Table 1. Number and percentage of patients exhibiting post-treatment OIIEARR.

	Orthodontically induced inflammatory external apical root resorption (OIIEARR)
	None (degree 0)		Resorption (degrees 1-2-3)		P value	None to mild resorption (degree 0-1)		Severe resorption (degree 2-3)		P value
	No.	%	No.	%		No.	%	No.	%
Male	337	67.7	161	32.3	0.002*	430	86.3	68	13.7	0.2
Female	644	75	214	25		725	84.5	133	15.5
Total	981	72.3	375	27.7		1155	85.2	201	14.8

*P < 0.05, Chi-square test.