El-Askary, Farid; Hassanein, Abdullah; Aboalazm, Emad; Al-Haj Husain, Nadin; Özcan, Mutlu (2022). A Comparison of Microtensile Bond Strength, Film Thickness, and Microhardness of Photo-Polymerized Luting Composites. Materials, 15(9) Molecular Diversity Preservation International MDPI 10.3390/ma15093050
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The aim of this study was to evaluate the effect of CAD/CAM composite thickness on micro-tensile bond strength (µTBS), microhardness (HV), and film thickness (FT) of different luting composites. Composite blocks (6.8 mm × 6.8 mm) were divided into 12 groups according to: CAD/CAM thickness and luting composite. For each group, 21 rods (1 mm × 1 mm) were tested in tension at crosshead speed of 1 mm/min. Fracture modes were categorized as adhesive, mixed, and cohesive. Microhardness (n = 5/group) was assessed using microhardness tester. Film thickness (12-rods/group) was evaluated using a stereomicroscope (×40). Data were analyzed using the two-way ANOVA/Tukey's HSD test (p = 0.05). Parameters "thickness", "cement", and "thickness x cement" showed significant difference on µTBS and HV (p < 0.05). At 2 mm, heated x-tra fil composite showed the highest µTBS (45.0 ± 8.5 MPa), while at 4 mm thickness, Grandio Flow revealed the lowest µTBS (33.3 ± 6.3 MPa). Adhesive, mixed, and cohesive failures were reported. The HV of all composites decreased when photo-polymerized through 4 mm thickness (p < 0.05). Regardless of CAD/CAM thickness, photo-polymerized composites can be successfully used for luting CAD/CAM composite.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
04 Faculty of Medicine > School of Dental Medicine > Department of Reconstructive Dentistry and Gerodontology |
UniBE Contributor: |
Al-Haj Husain, Nadin |
Subjects: |
600 Technology > 610 Medicine & health |
ISSN: |
1996-1944 |
Publisher: |
Molecular Diversity Preservation International MDPI |
Language: |
English |
Submitter: |
Pubmed Import |
Date Deposited: |
23 May 2022 08:43 |
Last Modified: |
05 Dec 2022 16:20 |
Publisher DOI: |
10.3390/ma15093050 |
PubMed ID: |
35591383 |
Uncontrolled Keywords: |
CAD/CAM composite dual-cured resin cement film thickness microhardness photo-polymerized composite pre-heating µ-tensile bond strength |
BORIS DOI: |
10.48350/170159 |
URI: |
https://boris.unibe.ch/id/eprint/170159 |
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