A 42-year-old male presented with a large radiolucency area above tooth #8. Tooth #8 had a previous root canal and an apicoectomy with an amalgam retrograde >12years ago. In addition, the post appears to be long and close to the root end. Periodontal probing was within normal limits. Previous complaints include sinus discomfort with several sinus infections on and off for 10 years. Past recommended treatment by his ENT included sinus surgery. Clinically, there was a sinus tract present and apical palpation sensitivity.
Diagnosis: Periapical abscess and/or cyst as a result of a failing root canal/apicoectomy.
Treatment: Re-treatment of the Apicoectomy with MTA cement retrograde.
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