Bacterial profile in primary teeth with necrotic pulp and periapical lesions

Brazilian Dental Journal

Léa Assed Bezerra Da Silva²  Paulo Nelson-filho²  Gisele Faria²  Maria Cristina Monteiro De Souza-gugelmin¹  Izabel Yoko Ito¹ 

[1] ,University of São Paulo Faculty of Dentistry of Ribeirão Preto Department of Pediatric Clinics, Preventive and Social DentistryRibeirão Preto SP ,Brazil

关键词: primary teeth;    necrotic pulp;    microorganisms;   

DOI  :  10.1590/S0103-64402006000200012

来源: SciELO

【 摘 要 】

The objective of this study was to evaluate the bacterial profile in root canals of human primary teeth with necrotic pulp and periapical lesions using bacterial culture. A total of 20 primary teeth with necrotic pulp and radiographically visible radiolucent areas in the region of the bone furcation and/or the periapical region were selected. After crown access, 4 sterile absorbent paper points were introduced sequentially into the root canal for collection of material. After 30 s, the paper points were removed and placed in a test tube containing reduced transport fluid (RTF) and were sent for microbiological evaluation. Anaerobic microorganisms were found in 100% of the samples, black-pigmented bacilli in 30%, aerobic microorganisms in 60%, streptococci in 85%, Gram-negative aerobic rods in 15% and staphylococci were not quantified. Mutans streptococci were found in 6 root canals (30%), 5 canals with Streptococcus mutans and 1 canal with Streptococcus mutans and Streptococcus sobrinus. It was concluded that in root canals of human primary teeth with necrotic pulp and periapical lesions, the infection is polymicrobial with predominance of anaerobic microorganisms.

【 授权许可】

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