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Short fiber-reinforced composite in cementation of fiber-reinforced composite post

Myller, Peter (2025-03-25)

Short fiber-reinforced composite in cementation of fiber-reinforced composite post

Myller, Peter
(25.03.2025)
Katso/Avaa
Myller_Peter_opinnayte.pdf (462.8Kb)
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Julkaisu on tekijänoikeussäännösten alainen. Teosta voi lukea ja tulostaa henkilökohtaista käyttöä varten. Käyttö kaupallisiin tarkoituksiin on kielletty.
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Julkaisun pysyvä osoite on:
https://urn.fi/URN:NBN:fi-fe2025040724157
Tiivistelmä
Abstract
Objectives: The aim of this in vitro study was to investigate bonding of resin composites of two kinds used as luting cement for fiber-reinforced composite post.
Methods: Two different composites were tested; light-cure flowable short fiber-reinforced composite (SFRC) everX Flow (Dentin, GC) and dual-cure composite Gradia Core (GC). Four groups were made with everX Flow and four with Gradia Core. Two different prefabricated fiber-reinforced composite (FRC) posts (diameter 1.6 mm) were used, GC-post (GC) and Snowpost (Abrasive Technology). Posts were conditioned with two different primers, either Ceramic Primer (GC) or G-multiprimer (GC). After conditioning, the posts were placed in the resin composites and pressed between two glass plates along the long axis of the post into thickness of 1.6 mm and then light-polymerized. The post-composite plates were cut to micro-tensile strength test specimens (1.6mm x 1.6mm x 18mm). Eight different test groups were made (n= 7 per group). Micro-tensile bond strength of the specimens were measured and fracture types were categorized.
Results: Both composite groups (everX Flow and Gradia Core) had similar bond strength values being between 7.5-13.5 MPa. No significant difference in the tensile strength between post and cement material was found between the groups (p>0.05).
The fracture types showed significant differences between the post groups (p<0.001) varying from adhesive to cohesive in type.
Conclusion: EverX Flow revealed similar bonding properties to FRC post than Gradia Core and could alternatively be used as a cement material with fiber-reinforced composite post if light curing of the everX Flow can be confirmed.
Kokoelmat
  • Pro gradu -tutkielmat ja diplomityöt sekä syventävien opintojen opinnäytetyöt (kokotekstit) [9103]

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