Fowler C S, Swartz M L, Moore B K
Indiana University School of Dentistry, Department of Dental Materials, Indianapolis 46202-5186.
Oper Dent. 1994 Mar-Apr;19(2):47-52.
This study evaluated (1) the effect of known reductions in the output of curing lights on the depth of cure of various resins as determined by hardness measurements, and (2) the ability of the clinician to detect reduced light output by use of an explorer to compare the hardness of the top and bottom surfaces of resin specimens. Curing light output was reduced stepwise from 10 to 70% with neutral density filters. Hardness values indicated polymerization of the top surface to be generally unaffected by light blockage. Bottom surfaces were greatly affected: more with a 30-second than a 60-second cure time. Three clinicians utilized an explorer to compare the tops and bottoms of specimens of known hardness. Evaluators were unable to routinely detect differences of less than 20 to 30 Barcol numbers. The data indicate that a light meter is a more efficacious means of monitoring curing light performance than is a tactile test of resin surface hardness.
(1) 通过硬度测量确定的，已知固化灯输出量降低对各种树脂固化深度的影响；以及(2) 临床医生使用探针比较树脂标本顶面和底面硬度来检测光输出降低的能力。使用中性密度滤光片将固化灯输出量逐步从10%降低到70%。硬度值表明顶面的聚合通常不受光阻挡的影响。底面受到很大影响：固化30秒比固化60秒时影响更大。三名临床医生使用探针比较已知硬度标本的顶面和底面。评估者无法常规检测出小于20至30巴氏硬度单位的差异。数据表明，与对树脂表面硬度进行触觉测试相比，光度计是监测固化灯性能更有效的手段。
