Results: There were 31.2% cocci in root canal and 30% in periodontal pocket, rods were 22.5% in root canal and 21% in periodontal pocket, spirochetes were 4.3% in root canal and 3% in periodontal pocket, others were 42% in root canals and 46% in periodontal pockets. The difference was non- significant (P>0.05). There was predominance of Streptococcus (20%) in root canals and periodontal pocket (18%). The difference was non- significant (P>0.05).

Conclusion: Authors concluded that the occurrence of micro-organisms common to both sites root canal and periodontal pockets. Thus periodontal pocket may be a possible source of root canal infections.