Tooth extraction of a mandibular molar due to severe periapical pathology - endodontic root canal infection. 1) The xray shows severe periapical pathology - tooth infection - around both the mesial and distal tooth roots. 2) This photo shows buccal fenestration around the mesial root following a vertical surgical incision and a periodontal flap. 3) The extracted mesial tooth root with the noted pathology - the tooth abscess - attached. 4) Post-op photo of the tooth extraction site.