S. Uctasli et al., VARIABLES AFFECTING THE FRACTURE-TOUGHNESS OF RESIN-BASED INLAY ONLAYSYSTEMS, Journal of oral rehabilitation, 20(4), 1993, pp. 423-431
The fracture toughness of five different resin-based inlay/onlay mater
ials was investigated by means of critical stress intensity factor (K(
IC)) using the SEN three-point bending test procedure (BS 5447: 1977).
K(IC) values were determined from specimens prepared by both the dire
ct and indirect techniques. Tests were performed immediately, after 1
day, 1 month and 3 month time intervals. Also, fractured surfaces of s
pecimens were observed using SEM photographs.