Two differing evaluation criteria for complete root coverage (CRC) were used to compare incidence of CRC after root coverage procedures. Clinical records of 363 patients (386 single recessions) treated between 1984 and 2012 were screened. CRC was assessed 1 year after surgery using two separate evaluation criteria: CRC1, in which the gingival margin was at or above the cementoenamel junction (CEJ), measured using a periodontal probe directly on patients by a single examiner; and CRC2, in which the gingival margin was above the CEJ, rendering it completely invisible based on a visual assessment of high-magnification digitalized images by two calibrated examiners. Descriptive and inferential statistics were performed. The k statistic was also calculated to test the agreement between the two examiners. Four treatment groups were identified: free gingival graft (FGG; n = 116), coronally advanced flap (CAF; n = 107), CAF + connective tissue graft (CTG; n = 131) and guided tissue regeneration (GTR; n = 32). The overall difference between the proportion of CRC1 and CRC2 was statistically significant (P < .0001), as were the intragroup differences for FGG (P = .0002), CAF (P = .0009), and CTG (P = .0002). Treatment of gingival recessions should only be deemed completely successful when root coverage is associated with a gingival margin and a crevice probing depth that is coronal to the CEJ. When root coverage is regarded as complete with gingival margin located at the level of CEJ, it does not represent complete treatment success.
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