Endodontic and Periodontal Treatment of a Two‐Rooted Maxillary Lateral Incisor With a Type III Palatoradicular Groove: A Case Report With 2‐Year Follow‐Up

Introduction: A palatoradicular groove (PRG) is a developmental anomaly that usually starts from the central fossa, crosses the cingulum, and extends apically onto the root surfaces at varying degrees. It can lead to both periodontal and endodontic issues in clinical practice. Therefore, early diagnosis and treatment of PRGs are crucial for improving patients' prognosis. Case Report: A 29-year-old woman complained of discomfort around the upper left lateral incisor. Three-dimensional constructed CBCT images clearly showed that #22 had a supernumerary root. Tooth #22 was diagnosed as having an endodontic-periodontal lesion caused by a Type III PRG and an additional root. This case report presents a case of endodontic-periodontal lesions caused by a PRG of #22 with two roots, in which root canal treatment and surgical periodontal procedures provided good outcomes. Conclusion: In-depth knowledge of anatomical variations of the morphology of the root canal system of PRG is necessary for accurate diagnosis and successful treatment. CBCT showed accurate anatomical details, which were helpful for planning the treatment of the tooth with a PRG.