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Table 3 Correlation of the root resorption of second molars according to the stage of eruption of the lower M3 positions at T1

From: Correlational study of impacted and non-functional lower third molar position with occurrence of pathologies

  Resorption—2nd molars  
Variable Present Absent Total p value
  n % n % n %  
• Stage of eruption
 Erupted 8 100.0 8 100.0 p a = 0.005*
 Partial erupted 14 100.0 14 100.0  
 Full bone impacted 10 37.0 17 63.0 27 100.0  
 Total 10 20.4 39 79.6 49 100.0  
• Pell and Gregory—T1
 IA 17 100.0 17 100.0 p a = 0.024*
 IIA 3 30.0 7 70.0 10 100.0  
 IB 3 37.5 5 62.5 8 100.0  
 IIB 1 11.1 8 88.9 9 100.0  
• Winter—T1
 Horizontal 5 55.6 4 44.4 9 100.0 p a < 0.001*
 Mesioangular 5 38.5 8 61.5 13 100.0  
 Vertical 20 100.0 20 100.0  
 Group total 10 20.4 39 79.6 49 100.0  
  1. Obs.: Relative risk was not determined due to the occurrence of zero or very low frequencies
  2. n number of teeth
  3. *Significant difference at 5 %
  4. aFisher’s exact test