Influence of Monowave and Polywave LED Unites on G-Aenial Resin Composites’ Polymerization: An In Vitro Study

IF 0.6 Q4 DENTISTRY, ORAL SURGERY & MEDICINE

Dental Hypotheses Pub Date : 2022-01-01 DOI:10.4103/denthyp.denthyp_156_21

Azadeh Ghaemi, Milad Molayi, Rayan Chaharmahali

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Abstract

Objectives: Trimethylbenzoyldiphenylphosphine oxide and phenylpropanedione photoinitiator components in resin composites have been used widely due to their white color. However, it seems that there are some limitations in the required polymerization initiator wavelength. This study aimed to evaluate the polywave and monowave light-activating devices (LEDs) on polymerization and shrinkage strain of two dental composites with different photoinitiator systems. Methods: In this experimental study, 24 samples were prepared in two groups, including G-Aenial A2 and bleach composites. Each group was divided into two subgroups: one cured by monowave LED unit and the other by polywave device. Then shrinkage strain of samples was evaluated using bonded disk technique. Results: Results showed the shrinkage strain of A2 and bleach composites using PW device was significantly greater than MW device. In addition, the A2 composite shrinkage action polymerized with MW device was significantly lower than shrinkage action of A2 and bleach composite using PW machine. Conclusion: The findings of this study revealed that polywave LEDs were more beneficial for the polymerization of resin composites.

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单波和多波LED单元对G-Aenial树脂复合材料聚合的影响：体外研究

目的：三甲基苯甲酰二苯基氧化膦和苯基丙二酮光引发剂组分因其白色而在树脂复合材料中得到广泛应用。然而，似乎在所需的聚合引发剂波长方面存在一些限制。本研究旨在评估多波和单波光活化器件（LED）对两种不同光引发剂体系的牙科复合材料的聚合和收缩应变的影响。方法：在本实验研究中，将24个样品分为两组，包括G-Aenial A2和漂白复合材料。每组分为两个亚组：一组通过单波LED单元固化，另一组通过多波器件固化。然后利用粘盘技术对样品的收缩应变进行了评估。结果：使用PW装置的A2和漂白剂复合材料的收缩应变明显大于MW装置的收缩应变。此外，用MW装置聚合的A2复合材料的收缩作用显著低于用PW机聚合的A2和漂白复合材料的缩水作用。结论：本研究结果表明，多波LED更有利于树脂复合材料的聚合。

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