ABSTRACT
Following through cleaning and shaping, the root canal system is obturated to: • Prevent the ingress of micro-organisms into the root canal system by coronal leakage. • Prevent the multiplication of microorganisms remaining in the root canal system. • Prevent percolation of tissue fluid into pulp space via apical foramina/lateral canals or
furcal canals. This fluid could act as a substrate for any viable bacteria remaining following root canal treatment.
