From: Clinical observation of the tooth surface during air-drying of self-etching primer under 3D video microscope
Anterior (n)
Premolar (n)
Molar (n)
Upper
27.3 ± 14.6 (16)b
38.3 ± 15.9 (14)ab
43.5 ± 13.5 (16)ab
Lower
26.7 ± 8.5 (3)ab
39.2 ± 13.7 (13)ab
48.1 ± 21.7 (38)a