Table 4.

Unaffected Sibling of Proband: Permanent Dentition with at Least 1 Anomaly.

Anomaly	Unaffected Siblings (n = 623), n (%)	Control Siblings (n = 121), n (%)	P Value
Right maxilla
Hypoplasia	16 (3)	0	0.09
Microdontia	11 (2)	0	0.23
Impacted	7 (1)	1 (<1)	1.00
Rotated	325 (52)	66 (55)	0.69
Displaced	90 (14)	27 (22)	0.04
Agenesis	5 (<1)	0	1.00
Supernumerary	2 (<1)	0	1.00
Any anomaly	359 (58)	69 (52)	0.92
Any anomalya	39 (6)	1 (<1)	0.01
Left maxilla
Hypoplasia	16 (3)	2 (2)	0.75
Microdontia	16 (3)	0	0.09
Impacted	8 (1)	0	0.37
Rotated	338 (54)	64 (53)	0.84
Displaced	103 (17)	21 (17)	0.79
Agenesis	11 (2)	0	0.23
Supernumerary	3 (<1)	0	1.00
Any anomaly	374 (60)	69 (57)	0.55
Any anomalya	49 (8)	2 (2)	0.01
Maxilla
Hypoplasia	26 (4)	2 (2)	0.29
Microdontia	17 (3)	0	0.09
Impacted	10 (2)	1 (<1)	1.00
Rotated	391 (63)	74 (61)	0.77
Displaced	149 (24)	35 (29)	0.25
Agenesis	14 (2)	0	0.14
Supernumerary	5 (<1)	0	1.00
Any anomaly	426 (68)	77 (63)	0.34
Any anomalya	65 (10)	3 (2)	0.003
Mandible
Hypoplasia	17 (3)	1 (<1)	0.33
Microdontia	1 (<1)	0	1.00
Impacted	3 (<1)	0	1.00
Rotated	466 (75)	92 (76)	0.82
Displaced	149 (24)	21 (17)	0.13
Agenesis	7 (1)	1 (<1)	1.00
Supernumerary	3 (<1)	0	1.00
Any anomaly	488 (78)	94 (78)	0.90
Any anomalya	29 (5)	1 (2)	0.21

^aAny anomaly without malposition (displacement and rotation).