Factors affecting cure of visible light activated composites.

摘要: Since visible light activated composites first appeared in 1978 they have become internationally popular for the aesthetic restoration of anterior teeth. With an ever increasing number composite formulations and curing lights available as yet no widely recognized standard measuring depth cure, it is difficult to interpret claims being made by manufacturers. A laboratory technique using incremental measurement surface hardness has been shown provide a convenient means assessing cure throughout sample, which relates clinical situation. Using this method possible demonstrate that physical chemical formulation factors; nature source; control exercised practitioner, are all important determining quality achieved hence likely long term performance restoration. Light cured now more used occlusal cavities posterior teeth, where offers advantages control, handleability lack porosity unattainable chemically system. In large Class II depths can exceed 7 mm, application critical essential satisfactory level achieved. To obtain this, even with exposure times significantly longer than those currently recommended, advisable employ layering any cavity greater 3 or 4 mm depth.