Type of tooth CL (N = 8) BCLP (N = 39) UCLP (N = 156) CP (N = 28)
n % n % n % n %
Maxillary                
Central incisor 0 0 5 12.8 2 1.3 0 0
Lateral incisor 2 25.0 23 59.0 98 62.8 8 28.6
Canine 1 12.5 2 5.1 6 3.8 0 0
First premolar 0 0 3 7.7 4 2.6 2 7.1
Second premolar 0 0 14 35.9 19 12.2 3 10.7
First molar 0 0 0 0 0 0 0 0
Second molar 0 0 0 0 2 1.3 0 0
Mandibular                
Central incisor 0 0 2 5.1 4 2.6 2 7.1
Lateral incisor 0 0 2 5.1 9 5.8 6 21.4
Canine 0 0 0 0 1 0.6 0 0
First premolar 0 0 5 12.8 0 0 1 3.6
Second premolar 0 0 9 23.1 13 8.3 13 46.4
First molar 0 0 0 0 0 0 0 0
Second molar 0 0 0 0 1 0.6 0 0
CLP = cleft lip and palate
CL = isolated cleft lip only
BCLP = complete bilateral cleft lip, alveolus, and palate
UCLP = complete unilateral cleft lip, alveolus, and palate
CP = isolated cleft palate only.
Table 7: The frequency of hypodontia in the permanent teeth of 231 CLP southern Chinese children.