An In Vitro Assessment of the Acid Resistance Characteristics of Nanohydroxyapatite/Silica Biocomposite Synthesized Using Mechanochemistry

Table 1

Elemental analysis of mineral loss in tooth enamel samples.

Element (weight in %)	Sample groups
	Unexposed tooth	Exposed to citric acid alone	MSS	nHAp	MSN@nHAp
Carbon (C)	27.48%	8.54%	13.61%	32.08	28.93
Calcium (Ca)	20.95%	33.55%	30.48%	21.91	21.77
Oxygen (O)	39.42%	42.59%	40.38%	34.41%	35.35
Phosphorus (P)	11.20%	14.33%	14.26%	10.29%	10.71%