UNIGE document Scientific Article
previous document  unige:75425  next document
add to browser collection
Title

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

Authors
Feilzer, Albert
Published in Odontology. 2016, vol. 104, no. 2, p. 220-232
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.
Identifiers
PMID: 25854165
Full text
Article (Published version) (1.9 MB) - document accessible for UNIGE members only Limited access to UNIGE
Structures
Research groups Groupe Krejci Ivo (médecine dentaire) (240)
Epidémiologie clinique (115)
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. https://archive-ouverte.unige.ch/unige:75425

176 hits

2 downloads

Update

Deposited on : 2015-09-28

Export document
Format :
Citation style :