Study of Anaerobic Infections in Necrotic Teeth (Nonvital) Having Acute and Chronic Clinical Symptoms

Anaerobic microorganisms, particularly bacteroides, play an important role in causing Pulp and preapical diseases that lead to chronic abscess. We aimed at studying anaerobic infections in necrotic teeth having chronic clinical symptoms.

We examined 28 necrotic teeth of 28 patients for the purpose of anaerobic culture. Fifteen cases with acute clinical symptoms and 13 ones with chronic clinical symptoms. A Total of 38 Root canals from 28 teeth were subjected for examination and sampling. The samples were cultured on Tayo glycolate medium, sent to laboratory and used the methods of Jar and Gas pak for identification of bacteria.

The results indicate that 76% of isolated bacteria from necrotic canals are obligate anaerobes and 24% are facultative anaerobes. The most common isolated microorganisms are peptostreptococci, fusobacterium and bacteroides. When preapical problems are demonstrated by radiography, the same genera are found.

These results are in agreement with the results of other researchers and it has been determined that bacteroids play an important role in destroying the necrotic teeth's bone. Anaerobic bacteria causing dental infections are less identified and diagnosed; therefore, dentist and clinical Laboratories should take this into account.