Miller, P. A classification of marginal tissue recession. Int. J. Perio. Res. Dent. 2:9, 1985.

A classification of marginal tissue recession

• Class I - marginal tissue recession which does not extend to the MGJ. There is no periodontal bone loss (bone or soft tissue) in the interdental area, and 100% root coverage anticipated.
• Class II - marginal tissue recession which extend to of beyond the MGJ. There is no periodontal bone loss (bone or soft tissue) in the interdental area, and 100% root coverage anticipated.
• Class III - marginal tissue recession which extend to of beyond the MGJ. There is periodontal bone loss (bone or soft tissue) in the interdental area, or there is malpositioning of the teeth which prevents the attempting of 100% root coverage. Partial root coverage anticipated.
• Class IV - marginal tissue recession which extend to of beyond the MGJ. There is periodontal bone loss (bone or soft tissue) in the interdental area, or there is malpositioning of the teeth is so severe that root coverage cannot be anticipated.
• Root Coverage is considered 100% if the marginal tissue after complete healing is at the CEJ, and the sulcus depth is 2 mm or less, and there is no bleeding on probing.

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