Patient of another clinic where he underwent endodontic treatment of tooth 36 came with pain complaint in this tooth. The reason a broken endodontic intrument (root canal filler) got stuck in the medial canal which hampered properly filling the root canal. Some years later, it led to periodontitis. 1 – destruction of the bone tissue due to an incomplete treatment of the root canal. 2 - spiral fragment of an intratubular tool.