A1 Journal article – refereed

Fatigue failure load of immature anterior teeth: influence of different fiber post-core systems

List of Authors: Márk Fráter, Tekla Sáry, Viktória Néma, Gábor Braunitzer, Pekka Vallittu, Lippo Lassila, Sufyan Garoushi

Publication year: 2021

Journal: Odontology

Volume number: 109

Number of pages: 9

ISSN: 1618-1247

DOI: http://dx.doi.org/10.1007/s10266-020-00522-y

URL: https://doi.org/10.1007/s10266-020-00522-y


The aim was to explore the
fracture-behavior, survival and marginal-microgaps within the root-canal of
immature anterior teeth restored with different fiber-reinforced post-core
composites (FRCs). 180 bovine-incisors were randomly divided into 6 groups (n=30). One group served as control
(group 6). The rest of the teeth were prepared to an internal diameter of 1.6
mm and the apex was sectioned. After application of an MTA-plug, teeth were
restored with FRC materials: Group 1: Bioblock technique with short
fiber-reinforced composite (SFRC); Group 2: Bioblock technique with flowable SFRC;
Group 3: Individually-made FRC post; Group 4: Conventional FRC post; Group 5: dual-cure
core build-up composite. After restorations were completed, teeth (n=5/group)
were sectioned and then stained. Specimens were viewed under a stereo
microscope and the percentage of microgaps within the root-canal was
calculated. Fatigue-survival was measured using a cyclic-loading testing
machine in the rest of the specimens. Flowable SFRC application in the root-canal
(Group 2) did not differ from intact-teeth regarding fatigue-survival (p>0.05). The rest of the groups produced significantly lower
survival (p<0.05) compared to intact-teeth.
Post/core restorations made from conventional FRC post (Group 4) exhibited a high number of microgaps
(38.3%) at the examined interphase in the root-canal. The restoration of immature
incisors with the use of flowable SFRC as post-core material displayed
promising performance in matter of fatigue-resistance and survival.

Last updated on 2021-24-06 at 10:24