- All Journals
- Al-Qadisiyah University
- Basrah University
- Kirkuk University
- Mosul University
- The Iraqi Borad for Medical Specialization
- University of Anbar
- University of Technology
- Al Mustafa University
- Al-Zahraa University for Women
- Alnoor University
- Kunooz University
- Misan University
- Ninevah University
- Tikrit University
- University of Al-Hamdaniya
- University of Kerbala
The influence of different light curing systems with different curing depth on the microhardness of packable composites. | ||
| Journal of baghdad college of dentistry | ||
| Article 1, Volume 22, Issue 1, 2010, Pages 1-6 | ||
| Authors | ||
| ; Ali H. Al; ; a J. Kadum | ||
| Abstract | ||
| ABSTRACTBackground: Adequate polymerization of resin composite is considered to be very important factor. The aim of thisstudy was to evaluate and compare the influence of different light curing system (conventional QTH, LED and PACunits) with different polymerization depth (0-1,1-2, 2-3, 3-4 and 4-5 mm) on microhardness of two types of packablecomposite (Filtek p60 & Surefil).Materials and Methods: Two types of packable composites (Filtek p60 and Surefil) were tested. Thirty hemi cylindricalspecimens (5mm diameter x 6mm height) were made for each material. Photo-activation was performed usingconventional QTH, light emitting diodes (LED) or plasma arc (PAC).Exposure times were 40 seconds for QTH and LEDlights, and 12 seconds for the PAC light. After one day of storage, the microhardness test was measured at 5mmdepth intervals (0-1, 1-2, 2-3, 3-4 and 4-5 mm).Results: The microhardness of packable composite resins (Filtek p60) showed a significantly higher microhardnessthan packable composite (Surefil) in all light activation systems and in all depth intervals. The LED light curing systemproduced superior mean microhardness value followed by conventional QTH and PAC light curing systemsrespectively. And all of the tested composite resins groups with the three different types of light activation systemsshowed a significant decrease in the microhardness with the increase of depth.Conclusion: The microhardness of packable composite is affected by the type of materials, light curing systems andcuring depths.Key words: microhardness, packable composite, light curing systems, curing depths. J Bagh Coll Dentistry 2010;22(1):1-6 | ||
|
Statistics Article View: 192 PDF Download: 102 |
||