Document Type : Original Article
Authors
1
Clinical Instructor of Prosthodontics, Faculty of dentistry, Beirut Arab University, Beirut, Lebanon
2
Associate Professor of Prosthodontics, Beirut Arab University, Faculty of Dentistry, Assistant Professor of Fixed Prosthodontics, Faculty of Dentistry, Misr University for Science and Technology, Cairo, Egypt
3
Professor of Prosthodontics, Faculty of dentistry, Beirut Arab University, Beirut, Lebanon
4
Lecturer of Fixed Prosthodontics, Faculty of Dentistry, Misr University for Science and Technology, Cairo, Egypt
5
Lecturer of Fixed and Removable Prosthodontics Department, Oral and Dental Research Division, National Research Center, Cairo, Egypt
Abstract
Purpose: evaluate the bond strength of 2 fiber post systems to root canal dentine using 3 different protocols of dual-cure resin cements.
Materials and methods: Fifty-four freshly extracted human mandibular premolars were decoronated and endodontically treated. Post spaces were prepared to a depth of 8 mm and width of 1.3 mm, using manufacture’s supplied drills. Teeth were randomly assigned into 2 groups (n= 27), according to fiber post light-transmission: group I; non-light transmitting fiber posts (Reforpost, Angelus; Brasil), group II; light transmitting fiber post (Exacto, Angelus; Brasil). Each group were further divided into 3 subgroups (n=9) according to the adhesive protocol used (subgroup A; “SpeedCEM” self-adhesive, subgroup B; “Multilink Automix” self-etch, subgroup C; “Variolink II” total etch); “Ivoclar Vivadent; Liechtenstein”. Using low speed saw (IsoMet, BUEHLER Worldwide Headquarters; USA), a 2 mm thickness coronal, middle and apical sections were obtained from each sample. All specimens were subjected to push out test using Instron machine (Lloyd Instruments Ltd; UK), until failure. Specimens were investigated under the stereomicroscope (BM1000; Jiangan Novle Optics Co., China) to study the mode of failure. Data was collected and statistically analyzed.
Results: In non-light transmitting group (GI); self-etch scored highest cohesive values (13), followed by self-adhesive (7) and finally total-etch (6). Regarding light transmitting group (GII); highest score was found in total-etch (11), followed by self-etch (8), and finally the self-adhesive(1).
Conclusions: Self-etch resin cement with a non-light transmitting fiber post might be a good choice to be used
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