Miller Classification of Gingival Recession

	Symptoms	Treatment	Success
Class I	Recession that does not extend to the mucogingival junction with no periodontal bone loss in the interdental areas	Complete root coverage is achievable	100%
Class II	Recession that extends to or beyond the mucovingival junction, with no interdental bone loss	Complete root coverage is achievable	100%
Class III	Recession that extends to or beyond the mucogingival junction, with some periodontal attachment loss in the interdental area or malpositioning of the teeth	Only partial root coverage possible to the height of the contour of interproximal tissue	50-70%
Class IV	Recession that extends to or beyond the mucogingival junction, with severe bone and/or soft-tissue loss in the interdental area and/or severe malpositioning of the teeth	Root coverage is unpredictable and requires adjunctive treatment (ie orthodontics)	<10%

References