2018-11-052018-11-052009VASCONCELOS, Karla de Faria et al. Relação entre a microbiota do canal radicular de dentes traumatizados e o teste de percussão vertical. Robrac: revista odontologica do Brasil Central, Goiânia, v. 18, n. 47, p. 34-40, 2009.1981-3708http://repositorio.bc.ufg.br/handle/ri/16339This study aimed to evaluate the microbiota of root canals of 20 human permanent traumatized tee- th with crown intact and clinical diagnosis of pulpal necrosis and relate the response to vertical percussion test with the presence of microorganisms in these teeth. The microbiological sampling was performed with autoclaved absorbent paper cones and determining the number of colony-forming units (cfu) of bacteria was performed by seeding the material collected on chocolate Agar (count of total bacteria), mitis salivarius agar (count of buccal streptococcus) and agar SB20 (counts of mutans streptococcus of the group). The Linear Regression test and Diagnostics Analysis revealed that in only 15% of the samples was not detected the microbial development. The time of dental trauma to the endodontic intervention ranged from 15 days to 31 months, with the passage of time only was statistically significant (p = 0.047) on the number of buccal strepto- coccus isolated in the root canal. There is an increase that number as time was also higher. The vertical per- cussion test showed high sensitivity (80%) in the detection of microorganisms in root canals of traumatized teeth. Basing on these results we can conclude that: 85% of teeth showed microorganisms in root canal with crown intact, the clinical diagnosis of pulpal necrosis was achieved in 70% of the teeth, up to 3 months and the positive response to the vertical percussion test was associated with pulpal necrosis with the presence of microorganisms.porAcesso AbertoTraumatismoDiagnósticoMicrobiologiaTraumaMicrobiologyDiagnosisArtigo