Yu Hyung-Seong, Lee Kee-Joon, Jin Guang-Chun, Baik Hyoung-Seon
Department of Orthodontics, College of Dentistry, Yonsei University, Seoul, South Korea.
World J Orthod. 2007 Summer;8(2):129-35.
The xenon plasma arc curing light and the LED curing light have substantially decreased the time required for polymerizing a bracket bonding composite. However, the expense and size of the plasma arc curing light has limited its use. The LED curing light is less expensive, smaller in size, and easier to handle. This study compared the bond strength afforded by the plasma arc curing light with that produced by the LED curing light, according to the polymerization time. In addition, the polymerization time required for adequate adhesion of the bracket was examined. After positioning the orthodontic brackets with the composite resin onto 120 human premolars, the plasma arc curing light and the LED curing light were used to polymerize the composite resin at 4-, 6-, and 8-second timepoints. The results showed that the LED curing light produces a bond strength sufficient for maintaining the orthodontic bracket even with a short burst of polymerization. Therefore, it is expected that the LED curing light will be readily accepted by orthodontists.
氙等离子弧固化灯和发光二极管（LED）固化灯已大幅缩短了聚合托槽粘结复合材料所需的时间。然而，等离子弧固化灯的成本和尺寸限制了其应用。LED固化灯成本较低、尺寸更小且易于操作。本研究根据聚合时间，比较了等离子弧固化灯与LED固化灯产生的粘结强度。此外，还研究了托槽充分粘结所需的聚合时间。将复合树脂正畸托槽放置在120颗人类前磨牙上后，分别使用等离子弧固化灯和LED固化灯在4秒、6秒和8秒的时间点对复合树脂进行聚合。结果表明，即使聚合时间较短，LED固化灯产生的粘结强度也足以维持正畸托槽。因此，预计LED固化灯会很容易被正畸医生接受。
