Abstract
This study evaluated the interfacial integrity of deep (6 mm) Class-II (OM/OD) restorations placed using different bulk-fill resin composites [Filtek™ Bulk Fill Flowable Restorative (BF) and Filtek™ Bulk Fill Posterior Restorative (BP) (3M ESPE, St. Paul, MN, USA)] of different increment thicknesses (2 or 4 mm). BP was used for capping in all cases, while Filtek™ Z250 Universal Restorative (3M ESPE) was used as the control material. Interfacial debonding was measured during curing through acoustic emission (AE), followed by image analysis using micro-computed tomography and scanning electron microscopy. Microhardness testing was also conducted to assess degree of conversion. Depth of cure was adequate in all restorations. Specimens with 4-mm thick first increment of BF, which had a higher shrinkage strain, produced most AE events and debonding. Thus, bulk filling of deep cavities using bulk-fill resin composites with a high shrinkage strain should be avoided.
Original language | English (US) |
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Article number | dmj/2022-241 |
Pages (from-to) | 692-699 |
Number of pages | 8 |
Journal | Dental Materials Journal |
Volume | 42 |
Issue number | 5 |
DOIs | |
State | Published - 2023 |
Bibliographical note
Publisher Copyright:© 2023, Japanese Society for Dental Materials and Devices. All rights reserved.
Keywords
- Bulk-fill composite
- Debonding
- Increment thickness
- Micro-CT
- Polymerization shrinkage
PubMed: MeSH publication types
- Journal Article