Sener Yagmur, Uysal Tancan, Basciftci Faruk Ayhan, Demir Abdullah, Botsali Murat Selim
Department of Pediatric Dentistry, Faculty of Dentistry, Selcuk University, Konya, Turkey.
Angle Orthod. 2006 Jul;76(4):677-81. doi: 10.1043/0003-3219(2006)076[0677:CAHHLE]2.0.CO;2.
The objectives of this study were to compare the polymerization shrinkage of three orthodontic adhesives. In addition we wanted to determine the effectiveness of the high-intensity quartz tungsten halogen (HQTH) in curing orthodontic adhesives on polymerization shrinkage with that of the quartz tungsten halogen (QTH). A total of 120 glass ring molds were prepared using a low-speed saw. The internal surface of the glass rings were roughened and etched. Adhesive pastes were placed into the glass molds, which were sandwiched between two glass slides. Samples were divided into six groups according to the combination of three orthodontic adhesives (Kurasper F, Light Bond, and Transbond XT) and two light intensities. One half of each 40 samples of three adhesive pastes was polymerized for 20 seconds by a QTH (Hilux 350), and the other half was polymerized for 10 seconds by a HQTH (Optilux 501). The volumetric polymerization shrinkage for each system was measured through the specific density method modified by Puckett and Smith. Statistical analysis was performed using two-way analysis of variance for intergroup comparisons. The HQTH-curing unit resulted in a more polymerization shrinkage than did the QTH for all investigated adhesives. However, no statistically significant differences were found. The highest shrinkage was observed for Light Bond cured with HQTH (1.59 +/- 0.82%), and the lowest value was observed for Transbond XT cured with QTH (1.23 +/- 0.60%). There are no significant differences in polymerization shrinkage of the three investigated orthodontic adhesives when polymerized with a QTH or a HQTH.
本研究的目的是比较三种正畸粘合剂的聚合收缩率。此外，我们还想确定高强度石英钨卤素灯（HQTH）与石英钨卤素灯（QTH）相比，在固化正畸粘合剂时对聚合收缩率的影响。使用低速锯制备了总共120个玻璃环模具。玻璃环的内表面进行了粗糙化和蚀刻处理。将粘合剂糊剂放入玻璃模具中，模具夹在两片载玻片之间。根据三种正畸粘合剂（Kurasper F、Light Bond和Transbond XT）与两种光照强度的组合，将样本分为六组。三种粘合剂糊剂的每组40个样本中，一半通过QTH（Hilux 350）聚合20秒，另一半通过HQTH（Optilux 501）聚合10秒。通过Puckett和Smith改良的比重法测量每个系统的体积聚合收缩率。使用双向方差分析进行组间比较的统计分析。对于所有研究的粘合剂，HQTH固化单元导致的聚合收缩率比QTH更高。然而，未发现统计学上的显著差异。观察到HQTH固化的Light Bond收缩率最高（1.59±0.82%），QTH固化的Transbond XT收缩率最低（1.23±0.60%）。当用QTH或HQTH聚合时，三种研究的正畸粘合剂在聚合收缩率方面没有显著差异。
