en
Scientific article
English

The influence of FRCs reinforcement on marginal adaptation of CAD/CAM composite resin endocrowns after simulated fatigue loading

Published inOdontology, vol. 104, no. 2, p. 220-232
Publication date2016
Abstract

To evaluate the marginal adaptation of endodontically treated molars restored with CAD/CAM composite resin endocrowns either with or without reinforcement by fibre reinforced composites (FRCs), used in different configurations. 32 human endodontically treated molars were cut 2 mm over the CEJ. Two interproximal boxes were created with the margins located 1 mm below the CEJ (distal box) and 1 mm over the CEJ (mesial box). All specimens were divided in four groups (n = 8). The pulp chamber was filled with: group 1 (control), hybrid resin composite (G-aenial Posterior, GC); group 2, as group 1 but covered by 3 meshes of E-glass fibres (EverStick NET, Stick Tech); group 3, FRC resin (EverX Posterior, GC); group 4, as group 3 but covered by 3 meshes of E-glass fibres. The crowns of all teeth were restored with CAD/CAM composite resin endocrowns (LAVA Ultimate, 3M). All specimens were thermo-mechanically loaded in a computer-controlled chewing machine (600,000 cycles, 1.6 Hz, 49 N and simultaneously 1500 thermo-cycles, 60 s, 5-55 °C). Marginal analysis before and after the loading was carried out on epoxy replicas by SEM at 200× magnification. For all the groups, the percentage values of perfect marginal adaptation after loading were always significantly lower than before loading (p < 0.05). The marginal adaptation before and after loading was not significantly different between the experimental groups (p > 0.05). Within the limitations of this in vitro study, the use of FRCs to reinforce the pulp chamber of devitalized molars restored with CAD/CAM composite resin restorations did not significantly influenced their marginal quality.

Citation (ISO format)
ROCCA, Giovanni Tommaso et al. The influence of FRCs reinforcement on marginal adaptation of CAD/CAM composite resin endocrowns after simulated fatigue loading. In: Odontology, 2016, vol. 104, n° 2, p. 220–232. doi: 10.1007/s10266-015-0202-9
Main files (1)
Article (Published version)
accessLevelRestricted
Identifiers
ISSN of the journal1618-1247
577views
6downloads

Technical informations

Creation04/23/2015 4:20:00 PM
First validation04/23/2015 4:20:00 PM
Update time03/14/2023 11:38:19 PM
Status update03/14/2023 11:38:18 PM
Last indexation01/16/2024 6:58:52 PM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack