PMC3881307_01
A) Preoperative periapical radiograph of a mandibular left first molar showing an unusual extensive furcation perforation, note the radiopaque small piece of amalgam indicating the apical extend of the defect into the bone; B) Postoperative periapical radiograph of the molar showing perforation repair; C) The molar tooth after root canal therapy and coronal amalgam restoration; D) One-year follow-up radiograph showing no radiolucency at the furcal area
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F1
Radiographic examination revealed overextended endodontic access cavity preparation and extensive destruction of pulp-chamber floor (Figure 1A). The location of this small piece was an indicator of wide destruction of the interradicular bone during the preparation of the access cavity (Figure 1A).  After application of temporary restoration (Figure 1B), the patient was dismissed. After taking the postoperative radiography (Figure 1C), the patient was put on a scheduled follow-up. Radiographic examination demonstrated adequate filling and sealing of the perforation site with normal periodontal apparatus (Figure 1D).