Table 2

Regions	Coefficient value	Second molar - distal root	Second molar - furcation	Second molar - mesial root	First molar - distal root	First molar - furcation	First molar - mesial root	Second premolar	First premolar	Canine	Lateral incisor
Second molar - furcation	r	0.559	1	-	-	-	-	-	-	-	-
Second molar - furcation	P	0.001^b	-	-	-	-	-	-	-	-	-
Second molar - mesial root	r	0.761	0.757	1	-	-	-	-	-	-	-
Second molar - mesial root	P	0.001^b	0.001^b	-	-	-	-	-	-	-	-
First molar - distal root	r	0.646	0.42	0.688	1	-	-	-	-	-	-
First molar - distal root	P	0.001^b	0.001^b	0.001^b	-	-	-	-	-	-	-
First molar - furcation	r	0.509	0.433	0.604	0.664	1	-	-	-	-	-
First molar - furcation	P	0.001^b	0.001^b	0.001^b	0.001^b	-	-	-	-	-	-
First molar - mesial root	r	0.667	0.455	0.707	0.816	0.655	1	-	-	-	-
First molar - mesial root	P	0.001^b	0.001^b	0.001^b	0.001^b	0.001^b	-	-	-	-	-
Second premolar	r	0.586	0.462	0.593	0.682	0.578	0.667	1	-	-	-
Second premolar	P	0.001^b	0.001^b	0.001^b	0.001^b	0.001^b	0.001^b	-	-	-	-
First premolar	r	0.431	0.289	0.502	0.547	0.524	0.546	0.68	1	-	-
First premolar	P	0.001^b	0.016^a	0.001^b	0.001^b	0.001^b	0.001^b	0.001^b	-	-	-
Canine	r	0.356	0.369	0.455	0.459	0.446	0.431	0.529	0.702	1	-
Canine	P	0.001^b	0.002^a	0.001^b	0.001^b	0.001^b	0.001^b	0.001^b	0.001^b	-	-
Lateral incisor	r	0.331	0.231	0.378	0.386	0.375	0.336	0.4	0.586	0.73	1
Lateral incisor	P	0.001^b	0.058	0.001^b	0.001^b	0.001^b	0.001^b	0.001^b	0.001^b	0.001^b	-
Central incisor	r	0.32	0.291	0.333	0.404	0.367	0.309	0.398	0.54	0.676	0.838
Central incisor	P	0.001^b	0.017^a	0.001^b	0.001^b	0.001^b	0.001^b	0.001^b	0.001^b	0.001^b	0.001^b

^aStatistically significant at level P < 0.05 (Spearmen's correlation test).
^bStatistically significant at level P < 0.01 (Spearmen's correlation test).
r-value and P-value - Spearmen's rho.