Bacterial leakage in root canals filled with calcium hydroxide paste associated with different vehicles

Brazilian Dental Journal

Cristiana Murad¹  Luiz Fernando Fariniuk²  Sandra Fidel¹  Rivail Antonio Sergio Fidel¹  Luciana Moura Sassone¹ 

[1] ,State University of Rio de Janeiro ProClin Department Rio de Janeiro RJ ,Brazil

关键词: bacterial leakage;    calcium hydroxide;    vehicles;   

DOI  :  10.1590/S0103-64402008000300011

来源: SciELO

【 摘 要 】

This in vitro study evaluated, using a bacterial leakage model, whether intracanal medication with calcium hydroxide [Ca(OH)2]-based pastes prepared with different vehicles, has inhibitory effect on corono-apical leakage of bacteria. Forty instrumented human canines were dressed with Ca(OH)2 p.a. associated with: G1= distilled water; G2= polyethylene glycol (PG); G3= PG + CMCP; and G4= glycerin. Five teeth with intact crowns served as negative controls and 5 instrumented teeth without temporary dressing served as positive controls. All teeth were mounted in a 2-chamber apparatus and then exposed to human saliva for 63 days. Leakage was recorded when turbidity was observed in the lower chamber. Fifty percent of the samples of G1 and G2, 10% of G3 and 80% of G4 were fully contaminated after 9 weeks. Statistically significant differences were observed with paired comparisons G3 and G4 (p=0.0069), with G3 achieving better seal against bacterial leakage than G4.

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