Table 1.

Mean dentin thickness and standard deviation (SD) in mesial roots at different aspects.

Aspects	Thickness (mm)
	Maximum	Minimum	Mean	SD
Mesial	2.6	0.8	1.96	0.3
Distal	1.8	0.4	1.2	0.3
Buccal	2.7	1.6	2.17	0.2
Lingual	2.9	1.7	2.2	0.3