Abstract | OBJECTIVES: To test marginal and internal adaptation of five different adhesive composite core systems under load. METHODS: 30 human premolars were endodontically prepared and obturated with an epoxy sealer and vertically condensed gutta-percha. Thereafter the entire clinical crown was removed. The teeth were randomly assigned to five different composite core groups, all using the same fiber reinforced radicular post (DT White). Gr. 1: Optibond solo plus/ Nexus II/ Prodigy; Gr. 2: Scotchbond 1/ Rely X Arc/Filtek P60; Gr. 3: EBS multi/ Compolute applicap/Pertac II; Gr. 4: ART Bond/ Parapost cement/Synergy; Gr. 5: Superbond C&B catalyst S+polymer/Metafil CX. Polyvinyl-siloxane impressions of the external margins of the cores were readied before and after 1,200,000 cycles of mechanical loading with max. 100 N at 45 degrees to the longitudinal axis of the tooth. After loading, 5 of the 6 samples of each group were cut longitudinally and the sixth sample was cut transversally to be able to take replicas for evaluation of internal adaptation after loading. RESULTS: Percentages of external "continuous margins" ranged from 97.9+-4.6 to 66.5+-7.8 before and from 87.4+-25.0 to 5.8+-12.5 after loading. Internal adaptation ranged from 96.4+-8.0 to 17.1+-20.4 after loading for the core adaptation and from 89.8+-12.2 to 65.9+-14.3 for the dentin-luting composite interface and from 99.4+-1.2 to 88.6+-9.4 for the composite-post interface. CONCLUSIONS: Surprisingly, the best materials' combination for the adhesive composite core was a self-etch light cured adhesive with a chemically cured luting agent.
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Authors | Olivier Duc, Ivo Krejci |
Journal | Journal of dentistry
(J Dent)
Vol. 37
Issue 8
Pg. 622-6
(Aug 2009)
ISSN: 1879-176X [Electronic] England |
PMID | 19443096
(Publication Type: Comparative Study, Journal Article)
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Chemical References |
- ART Bond
- Cyanoacrylates
- Dental Materials
- EBS adhesive system
- Maleates
- Methacrylates
- OptiBond Solo Plus
- Phosphoric Acids
- Resin Cements
- Super Bonder Instant Adhesive
- Scotchbond
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Topics |
- Cyanoacrylates
(chemistry)
- Dental Bonding
(methods)
- Dental Marginal Adaptation
- Dental Materials
(chemistry)
- Dental Stress Analysis
- Humans
- Maleates
(chemistry)
- Methacrylates
(chemistry)
- Phosphoric Acids
(chemistry)
- Post and Core Technique
- Resin Cements
(chemistry)
- Tooth, Nonvital
- Weight-Bearing
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