Young K C, Cummings A, Main C, Gillespie F C, Stephen K W
J Oral Rehabil. 1978 Apr;5(2):187-95. doi: 10.1111/j.1365-2842.1978.tb01212.x.
The hardness of five fissure sealants was measured using a Wallace Microhardness Tester and found to continue to increase long after the initial setting. The effect of the intensity of radiation and exposure time on the setting of two u.v. activated sealants (Nuva-seal and Alphaseal) was also investigated, with higher intensities producing both a more rapid set and greater final hardness. Alphaseal required longer exposure at a given intensity of u.v. radiation to achieve the same hardness as Nuva-seal, and displayed relatively slow setting in depth, which could give rise to incomplete polymerization during clinical use, resulting in early sealant loss. Thus special care must be taken to ensure that Alphaseal receives an adequate exposure to u.v. radiation, and sources which are suitable for setting Nuva-seal may not be sufficiently powerful when applying Alphaseal.
使用华莱士显微硬度计测量了五种窝沟封闭剂的硬度，发现其在初始固化后很长时间内仍持续增加。还研究了辐射强度和照射时间对两种紫外线固化封闭剂（Nuva-seal和Alphaseal）固化的影响，较高的强度会使固化更快且最终硬度更大。在给定的紫外线辐射强度下，Alphaseal需要更长的照射时间才能达到与Nuva-seal相同的硬度，并且在深度上显示出相对较慢的固化速度，这可能导致临床使用期间聚合不完全，从而导致封闭剂早期脱落。因此，必须特别注意确保Alphaseal充分暴露于紫外线辐射下，并且在应用Alphaseal时，适用于固化Nuva-seal的光源可能不够强大。
