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Table 3 Root resorption craters area and volume in the two study groups

From: The effect of two different types of forces on possible root resorption in relation to dentin phosphoprotein levels: a single-blind, split-mouth, randomized controlled trial

  Continuous force Intermittent force Mean difference (SD) 95% CI WSR
P value
Mean ± SD
Crater area 1.92 ± 0.82 1.48 ± 0.34 0.43 (1.01) 0.06, 0.08 0.03*
Total crater volume 0.13 ± 0.06 0.05 ± 0.03 0.08 (0.06) 0.06, 0.10 < 0.001*
Total buccal volume 0.14 ± 0.07 0.04 ± 0.03 0.10 (0.07) 0.05, 0.14 0.003*
Total lingual volume 0.14 ± 0.02 0.07 ± 0.04 0.07 (0.06) − 0.02, 0.16 0.07
Total mesial volume 0.15 ± 0.05 0.05 ± 0.04 0.11 (0.06) 0.05, 0.18 0.03*
Total distal volume 0.06 ± 0.001 0.07 ± 0.02 − 0.02 (0.03) − 0.26, 0.22 0.18
Total cervical volume 0.16 ± 0.06 0.05 ± 0.04 0.11 (0.07) 0.06, 0.15 0.002*
Total middle volume 0.08 ± 0.02 0.04 ± 0.02 0.04 (0.03) − 0.03, 0.10 0.11
Total apical volume 0.14 ± 0.02 0.05 ± 0.02 0.09 (0.03) 0.06, 0.12 0.03*
Friedman test    
Buccal–lingual–mesial–distal 0.31 0.20  
Cervical–middle–apical 0.10 0.69  
  1. WSR Wilcoxon signed rank test, SD standard deviation, CI confidence interval
  2. *Statistically significant at P value < 0.05