Table 5.

Frequency of oral hard and soft tissue abnormalities in DC patients and family members

Finding	Controls		DC Patients		P value*
	Yes	No	Yes	No
Leukoplakia	1	22	11	6	P < 0.001
Erythema	2	21	8	9	P < 0.01
Brown pigmentation	0	23	2	15	NS
Papillary atrophy	0	23	3	14	NS
Decreased root/crown
ratio in at least 4	0	8	6	2	P = 0.007
posterior teeth**
Taurodontism**	0	10	4	3	P = 0.015
Thin enamel**	0	16	0	16	NS
Hypodontia	1	15	2	14	NS
Aggressive periodontitis	0	23	0	16	NS

DC, dyskeratosis congenital; NS, not significant

^*The frequencies of the findings in the DC group and the family member control group were compared using Fisher’s exact test. DC family members were used as controls for all comparisons except decreased root/crown ratio. Eight age and sex matched healthy IBMFS family members were used as controls for this comparison.

^**Not all DC patients had evaluable radiographs, or were too young to determine if root formation was abnormal or taurodontism was present.