Table 1:The USPHS rating criteria

Category	Restorative Score	Criteria used in Rating Restoration
Retention	Alpha (A)Bravo (B)Charlie (C)	Restoration is fully intactPartial loss of restorationTotal loss of restoration
Marginal discoloration	Alpha (A)Bravo (B)Charlie (C)	No discoloration anywhere on the margin between the restoration and the tooth margin.The discoloration has not penetrated in a pulpal direction along the margin.The discoloration has penetrated in a pulpal direction along the margin
Marginal adaptation	Alpha (A)Bravo (B)Charlie (C)	The restoration appears to adapt closely to the tooth along the periphery of the abrasive wear restoration. An explorer does not catch when drawn across the margin, or when it does catch, it will catch only in one direction and no crevice is visible. The explorer catches and there is visible evidence of a crevice into which the explorer will penetrate. However, neither dentine nor base is visibleThe explorer penetrates into a crevice that is of such depth that dentine or base is exposed Bravo (B)
Abrasive wear resistance	Alpha (A)Bravo (B)Charlie (C)	Completely intact with no loss of contourSlight contour loss, replacement is unnecessaryExtensive contour loss requiring replacement
Post operation sensitivity	Alpha (A)Bravo (B) Charlie (C)	Post operative sensitivity entirely absentSlight sensitivity to temperature change and / or probe explorationSevere sensitivity to temperature change and / or probe exploration
Secondary Caries	Alpha (A)Charlie (C)	No Caries presentCaries present