Treatment options for the radicular lingual groove: a review and discussion.

The radicular lingual groove (RLG) is a developmental anomaly in which an infolding of the inner enamel epithelium and Hertwig's epithelial root sheath create a groove that passes from the cingulum of maxillary incisors apically onto the root. Radicular lingual grooves can create periodontal and pulpal pathology, but they may be difficult to identify as an etiological factor. This article identifies the diagnostic and treatment modalities for the various forms of RLGs and describes the prognosis that can be anticipated with each treatment modality.