Table 3.

Ranking the assessment of the biological test results.

Criterion	Parameter
	Unacceptable Level (Score = 0)	Moderate Level (Score = 1)	Optimal Level (Score = 2)
Direct cytotoxicity, % (relative cell viability in the MTT test)	Bare NiTi control’s level or less (≤72%), high surface cytotoxicity	> Bare NiTi control ≤85% (73–85%), moderate cytotoxicity	>85%, low cytotoxicity
Cell adhesion, % (390 cells/mm2 = 100% adhesion on the bare NiTi surface)	<150% of the bare NiTi control’s level, low adhesion	150–250% of the bare NiTi control’s level, moderate adhesion	>250% of the bare NiTi control’s level, high adhesion
Cell viability, % (relative content of living cells on the sample’s surface)	<85%, non-cytocompatible surface	-	≥85%, cytocompatible surface
NO production, μM/mL, (16 μM/mL- NO production on the bare NiTi surface)	Bare NiTi control’s level or less (<16 μM/mL), low functional activity	>Bare NiTi control, but <150% of the bare NiTi control’s level (16–24 μM/mL), moderate functional activity	>150% of the bare NiTi control’s level (>24 μM/mL). high functional activity