La Torre G, Marigo L, Pascarella G A, Rumi G
Cattedra di Odontoiatria Conservatrice, Istituto di Clinica Odontoiatrica, Università Cattolica del Sacro Cuore, Roma, Italy.
Minerva Stomatol. 2003 May;52(5):193-200.
An adequate polymerization of resin composites can significantly contribute to increase the longevity of a restoration. In this field, the choice of the operative technique and the characteristics of the lamp are very important. The aim of this review was to evaluate the effectiveness of cure of the light-emitting diodes (LED) lamps comparing them to the others currently available for resin composites photopolymerization. At present, halogen lamps are the most commonly used light sources, but this technology does not allow further developments; even plasma arc and laser lamps have some drawbacks. The innovative LED technology, based on semiconductors, opened new and interesting views in the field of photopolymerization; to the advantages of a soft-start polymerization they add the safety, efficiency, economy and long lifetime of LED light. A careful review of the literature revealed that, although their lower emission of light, these lamps are capable of a polymerization qualitatively comparable to other light sources. Physical and mechanical properties, degree of conversion, depth of cure and final hardness of the composites cured with a LED light are similar to the values achieved with the halogen lamp, whereas the temperature increase is significantly lower and does not pose a threat to the pulp tissue. Undoubtedly, more tests of the mechanical properties of composites processed with LED units need to be carried out but, as the technology improves, LED curing will become an interesting alternative to existing curing methods.
树脂复合材料的充分聚合能显著有助于延长修复体的使用寿命。在这一领域，操作技术的选择和灯的特性非常重要。本综述的目的是评估发光二极管（LED）灯与目前用于树脂复合材料光聚合的其他灯相比的固化效果。目前，卤素灯是最常用的光源，但这项技术无法进一步发展；即使是等离子弧灯和激光灯也有一些缺点。基于半导体的创新LED技术在光聚合领域开辟了新的、有趣的前景；除了软启动聚合的优点外，它们还具备LED光的安全性、效率、经济性和长寿命。对文献的仔细回顾表明，尽管这些灯的光发射较低，但它们能够实现与其他光源在质量上相当的聚合。用LED光固化的复合材料的物理和机械性能、转化率、固化深度和最终硬度与用卤素灯获得的值相似，而温度升高明显更低，不会对牙髓组织构成威胁。毫无疑问，需要对用LED装置加工的复合材料的机械性能进行更多测试，但随着技术的改进，LED固化将成为现有固化方法的一个有趣替代方案。
