Development of a high-intensity laboratory light-curing unit equipped with a new light source

本研究的目的是开发一种用于间接复合材料聚合的光源和光固化装置。设计了一种用玻璃基板代替金属基板的反射器。反射器的内表面涂有不同的金属氧化物。通过改变镀膜层的组成和厚度，可以改变反射的程度。通过制备电弧管和反射器，构建了金属卤化物光源。接着制作了实验室光固化装置。MIII装置是专门为间接贴面和镶嵌/镶嵌复合材料和不透明树脂的实验室聚合而设计的。该装置装有两盏卤素灯和一盏金属卤化物灯。确定了间接复合材料的固化深度，以评估MIII单元的固化性能。采用氙固化装置（UXS）作为参考装置。特定光照时间后的固化深度如下：曝光周期(s), MIII DC (mm): UXS DC (mm): 20 s=2.00: 1.24。30 s2.13: l.55。60年代= 2.50:l.95。90年代= 3.04:2.26.4。测定间接复合材料（Sinfony）的Knoop硬度值，Visio单元的KHN=24， MIII单元的KHN=40。两个值之间存在显著差异。

The purpose of the current study was to develop a light source as well as a light-curing unit for polymerization of indirect composites.1. A reflector was designed using a glass substructure instead of a metallic one. The inner surface of the reflector was coated with varying metal oxides. By changing the composition and thickness of the coating layers, degree of the reflection could be changed.2. A metal halide light source was constructed after preparation of an arc tube and a reflector. A laboratory light-curing unit was next fabricated. The MIII unit was especially designed for laboratory polymerization of indirect veneering and inlay/onlay composites and opaque resins. The unit was equipped with two halogen lamps and a metal halide lamp.3. Depth of cure of an indirect composite was determined to evaluate curing performance of the MIII unit. A xenon curing unit (UXS) was used as the reference unit. Depth of cure after specific light exposure period was as follows. Exposure period (s), MIII DC (mm): UXS DC (mm): 20 s=2.00:l.24. 30 s2.13:l.55. 60 s=2.50:l.95. 90 s=3.04:2.26.4. Knoop hardness number of an indirect composite (Sinfony) was determined, and the results were KHN=24 for the Visio units, and KHN=40 for the MIII unit. Significant difference was found between the two values.