The effect of left bacteria in the root canal on prognosis of the root canal therapy
He, J.-m.; Bian, Z.; Fan, M.-w.; Fan, B.
Hua Xi Kou Qiang Yi Xue Za Zhi 22(3): 198-200
2004
ISSN/ISBN: 1000-1182 PMID: 15293462 Document Number: 567606
To study the effect of the left bacteria on the root canal therapy. 50 single-rooted teeth with chronic apical periodontitis were divided into two groups, one was instrumented with step-back technique and 2.5%NaOCl ultrasonic irrigation for 3 min, then filled with Thermafil. Samples were taken after instrumentation to culture. The other was treated with traditional RCT at three visits. In 24 months the apical radiolucency were greatly reduced in all cases. There weren't significant relationship among the postoperative pain and the left bacteria, the degree of the obturation or the pre-operative symptoms (P > 0.05). The effect of left bacteria in root canal filled with Thermafil wasn't observed.