Evaluation of Argon Laser and Conventional Light-Cured Composites

Abstract

This study was conducted to compare and evaluate the diametral tensile strengths of four current commercial composite resins cured with an argon laser versus a conventional (conv.) visible light. The argon laser (HGM Model 8) at 231, 280, and 450 mW, 5 mm beam size, and 10 sec exposure and a conventional visible light unit (the Max) at 20 and 40 sec exposure were used to polymerize samples of composite resins: AelitefU, Charisma, Silux Plus, and TPH. The samples were stored in light proof containers for 24 hr at room temperature and then tested on the Instron machine for diametral tensile strengths (MPa). Generally, the best results for the laser were at 280 mW. The diametral tensile strengths of laser-cured composites, with 50-75% less polymerizing time, were equal to or greater than those of the conventional light.

Argon-Ion Laser Vs Quartz-Tungsten-Halogen Curing of Polyacid Modified Composite Resin Restorative Materials

“…Studies continue to support the ability of the argon laser to cure composite fast and effectively. 11,42,43,44 Vergas et al 11 reported adequately polymerized composite resin in 30% to 50% less time. Christensen and Christensen 44 reported efficient polymerization in 10 seconds or less for five different resins.…”