Table 1.

Suzuki and Tsuchihashi classification of lip print pattern [11].

Classification	Groove
Type I	Complete straight (clear-cut vertical grooves that run across the lips)
Type I′	Partial straight (clear-cut vertical grooves that run across the lips)
Type II	Branched groove (branching Y-shaped pattern)
Type III	Intersected groove (criss-cross grooves)
Type IV	Reticular pattern (grooves that form a rectangular pattern)
Type V	Mixed groove (grooves that do not categorize in any of the above and cannot be differentiated morphologically)