Abstract
Objectives: The purpose of this study was to determine the effect of different layering techniques on cuspal deflection in direct composite restorations. Methods: Aluminum blocks were used to prepare MOD cavities divided into three groups. Each cavity was restored with composite using three different filling techniques. Group 1 was filled in bulk, group 2 was restored by a horizontal increment technique, and group 3 by an oblique increment technique. Cuspal deflection was measured with LVDT probes and compared among groups using ANOVA and Scheffe's post hoc test (α = 0.05). Results: The cuspal deflections in groups 1-3 were 21.6 ± 0.90 μm, 19.3 ± 0.73 μm and 18.4 ± 0.63 μm, respectively. The bulk filling technique yielded significantly more cuspal deflection than the incremental filling techniques, while there was no significant difference between the horizontal and oblique increment methods. Significance: Cuspal deflection resulting from polymerization shrinkage can be reduced by incremental filling techniques to obtain optimal outcomes in clinical situations.
Original language | English (US) |
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Pages (from-to) | 1501-1505 |
Number of pages | 5 |
Journal | Dental Materials |
Volume | 24 |
Issue number | 11 |
DOIs | |
State | Published - Nov 2008 |
Keywords
- Bulk filling
- Composite restoration
- Cusp deflection
- Horizontal incremental filling
- Oblique incremental filling
ASJC Scopus subject areas
- General Materials Science
- General Dentistry
- Mechanics of Materials