Youngson C C, Grey N J, Jones J G
Department of Restorative Dentistry, University of Leeds, Leeds Dental School, UK.
J Dent. 1990 Jun;18(3):142-6. doi: 10.1016/0300-5712(90)90053-h.
Premolar teeth with Class II amalgam restorations placed after the application of cavity varnish (Group A), a light cured glass ionomer base (Group B) and 40 per cent polyacrylic acid as a pretreatment agent, followed by unset cermet cement (Group C) were examined for marginal leakage using dye penetration and image analysis. Including amongst the parameters examined were linear leakage length and leakage area, which were found to have no consistent correlation. Group A and C did not generally show significant differences in the parameters examined, whereas Group B exhibited significantly less linear leakage (P less than 0.001), and significantly less leakage area when the stained area was expressed as a percentage of available dentine (P less than 0.001). While allowing some linear leakage, it was found that the light cured glass ionomer base appeared to prevent the dye from entering the dentine. It is concluded that an assessment based solely on the leakage length is inadequate and that some measurement of penetration into dentine should be included in order to fully assess the microleakage potential of a material or technique.
对在应用窝洞封闭剂后进行Ⅱ类银汞合金修复的前磨牙（A组）、光固化玻璃离子垫底的前磨牙（B组）以及用40%聚丙烯酸作为预处理剂、随后使用未凝固金属陶瓷黏固剂的前磨牙（C组），采用染料渗透和图像分析检查边缘渗漏情况。所检查的参数包括线性渗漏长度和渗漏面积，发现它们之间没有一致的相关性。A组和C组在所检查的参数上通常没有显著差异，而B组的线性渗漏明显较少（P小于0.001），并且当染色面积以可用牙本质的百分比表示时，渗漏面积也明显较小（P小于0.001）。虽然允许有一些线性渗漏，但发现光固化玻璃离子垫底似乎能阻止染料进入牙本质。得出的结论是，仅基于渗漏长度的评估是不充分的，为了全面评估一种材料或技术的微渗漏潜力，应包括对染料渗入牙本质情况的一些测量。
