CAJ | 학술논문

提目的：在研究离体情况下使用染色萃取法研究MTA修复不同厚度根分叉穿孔的封闭效果。方法：将60颗人恒磨牙随机分为3组，每组20颗。每组分别预备其髓底使根分叉剩余厚度分别为3mm ，2mm ，1mm。3个实验组均人工制备根分叉穿孔，每组中15颗牙使用MTA修复底穿孔，5颗作为阳性对照。另5颗牙未制备根分叉穿孔作为阴性对照。使用HIDEX 酶标仪在550 nm检测96孔板的吸光度评价其渗漏性。结果：3组间染料吸光度均有统计学差异（p ＜0．01）．有较厚根分叉的渗漏低于较薄根分叉。根分叉最薄的一组（1mm）渗漏最明显。结论：剩余牙本质壁厚度对MTA修复根分叉穿孔的封闭性有影响。在直接使用MTA修复较薄根分叉穿孔（＜1mm ）时，应充分考虑其预后效果。
제목적：재연구리체정황하사용염색췌취법연구MTA수복불동후도근분차천공적봉폐효과。방법：장60과인항마아수궤분위3조，매조20과。매조분별예비기수저사근분차잉여후도분별위3mm ，2mm ，1mm。3개실험조균인공제비근분차천공，매조중15과아사용MTA수복저천공，5과작위양성대조。령5과아미제비근분차천공작위음성대조。사용HIDEX 매표의재550 nm검측96공판적흡광도평개기삼루성。결과：3조간염료흡광도균유통계학차이（p ＜0．01）．유교후근분차적삼루저우교박근분차。근분차최박적일조（1mm）삼루최명현。결론：잉여아본질벽후도대MTA수복근분차천공적봉폐성유영향。재직접사용MTA수복교박근분차천공（＜1mm ）시，응충분고필기예후효과。
Objectives :This in vitro study aimed to investigate the effect of varying thickness of fucal perforations sealed by MTA using the dye extraction method .Methods :Sixty extracted human molars were randomly divided into three groups with 20 teeth each .Perforations were created in the centre of the pulp chamber floors and the thickness remained 3 mm ,2 mm and 1 mm respectively .Three experimental groups of 15 teeth each were repaired with MTA and 5 teeth with unsealed perforations used as positive controls for every experimental group .Another 5 teeth without perforations were used as negative controls .After dye extraction ,absorbance was measured on a spectrophotometer at 550 nm .Results :Statistically significant difference in dye absorbance was found among the three groups (p < 0 .01) .Leakage in perforations with thicker dentine wall was relatively lower than that in thinner ones .The thinnest furcations (1 mm) repaired with MTA showed the most leakage .Conclusions :The thickness of remaining dentine wall affected the sealing ability of MTA used to repair the perforations .It seems necessary for clinicians to evaluate the prospects of success in the treatment of a thin perforation (less than or equal to 1 mm in thickness ) when repaired with MTA directly .