SURFACE HARDNESS AND WEAR OF GLASS IONOMERS AND COMPOMERS

Citation
A. Peutzfeldt et al., SURFACE HARDNESS AND WEAR OF GLASS IONOMERS AND COMPOMERS, American journal of dentistry, 10(1), 1997, pp. 15-17
Citations number
20
Categorie Soggetti
Dentistry,Oral Surgery & Medicine
ISSN journal
08948275
Volume
10
Issue
1
Year of publication
1997
Pages
15 - 17
Database
ISI
SICI code
0894-8275(1997)10:1<15:SHAWOG>2.0.ZU;2-6
Abstract
Purpose: To determine the surface hardness and in vitro wear of glass ionomer cements (GIC) and compomers in comparison with a resin composi te and to test for a possible correlation between the determined hardn ess and wear values. Materials and Methods: Samples were made of conve ntional GIC (Ketac-Fil, Fuji II, Fuji IX, Ketac-Prototype = Ketac-Mola r), resin-modified GIC (Photac-Fil, Fuji II LC, Vitremer), compomers ( Dyract, Compoglass) and resin composite (Z100) for the hardness test ( n = 10) and for the wear test (n = 3). The materials were handled acco rding to the manufacturers' instructions. The samples were stored in d eionized water for 48 hours at 37 degrees C prior to the determination of Rockwell hardness and three-body in vitro wear. Results: Hardness could not be measured on Ketac-Fil and Fuji II as the samples fracture d before a reading was obtainable. Statistically significant differenc es were found in hardness and wear between brands and between the four types of material. Surface hardness: resin-modified GIC < conventiona l GIC = compomers < resin composite. In vitro wear: resin-modified GIC > compomers > conventional GIC > resin composite. A negative correlat ion between hardness and wear was recorded.