The Scientific World Journal

Research Article

Effectiveness of Nanohydroxyapatite on Demineralization of Enamel and Cementum Surrounding Margin of Yttria-Stabilized Zirconia Polycrystalline Ceramic Restoration

Table 1

Mean, standard deviation (SD), and 95% confidence interval of Vickers microhardness (VHN) of enamel (E) and cementum (C) before material application (BM), after material application (AM), and after inducing demineralization (AD) with nanohydroxyapatite (NHA), Clinpro (CP), and no treatment (NT).
1.1 Vickers microhardness of enamel
GroupnMeanSD95% confidence interval
Lower limitUpper limit
E-NT-BM10393.2426.27374.44412.04
E-NT-AM10392.8917.22380.58405.21
E-NT-AD10155.005.68150.94159.06
E-NHA-BM10390.1017.69377.44402.76
E-NHA-AM10406.7712.86397.57415.98
E-NHA-AD10181.557.99175.83187.27
E-CP-BM10387.9018.07374.97400.83
E-CP-AM10405.919.83398.88412.94
E-CP-AD10188.957.43183.63194.26
1.2 Vickers microhardness of cementum
GroupnMeanSD95% confidence interval
Lower limitUpper limit
C-NT-BM1069.894.5966.6173.18
C-NT-AM1066.283.6163.7068.87
C-NT-AD1018.130.5517.7418.52
C-NHA-BM1056.019.2649.3962.63
C-NHA-AM1062.716.1558.3267.11
C-NHA-AD1019.091.1618.2619.93
C-CP-BM1054.687.3049.4659.91
C-CP-AM1061.814.3058.7464.89
C-CP-AD1019.221.2518.3320.11