{"references": ["1. Atkinson SR: The permanent maxillary lateral incisor. American Journal of Orthodontist & Oral Surgery, 1943;29(12):685-698.", "2. Ballal NV, Jothi V, Bhat KS, Bhat KM: Salvaging a tooth with a deep palatogingival groove: An endo-perio treatment. A case report. International Endodontic Journal, 2007;40(10):808-817", "3. Bromell I, Fischelis P. Anatomy and Histology of the mouth and teeth. Edn. 5; Blakiston's Son and Co. Philadelphia. 1917;p.115 (Cited from Journal of the Society of Perodontists & Implantologists of Kerala, 2009, Vol. 3(1):41).", "4. Cecilia MS, Lara VS, de Moraes IG: The palate-gingival groove. A cause of failure in root canal treatment. Oral Surgery Oral Medicine Oral Pathology, Oral Radiology and Endodontics, 1998;85(1):94-98.", "5. Everett FG, Kramer GM: The distolingual groove in the maxillary lateral incisor, a periodontal hazard. Journal of Periodontology, 1972; 43:352-361.", "6. Hans MK, Srinivas RS, Shetty SB: Management of lateral incisor with palatal radicular groove. Indian Journal of Dental Research, 2010;21(2):306-308", "7. Kerezoudis NP, Siskos GJ, Tsatsas V: Bilateral buccal radicular groove in maxillary incisor: Case Report. International Endodontic Journal, 2003;36(12):898-906", "8. Lara VS, Consolaro A, Bruce ES: Macroscopic and microscopic analysis of the paalto-gingival groove. Journal of Endodontics, 2000;26(6):345-350.", "9. Lee KW, Lee EC, Poon KY: Palato-gingival groove in maxillary incisors. British Dental Journal, 1968;124:14- 18.", "10. Robison SF, Cooley RL: Palatogingival groove lesions: recognition and treatment. General Dentistry, 1988;36(4):340-342.", "11. Walker RT, Jones GJC: The palato-gingival groove and pulpitis: A case report. International Endodontic Journal, 1983;16(1):33-34", "12. Zeisz RC, Nuckolin J: Dental Anatomy.St.Louis, CV. Mosby Co.1949;p.65."]}

Morphological defects occurring in dental structure can be sometimes predisposing factors for the onset of inflammatory processes in the periodontal and/or pulpal tissues. Palatogingival groove is one such defect, most frequently found on the lingual surface of maxillary laterals. Recognition of such a defect is critical and important, especially because of its diagnostic complexity and its further consequences. This case report discusses about the diagnosis and management of such a defect that predisposed the maxillary lateral incisor to periodontal defect leading to retrograde pulpitis.