Effect of photoactivation systems and resin composites on the microleakage of esthetic restorations.

Abstract

AIM:

The aim of this study was to evaluate the influence of four photoactivation systems [quartz tungsten halogen (QTH), light-emitting diode (LED), argon ion laser (AL), and plasma arc curing PAC)] on cementum/dentin and enamel microleakage of Class II restorations using a microhybrid [Z250-3M ESPE] and two packable composites [(SureFil-Dentsply and Tetric Ceram HB-Ivoclair/Vivadent].

METHODS AND MATERIALS:

Three hundred sixty "vertical-slot Class II cavities" were prepared at the mesial surface of bovine incisors using a 245 carbide bur in a highspeed handpiece. Specimens were divided into twelve groups (composite-photoactivation systems). Half of the specimens had the gingival margin placed in enamel (n=15) and the other half in cementum/dentin (n=15). Composites were inserted and cured in 2 mm increments according to manufacturers' recommended exposure times. After polishing, the samples were immersed in 2% methylene blue solution, sectioned, and evaluated at the gingival margins. Data were submitted to statistical analysis using the Kruskal-Wallis and Mann-Whitney tests.

RESULTS:

No significant differences were found among the photoactivation systems and among resin composites (p>0.05). Microleakage was not significantly affected by location (enamel vs. cementum/dentin, p>0.05). These findings suggested neither the photoactivation systems nor the resin composite types might have an effect on the microleakage at gingival margins Class II cavities.

• Authors: Larissa Maria Assad Cavalcante, Alessandra Resende Peris, Glaucia Maria Bovi Ambrosano, Andre Vicente Ritter, Luiz Andre Freire Pimenta
• Journal: The journal of contemporary dental practice (J Contemp Dent Pract) Vol. 8 Issue 2 Pg. 70-9 (Feb 01 2007) ISSN: 1526-3711 [Electronic] India
• PMID: 17277829 (Publication Type: Comparative Study, Evaluation Study, Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Composite Resins
• Filtek Z250
• Halogens
• SureFil packable composite
• Tetric ceram
• Xenon

Topics

• Animals
• Cattle
• Composite Resins (radiation effects)
• Dental Cavity Preparation
• Dental Equipment
• Dental Leakage (prevention & control)
• Dental Marginal Adaptation
• Dental Restoration, Permanent (methods)
• Halogens
• Lasers
• Light
• Phase Transition
• Random Allocation
• Semiconductors
• Statistics, Nonparametric
• Xenon