What is the classification of gingival recession with no loss of interproximal clinical attachment level (CAL) and an invisible interproximal cementoenamel junction (CEJ)?

The classification in question pertains to the classification of gingival recession, which is defined by specific criteria. In this case, the type designated as RT1 refers to gingival recession where there is no loss of interproximal clinical attachment level (CAL) and the interproximal cementoenamel junction (CEJ) is not visible. This means that the loss of gingival tissue does not extend to the attachment level of the adjacent teeth and maintains the integrity of the interproximal attachment.

RT1 is characterized by a situation where the recession occurs only on the facial or buccal aspect of the teeth, and because the interproximal area is untouched (with CAL not lost), the clinical implications point towards a favorable prognosis for periodontal treatment. The condition of not being able to see the interproximal CEJ suggests that the buccal recession does not extend beyond the marginal tissue level, thus representing a less severe clinical scenario.

Other options in the classification may consider scenarios where there is loss of interproximal CAL or other factors that complicate the gingival health and treatment response. Hence, RT1 is a clear identification of minimal periodontal involvement, making it an essential foundation for understanding and managing periodontal conditions effectively.