Abstract
Effect of variation in morphology and size of filler particles, temperature and increase in condensation speed on packability of resin-composites was investigated. Eight experimental light-cured resin-composites (RZDn series) were tested. Each material was placed in a cylindrical mould at 26 or 32ºC. A flat-ended stainless-steel probe (φ=6 mm) was mechanically lowered with two different speeds 2 and 8 mm/s onto and into at the surface of the unset sample until a compressive force of 1 N was reached. This was repeated for five cycles, and from each cycle Fp was calculated. All spherical and irregular filler particle resin-composites showed a decrease in Fp with increase in number of compressions. Increase in temperature also decreased Fp, but this effect was not very prominent in the case of irregular filler resin-composites. Filler particle morphology, increase in temperature and compression cycle speed has a prominent effect on packability of resin-composites.
| Original language | English |
|---|---|
| Pages (from-to) | 340-347 |
| Number of pages | 8 |
| Journal | Dental Materials Journal |
| Volume | 36 |
| Issue number | 3 |
| Early online date | 31 May 2017 |
| DOIs | |
| Publication status | Published - 2017 |
Keywords
- Cyclic loading
- Filler morphology
- Packability
- Resin composite