Randomized Clinical Trial of a Self-Adhering Flowable Composite for Class I Restorations: 2-Year Results

Table 2

Modified criteria of United Stated Public Health Services (USPHS criteria) used to evaluate the restorations.

Category	Rating and criteria
Marginal adaptation	A: explorer does not catch; B: explorer catches, no crevice is visible into which explorer will penetrate; C: obvious crevice at margin, enamel, dentin, or base exposed; D: restoration mobile, fractured, or missing
Surface texture	A: no surface porosities or cracks; B: slight surface porosities or cracks; C: obvious surface porosities or cracks
Anatomical form	A: the restoration is continuous with tooth anatomy; B: Slightly under- or overcontoured restoration; marginal ridges slightly undercontoured; occlusal height reduced locally; C: wear beyond the DEJ (clinically unacceptable); D: restoration is missing partially or totally; fracture of tooth structure; showing traumatic occlusion
Marginal discoloration	A: no discoloration anywhere along the margin; B: superficial staining (removable, usually localized); C: deep staining (not removable, generalized)
Color match (immediately after placing the restoration)	A: no shade mismatch in room light in 3-4 seconds; B: perceptible mismatch but clinically acceptable; C: obvious mismatch, esthetically unacceptable