Influence of light irradiation on Vickers hardness of dual-cure cement polymerized under restorations

本研究通过测量维氏显微硬度（Hv）来评价固化剂材料的透光率、离光照射区域的距离以及光照射后经过的时间对双固化水泥（Panavia F2.0）的聚合度的影响。在本研究范围内，得出以下结论：1.自酸蚀底漆的应用还改善了双固化水泥在被漂白覆盖的区域中的聚合。在临床实践中使用双固化树脂粘固剂将修复体安装到基牙上时，最好对边缘区域进行额外的光照射，以加速粘固剂的聚合。强烈建议在安装修复体的当天保持粘合界面上的最小应力。

This study evaluated the influence of the light transmittance of restoratives materials, the distance from the light irradiationarea, and the lapsed time after light irradiation on the degree of polymerization of dual-cure cement (Panavia F2.0) which is placed to the area covered with restoratives by measuring Vickers micro hardness (Hv). Within the limitations of this study, the following conclusionswere drawn:1. Application of the self-etching primer also improved the polymerization of dual-cure cement in areas covered by the restoration.2. When installing a restoration to the abutment tooth using dual-cure resin cement in a clinical practice, an additional light irradiation to the marginal area is preferable to accelerate the polymerization of the cement.3. It is highly recommended to keep to a minimum stresses on the bonding interface the day that a prosthetic restoration is installed.