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. 2019 Jul 20;14(4):383–388. doi: 10.1016/j.jds.2019.06.002

Table 2.

Mean ± standard deviation of the resonance frequency values (kHz) for mini-implants inserted with different depths in artificial bone with various trabecular bone densities.

Group n 2 mm 4 mm 6 mm
1 (40 pcf) 5 1.160 ± 0.015 4.783 ± 0.077 7.597 ± 0.070
2 (20 pcf) 5 1.190 ± 0.138 4.543 ± 0.180 7.197 ± 0.175
3 (10 pcf) 5 1.133 ± 0.012 4.377 ± 0.121 6.933 ± 0.059
P-valuea 0.1067 0.0111 0.0024
Significant differenceb Group 3 < Group 1 Group 2 < Group 1
Group 3 < Group 1
a

Kruskal-Wallis test.

b

Post hoc pairwise comparisons were conducted by Wilcoxon rank-sum test.