Jang Chang-Min, Seol Hyo-Joung, Kim Hyung-Ii, Kwon Yong Hoon
Department of Dental Materials, College of Dentistry and Medical Research Institute, Pusan National University, Seo-gu, Busan, Korea.
Photomed Laser Surg. 2009 Dec;27(6):871-6. doi: 10.1089/pho.2008.2322.
To examine the degree of polymerization of nanocomposite resins to test the possibility of using a diode-pumped solid state (DPSS) laser as a light-curing source on behalf of the argon laser.
DPSS lasers emitting light at 473 nm have many advantages over argon lasers on account of their compactness, efficiency, and price.
A 473-nm DPSS laser (LAS) was used with three other light-curing units (a quartz-tungsten-halogen lamp-based unit, a light emitting diode-based unit, and a xenon lamp-based plasma arc unit) to polymerize dental nanocomposite resins. The degree of polymerization was determined by measuring the microhardness, maximum polymerization shrinkage, and increase in temperature during and after light curing. The results were analyzed statistically.
The specimens light cured with LAS showed a microhardness that was similar or superior to the values obtained from the specimens cured with the other light-curing units and maximum polymerization shrinkage values. The maximum increase in temperature by LAS was much lower than that induced by the other light-curing units.
LAS effectively polymerizes dental nanocomposite resins to an extent similar to that of recently available light-curing units. The results suggest that LAS has good potential as a light source for light curing of dental nanocomposite resins.
检测纳米复合树脂的聚合程度，以测试使用二极管泵浦固态（DPSS）激光器替代氩激光作为光固化光源的可能性。
发射473nm波长光的DPSS激光器因其紧凑性、效率和价格，相较于氩激光具有诸多优势。
使用一台473nm的DPSS激光器（LAS）与其他三种光固化设备（基于石英钨卤素灯的设备、基于发光二极管的设备和基于氙灯的等离子弧设备）对牙科纳米复合树脂进行聚合。通过测量光固化过程中和光固化后的显微硬度、最大聚合收缩率以及温度升高来确定聚合程度。对结果进行统计学分析。
用LAS光固化的试样显示出的显微硬度与用其他光固化设备固化的试样所获得的值相似或更高，且最大聚合收缩率值也如此。LAS引起的最大温度升高远低于其他光固化设备所引起的温度升高。
LAS能有效地使牙科纳米复合树脂聚合，其程度与近期可用的光固化设备相似。结果表明LAS作为牙科纳米复合树脂光固化光源具有良好的潜力。
