Analysis of the Morphological Characteristics of the Palatal Rugae for Three-Dimensional Superimposition of Digital Models in Korean Subjects

Table 1

Mean number of the primary, secondary, and fragmentary rugae between right and left sides.

Type of ruga	Right (N = 343)		Left (N = 343)		P value
	Mean	SD	Mean	SD
Primary ruga	3.5	0.8	3.4	0.6	0.064
Secondary ruga	1.3	0.8	1.2	0.8	0.103
Fragmentary ruga	1.0	0.9	1.3	1.2	< 0.001

SD: standard deviation.