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卤素、等离子体和发光二极管固化装置的比较。

Comparison of halogen, plasma and LED curing units.

作者信息

Nomoto Rie, McCabe John F, Hirano Susumu

机构信息

Department of Dental Engineering, Tsurumi University School of Dental Medicine, Yokohama, Japan.

出版信息

Oper Dent. 2004 May-Jun;29(3):287-94.

Abstract

This study evaluated the characteristics of two kinds of recently developed light-curing unit; plasma arc and blue light emitting diodes (LED), in comparison with a conventional tungsten-halogen light-curing unit. The light intensity and spectral distribution of light from these light-curing units, the temperature rise of the bovine enamel surface and the depth of cure of composites exposed to each unit were investigated. The light intensity and depth of cure were determined according to ISO standards. The spectral distributions of emitted light were measured using a spectro-radiometer. The temperature increase induced by irradiation was measured by using a thermocouple. Generally, light intensities in the range 400-515 nm emitted from the plasma arc were greater than those from other types. Light in the UV-A region was emitted from some plasma arc units. The required irradiation times were six to nine seconds for the plasma arc units and 40 to 60 seconds for the LED units to create a depth of cure equal to that produced by the tungsten-halogen light with 20 seconds of irradiation. The temperature increased by increasing the irradiation time for every light-curing unit. The temperature increases were 15 degrees C to 60 degrees C for plasma arc units, around 15 degrees C for a conventional halogen unit and under 10 degrees C for LED units. Both the plasma arc and LED units required longer irradiation times than those recommended by their respective manufacturers. Clinicians should be aware of potential thermal rise and UV-A hazard when using plasma arc units.

摘要

本研究评估了两种最近开发的光固化机(等离子弧光固化机和蓝光发光二极管(LED)光固化机)的特性,并与传统的钨卤光固化机进行了比较。研究了这些光固化机发出的光的光强和光谱分布、牛牙釉质表面的温度升高以及暴露于各光固化机下的复合材料的固化深度。光强和固化深度根据ISO标准测定。使用光谱辐射计测量发射光的光谱分布。使用热电偶测量照射引起的温度升高。一般来说,等离子弧发出的400 - 515nm范围内的光强大于其他类型的光强。一些等离子弧光固化机发出UV - A区域的光。等离子弧光固化机达到与钨卤光固化机照射20秒产生的相同固化深度所需的照射时间为6至9秒,LED光固化机则为40至60秒。每种光固化机的温度都随着照射时间的增加而升高。等离子弧光固化机的温度升高为15摄氏度至60摄氏度,传统卤素光固化机约为15摄氏度,LED光固化机低于10摄氏度。等离子弧光固化机和LED光固化机所需的照射时间均比各自制造商推荐的时间长。临床医生在使用等离子弧光固化机时应注意潜在的热升高和UV - A危害。

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