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Table 2 Mean (standard deviation) KHN values for the various materials after conditioning

From: Degradation effects of dietary solvents on microhardness and inorganic elements of computer-aided design/computer-aided manufacturing dental composites

Dietary solvents

Mean KHN values (kg/mm2)

FZ

CM

LU

CS

VE

Air (control)

43.9(1.5)

46.6(2.1)

50.5(0.9)

44.2(2.7)

79.2(3.4)

Distilled water

43.7(2.9)

46.5(2.6)

50.1(2.8)

44.1(2.4)

79.1(3.5)

0.02 N Citric acid

42.5(2.3)

46.5(3.5)

49.7(0.7)

43.9(1.7)

77.5(3.5)

0.02 N Lactic acid

40.2(3.4)

46.2(1.8)

48.9(2.0)

43.5(2.3)

77.4(2.7)

50% Ethanol-water

39.7(2.7)

41.7(2.7)

49.5(2.4)

40.1(2.8)

64.7(3.2)

  1. Abbreviations: CM: Shofu Ceramage; CS: Cerasmart; FZ: Filtek Z350 XT; LU: Lava Ultimate; VE: Vita Enamic; KHN: Knoop hardness