Treatment of a rare retrograde lesion -A case report

Background: The retrograde periodontal lesion is a very rare condition of endodontic origin with secondary periodontal involvement. The presence of a concomitant palato-radicular groove (PRG) on a maxillary lateral incisor is not a common developmental anomaly. We report on the successful treatment of this condition through endodontic and periodontal therapy. Methods: This case report describes a pulpal periodontal condition occurring on a left maxillary lateral incisor in a 30-year-old male, which was successfully treated by conventional endodontic therapy followed by periodontal treatment which included odontoplasty and apical flap surgery with bone grafting. Results: A 2-year follow-up, which included a radiographic evaluation and surgical re-entry, revealed excellent healing with complete bone fill around the involved defect and total resolution of the lesion. Conclusion: The basis of our successful treatment was an accurate and timely diagnosis and elimination of all inflammatory irritants and other contributory factors. It is important for all clinicians to be aware of the existence of this abnormality