Table 5.

Percentage viability assessment of cells treated with both regular and strontium-doped nanohydroxyapatite pastes done at different dilutions

Sample concentration (µg/mL)	OD value I	OD value II	OD value III	Average OD	Percentage viability
Control (untreated cells)	0.5535	0.6474	0.5508	0.5839	100.00
Sample code: Regular paste
6.25	0.5415	0.5436	0.5442	0.5431	93.01
12.5	0.5258	0.5289	0.5273	0.5273	90.31
25	0.4621	0.4537	0.4604	0.4587	78.56
50	0.4408	0.4315	0.4326	0.4350	74.49
100	0.4281	0.4257	0.4174	0.4237	72.57
Sample concentration (µg/mL)	OD value I	OD value II	OD value III	Average OD	Percentage viability
Control (untreated cells)	0.6124	0.6307	0.6202	0.6211	100.00
Sample code: SrnHAp paste
6.25	0.603	0.5962	0.6132	0.6041	97.27
12.5	0.5791	0.5845	0.5507	0.5714	92.00
25	0.4892	0.5026	0.5142	0.5020	80.82
50	0.4522	0.4909	0.4977	0.4803	77.33
100	0.4421	0.4804	0.4752	0.4659	75.01

Cytotoxic evaluation: The percentage of growth inhibition was calculated using the formula: . OD: Optical density, SrnHAp: Strontium doped nanohydroxyapatite