Table 2.

Distribution of third molar agenesis between twin members in the twin pair. (MZ = monozygotic twins, DZ = dizygotic twins, statistically significant results according to Fisher’s exact test: (p < 0.05)*.

Variables	Intra-pair twin members	Distribution of third molar agenesis
		DZ		MZ
		Mean frequency (%)	p	Mean frequency (%)	p
18 tooth	Twin A	2.00	0.039*	3.80	0.457
	Twin B	3.10		3.40
28 tooth	Twin A	1.50	0.039*	2.30	0.557
	Twin B	2.70		2.80
38 tooth	Twin A	1.70	0.041*	1.90	0.668
	Twin B	2.30		1.40
48 tooth	Twin A	1.40	0.048*	2.00	0.735
	Twin B	0.80		2.00