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Table 2 Root resorption in millimeters and in percentage of the initial root length in the two groups

From: Root resorption after leveling with super-elastic and conventional steel arch wires: a prospective study

  Super-elastic group Stainless steel group 95% CI Pvalue
N Mean SD Range N Mean SD Range
Tooth 12 19     19      
 mm   1.07 0.91 0.00 to 2.90   0.91 1.09 −0.50 to 3.80 −0.50 to 0.82 0.62
 %   6.69 5.78 0.00 to 18.24   5.14 5.42 −3.21 to 17.27 −2.14 to 5.24 0.40
Tooth 11 24     21      
 mm   0.89 1.11 −1.20 to 3.60   0.68 0.68 −0.40 to 2.50 −0.36 to 0.77 0.46
 %   5.33 6.81 −7.89 to 3.18   3.88 3.69 −2.38 to 12.69 −1.91 to 4.82 0.39
Tooth 21 23     21      
 mm   0.53 0.92 −1.40 to 2.70   0.71 0.92 −0.90 to 2.90 −0.74 to 0.38 0.52
 %   3.22 5.73 −8.38 to 8.49   3.88 5.36 −7.03 to 17.16 −4.05 to 2.72 0.70
Tooth 22 19     21      
 mm   0.96 0.77 −0.10 to 2.50   0.65 0.52 0.00 to 1.80 −0.11 to 0.73 0.14
 %   5.94 4.90 −0.55 to 6.67   3.96 3.11 0.00 to 12.16 −0.62 to 4.58 0.13
Tooth 32 18     13      
 mm   0.94 0.77 0.00 to 2.90   1.14 0.88 0.00 to 3.40 −0.81 to 0.41 0.51
 %   5.66 4.61 0.00 to 17.47   6.56 5.04 0.00 to 19.54 −4.48 to 2.66 0.61
Tooth 31 22     22      
 mm   1.00 0.71 0.00 to 2.70   0.47 0.58 −0.30 to 1.90 0.13 to 0.92 0.01
 %   6.32 4.15 0.00 to 15.88   2.95 3.61 −2.01 to 11.38 1.00 to 5.73 0.01
Tooth 41 23     21      
 mm   0.97 1.09 0.00 to 4.00   0.61 0.46 0.00 to 1.60 −0.16 to 0.87 0.17
 %   6.03 6.63 0.00 to 25.97   3.87 2.95 0.00 to 9.94 −1.02 to 5.33 0.18
Tooth 42 18     18      
 mm   1.20 0.89 0.00 to 3.90   1.14 0.58 0.30 to 2.30 −0.46 to 0.57 0.83
 %   6.88 4.86 0.00 to 19.60   6.41 3.09 1.67 to 12.71 −2.29 to 3.23 0.73