Correlation between clinical symptoms and microorganisms isolated from root canals of teeth with periapical pathosis.

Periapical pathosis cases were classified and the effect of bacteria on clinical symptoms was examined. A positive correlation between bacterial growth and clinical symptoms was found. Peptococcus magnus and Bacteroides species were commonly found in clinically acute cases, while oral streptococci and enteric bacteria were frequently isolated from clinically asymptomatic cases. and Goodman (8) was first attempted in order to classify the cases of periapical pathosis. However, not all cases were distinctly diagnosed. Therefore, we tried to classift/ periapical pathosis based on the combination of three representative symptoms, i.e. spontaneous pain, percussion pain, and exudation. Comparative studies of the distribution of bacteria isolated from each group were carried out.