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. 2011 Jan-Feb;19(1):57–62. doi: 10.1590/S1678-77572011000100012

Table 2.

Statistical data on friction coefficient of the systems of bracket and wire (n=15)

System 1 System 2 Significance
Abreviation Friction (N)±SD Abreviation Friction (N)±SD p-value
SSB-SS 1.37±0.26 PB-SS 1.48±0.62 0.999
SSB-SS 1.37±0.26 CB-SS 3.20±2.01 <0.001*
PB-SS 1.48±0.62 CB-SS 3.20±2.01 0.001*
SSB-TMA 3.14±1.22 PB-TMA 2.54±0.95 0.698
SSB-TMA 3.14±1.22 CB-TMA 4.16±2.40 0.34
PB-TMA 2.54±0.95 CB-TMA 4.16±2.40 0.038*
SSB-SS 1.37±0.26 SSB-TMA 3.14±1.22 0.012*
PB-SS 1.48±0.62 PB-TMA 2.54±0.95 0.396
CB-SS 3.20±2.01 CB-TMA 4.16±2.40 0.518

Significance level of 95% (*p<0.05; ANOVA and Tukey's post hoc test). SD=Standard deviation