Mandibular left first molar demonstrates a relatively large apical radiolucency
encompassing both the mesial and distal roots along with furcation involvement.
Periodontal probing depths were all within normal limits. The tooth did not respond
to thermal (cold) testing and both percussion and palpation elicited normal responses.
There was a draining sinus tract on the mid-facial of the attached gingiva which was
traced with a gutta-percha cone. There was recurrent caries around the distal margin
of the crown. Diagnosis: pulp necrosis; chronic apical abscess. Treatment is crown
removal, non-surgical endodontic treatment and placement of a new crown.