Ak Asli Topaloglu, Alpoz A Riza, Bayraktar Oguz, Ertugrul Fahinur
Research Assistant, Ege University, School of Dentistry, Department of Paediatric Dentistry, Izmir, Turkey.
Eur J Dent. 2010 Jan;4(1):34-40.
To measure the release of TEGDMA and BisGMA from two commercially available composite resins; Filtek Z 250 (3M ESPE, Germany), Leaddent (Leaddent, Germany) and two fissure sealants; Helioseal F (3M ESPE, Germany) Enamel Loc (Premiere Rev, USA) over 1, 3 and 7 days after polymerization with standard quartz-tungsten halogen Coltolux II (QHL) (Coltene Switzerland) and a standard blue light emitting diode Elipar Freelight 2 (3M ESPE, Germany).
9 samples of each material were placed in disc shaped specimens in 1 mm of thickness and 10 mm in diameter (n=36). Each material was polymerized using LED for 20 s (n=12), 40 s (n=12) and halogen for 40 s (n=12), respectively. High Performance Liquid Chromatography (HPLC) was used to measure the amount of monomers released over 1, 3 and 7 days. Data was analyzed using one way ANOVA and Bonferroni test for multiple comparisons with a significance level of .05.
LED 20 sec group showed the highest release of monomers at 1, 3 and 7 days in sealant groups. Halogen 40 sec group resulted highest release of monomers for Leaddent at all time intervals (P<.05)
Efficiency of the curing unit and applying the recommended curing time of the light activated resin based dental materials is very important to protect the patient from potential hazards of residual monomers.
测量两种市售复合树脂（德国3M ESPE公司的Filtek Z 250、德国Leaddent公司的Leaddent）以及两种窝沟封闭剂（德国3M ESPE公司的Helioseal F、美国Premiere Rev公司的Enamel Loc）在使用标准石英-钨卤素灯Coltolux II（瑞士Coltene公司）和标准蓝光发光二极管Elipar Freelight 2（德国3M ESPE公司）聚合1天、3天和7天后TEGDMA和BisGMA的释放量。
每种材料制备9个厚度为1mm、直径为10mm的圆盘形样本（n = 36）。每种材料分别使用LED灯照射20秒（n = 12）、40秒（n = 12）以及卤素灯照射40秒（n = 12）进行聚合。采用高效液相色谱法（HPLC）测量1天、3天和7天后释放的单体量。使用单因素方差分析和Bonferroni检验进行数据分析，多重比较的显著性水平为0.05。
在窝沟封闭剂组中，LED灯照射20秒组在1天、3天和7天时单体释放量最高。在所有时间间隔内，卤素灯照射40秒组的Leaddent单体释放量最高（P < 0.05）。
固化设备的效率以及应用光固化树脂基牙科材料的推荐固化时间对于保护患者免受残留单体的潜在危害非常重要。
