Comparing Between Two Lights Curing of Dental Restorative (Laser and Halogen) by Using Physical Parameters

Abstract

Light sources and light curing techniques for composite resins have improved remarkably.  Aragon Ion Laser (AL) have been introduced for curing dental composite and to overcome drawbacks of the conventional quartz-tungsten halogen lights (QTHs). The aim of research to study the mechanical properties (Hardness & Degree of cure) of  composite material after light curing by different sources (Halogen and Laser). These feature were including hardness and depth of cure in both curing unit ( laser argon and halogen light ) in different exposure (10 , 20 , and 30) by using two of fillers material swissTEC and composan LCM types . The(216) samples have been prepared and dividing into (6) groups , micrometer are used to measuring the depth of cure according to (ISO 4049/2000) . Hardness test are made by Vickers hardness testing with diameter (6mm) and thickness (2mm) of samples, The results of the depth of cure appeared the resin composite by aragon laser light curing is greater than halogen light with about (0.05).In (10 sec ) depth of cure (DOC) of halogen in 2.072, but in laser argon is2.640, 20 sec halogen is 3.047 ,  and in aragon laser is 3.090 of swissTEC type but for composanLCM for (10 sec) depth of cure halogen is 2.25, laser argon is 2.530, 20 Sec halogen is 2.577 , but in aragon laser is 2.921 , the result values of (DOC), hardness tests are increased with increasing the exposure time, also show the depth of cure and hardness for swissTEC type larger than composan LCM. The properties of the composite enhance better when laser is used as a cure unit in a comparison with the halogen light.