A Review on the Resin Materials Light Curing Process

Characteristics of light-curing units (LCU), including irradiation uniformity and adequate light intensity, emission spectrum, exposure duration, correct light-curing technique, and regular monitoring of the LCU, are important factors in the success of composite resin restorations. In addition, infection control methods for LCUs have drawn great attention in recent years to control infection.
Search Strategy: An electronic search was carried out in PubMed and Science Direct databases from 1985 to 2016 using these key words: Light-curing unit, dental restoration failures, composite resin restorations, and dental restoration repair.
This article tries to draw attention to the importance of LCUs and discusses the relevant issues. Additionally, the consequences of delivering too little or too much light energy, the concerns over leakage from undercured resins, and the ocular hazards are discussed. Practical recommendations are provided to help clinicians improve their use of the LCU so that their patients can receive safe and potentially longer lasting resin restorations.