Conflict of interest:The authors certify that there is no conflict of interest concerning the contents of the study. This study has been self-supported by the authors.Key words: gingival recession, diagnosis, periodontal disease, classification, aesthetics, clinical attachment level, root coverage. Running title: Interproximal CAL for gingival recessions Clinical relevance Scientific rationale for the studyNo information concerning the reliability of classifications of gingival recessions is currently available and there is no general consensus on the use of a specific system. In addition, the prediction of the gingival margin position following root coverage is a controversial issue. Principal findingsUsing the level of interproximal clinical attachment as identification criterion the proposed classification of gingival recessions showed an ICC= 0.86 (almost perfect agreement) among different examiners. Furthermore, the proposed classification was predictive of the final root coverage outcomes at the 6-month follow-up. Practical implicationsA classification system of gingival recessions based on the interproximal CAL may aid clinicians for a reliable categorization of defects and an effective prediction of treatment outcomes.

Both treatments can provide CRC in single gingival recession with inter-dental CAL loss. The application of CTG under CAF resulted in predictable CRC when inter-dental CAL was ≤ 3 mm.

Connective tissue graft under CAF results in increased probability of CRC only at sites with thin baseline gingiva. CAF alone is associated with similar clinical outcomes and better aesthetics at sites with thick baseline gingiva.

FibReORS was similarly effective as ORS for PD reduction with less final Rec and patient morbidity.