O'Connor R P, Hutter J W, Roahen J O
Endodontics Department, Naval Dental School, National Naval Dental Center, Bethesda, MD 20889-5602, USA.
J Endod. 1995 Feb;21(2):74-8. doi: 10.1016/S0099-2399(06)81099-X.
An in vitro dye leakage study was conducted to test the root-end sealing ability of amalgam with varnish or Super-EBA using two root-end preparation techniques and surgical microscopy. Sixty-four single-rooted teeth were instrumented and obturated with gutta-percha. Teeth were randomly placed into four groups. Two groups received perpendicular root-end resections, 3-mm-deep ultrasonic root-end preparations, and either amalgam with varnish or Super-EBA root-end fillings. The other two groups received beveled root-end resections, 3-mm-deep micro-handpiece preparations, and either amalgam with varnish or Super-EBA. All root-end procedures were performed at x5 to x8 magnification. Micro-leakage was assessed at 4 months using methylene blue dye and a passive hydrostatic pressure technique. Statistical analysis showed that, regardless of technique, Super-EBA leaked significantly less than amalgam with varnish. There was no significant difference between the two root-end resection and preparation techniques.
进行了一项体外染料渗漏研究，以使用两种根尖制备技术和手术显微镜测试汞合金与清漆或Super-EBA的根尖封闭能力。六十四颗单根牙进行了预备并用牙胶尖充填。牙齿被随机分为四组。两组接受垂直根尖切除术、3毫米深的超声根尖制备，以及汞合金与清漆或Super-EBA根尖充填。另外两组接受斜面根尖切除术、3毫米深的微型机头制备，以及汞合金与清漆或Super-EBA。所有根尖手术均在5倍至8倍放大倍数下进行。在4个月时使用亚甲蓝染料和被动静水压力技术评估微渗漏。统计分析表明，无论采用何种技术，Super-EBA的渗漏均明显少于汞合金与清漆。两种根尖切除和制备技术之间无显著差异。
