Table 2 Canine root resorption scores (chi-squared test)
Canine root resorption score | Pre-retraction canine root resorption | Post- retraction canine root resorption | Chi-squared | P value | |||
Frequency | Percent | Frequency | Percent | ||||
Root resorption scores within the control side | Zero | 28 | 82.4% | 25 | 73.5% | 1.17 | 0.76025 P > 0.05 NS |
One | 2 | 5.9% | 2 | 5.9% | |||
Two | 3 | 8.8% | 6 | 17.6% | |||
Three | 1 | 2.9% | 1 | 2.9% | |||
Root resorption scores within the MOP side | Zero | 30 | 88.2% | 23 | 67.6% | 5.12 | 0.16290 P > 0.05 NS |
One | 2 | 5.9% | 3 | 8.8% | |||
Two | 2 | 5.9% | 6 | 17.6% | |||
Three | 0 | 0.0% | 2 | 5.9% | |||
Root resorption score difference between the MOP and control groups | Canine root resorption score difference (post-pre) | MOP group | Control group | Chi-squared | P value | ||
Zero | 24 | 70.6% | 30 | 88.2% | 3.24 | 0.198 P > 0.05 NS | |
One | 5 | 14.7% | 2 | 5.9% | |||
Two | 5 | 14.7% | 2 | 5.9% | |||