EXPERIMENTAL INDUCED ANACHORESIS IN DENTAL PERIAPICAL REGION OF TEETH AFTER ROOT CANAL FILLING. STUDY IN ENDEMIC REGION FOR LEISHMANIOSIS. / Indução experimental de anacorese no periápice de dentes após obturação dos canais. Estudo em cães em região geográfica endêmica para Leishmaniose

AUTOR(ES)
DATA DE PUBLICAÇÃO

2001

RESUMO

Anachoresis is that phenomenon by which blood-borne bacteria, dyes, pigments, metallic substances, foreign proteins and other materials are attracted to, and fixed in, circumscribed areas of inflammation. This study evaluated the occurrence of anachoresis in the periapical region. 104 roots from four dogs where endodontically treated and root canals filled with zincoxide-eugenol cement. 50% where filled until the CDC limit and the others overfilled. 120 days after root canal treatment, a experimental bacteremia was induced by means of intravenous inoculation of a Streptococcus pyogenes culture containing 5.106CFU/ml. Inoculated bacteria presented several antimicrobial resistance markers. The euthanasia of dogs was conducted 48 hours and 30 days after the bacteremia. Microbial processing of periapical tissues evidenced the presence of inoculated microorganisms at 48 hours specimens but not at 30 days samples. Microscopic analysis had evidenced similarity between bacterias of the tissues and the inoculated strain in 46,88% of the specimens after 48 hours and other microorganisms in 28,12% after 30 days. Some of these cocci have shown morphological similarities to the inoculated bacterias. They were localized in the cementary canal, apical delta, lateral and apical periodontium in both periods of time. Leishmania sp. was also detected in two dogs. Endodontically treated periapices seemed to be propitious for anachoresis and it was not any relation between the phenomena and root canal filling level. Microorganisms might persist in periapical region and/or collaborate to this tissues colonization by other more sensitive species. The experimental pattern seemed to be adequate for the a nachoresis study

ASSUNTO(S)

cães obturação do canal radicular leishmaniose mucocutânea animal

ACESSO AO ARTIGO

Documentos Relacionados