Sutimuntanakul S, Worayoskowit W, Mangkornkarn C
Department of Operative Dentistry, Mahidol University, 6 Yothi Street, Rajathewee, Bangkok 10400, Thailand.
J Endod. 2000 Aug;26(8):444-6. doi: 10.1097/00004770-200008000-00003.
The sealing ability of various retrofilling materials was compared. The root canals of 85 single-rooted teeth were cleansed and obturated with gutta-percha without sealer using lateral condensation. The apical 3 mm of the roots were resected and divided into positive control, negative control, and five experimental groups. The experimental teeth received root-end cavity preparation to 3 mm depth using an ultrasonic retroprep tip. The retrocavities were dried and divided into five groups to receive the following materials: amalgam with varnish, amalgam with Clearfil Liner Bond II, thermoplasticized gutta-percha (TGP) with sealer, Ketac-fil, and Super-EBA. After immersion in India ink for 7 days, the roots were demineralized, cleared, and evaluated for dye leakage under a stereomicroscope. Statistical analysis showed that Super-EBA, Ketac-fil, and TGP with sealer demonstrated less leakage than amalgam with varnish and amalgam with Clearfil Liner Bond II (p < 0.05). Super-EBA also leaked significantly less than Ketac-fil or TGP sealer (p < 0.05). No significant difference was found between Ketac-fil and TGP or between the two groups filled with amalgam (p > 0.05).
比较了各种根充材料的封闭能力。对85颗单根牙的根管进行清理，采用侧向加压法用牙胶尖充填，不使用封闭剂。将牙根根尖3mm处切除，分为阳性对照组、阴性对照组和五个实验组。实验牙使用超声倒预备头将根尖倒预备洞深至3mm。将倒预备洞干燥后分为五组，分别充填以下材料：汞合金加清漆、汞合金加Clearfil Liner Bond II、热塑牙胶（TGP）加封闭剂、Ketac-fil和Super-EBA。在印度墨水中浸泡7天后，将牙根脱矿、透明处理，并在体视显微镜下评估染料渗漏情况。统计分析表明，Super-EBA、Ketac-fil和TGP加封闭剂的染料渗漏比汞合金加清漆和汞合金加Clearfil Liner Bond II少（p<0.05）。Super-EBA的渗漏也明显少于Ketac-fil或TGP封闭剂（p<0.05）。Ketac-fil和TGP之间以及两组汞合金充填组之间未发现显著差异（p>0.05）。
