Table I.

Measurements of central tendency of the maximum and minimum diameters of the physiological foramen of each root (all dimensions in millimeters).

Root	Mesiobuccal		Distobuccal		Palatal		Mesial		Distal
	n= 35		n= 30		n= 32		n= 39		n= 38
Diameter	Major	Minor	Major	Minor	Major	Minor	Major	Minor	Major	Minor
Minimum	0.134	0.079	0.127	0.104	0.152	0.107	0.136	0.109	0.095	0.09
Maximum	0.709	0.531	0.909	0.830	0.720	0.485	0.795	0.436	0.854	0.527
Mean	0.307	0.230	0.320	0.248	0.400	0.272	0.311	0.227	0.360	0.266
SD	0.124	0.087	0.177	0.169	0.153	0.097	0.136	0.085	0.154	0.112