is influenced by composition of the material, type of curing, porosity, sunlight exposure, diet, and the oral hygiene. Light cured composite material Heliosit and chemically cured isosit were analysed under conditions of accelerated aging. Differences in color change were established between these two materials using the method of spectrophotometric reflection. Isopast became signifficantly darker and more porous, what is in agreement with clinical experience. Heliosit has shown better color stability, and some samples blanching because of the incomplete polymerisation. The samples with rough surfaces appeared linghter, and the manner of polishing have not caused differencies in color change between analysed samples
