Abstract
We investigated the frequency of abnormalities of the primary and permanent teeth in the maxillary anterior region for the children with cleft lip and palate.
The subjects were 116 patients (57 males and 59 females) with cleft lip, alveolus and/or palate who had visited and recieved oral management at the Pediatric Dentistry Clinic of Showa University Dental Hospital.
The results were as follows;
1. With the type of cleft, children with cleft lip, alveolus and palate were occupied a large number of the subjects, followed by cleft lip and alveolus, isolated cleft palate and cleft lip.
2. With the position of alveolar cleft, A∇BC type was found 55.4% of the subjectsw ith alveolar cleft, followed by AB∇C type 24.5% and A∇C type 19.1%.
3. Abnormalities of the teeth were more observed in the permanent teeth than in the primary teeth. With abnormality of tooth number, supernumerary teeth were observed in 20.7 % of the subjects with primary dentition and congenitally missing 57.8% with mixed dentition.
Abnormalities of tooth number and tooth position of permanent teeth were found more frequently in the children with alveolar cleft.
4. Abnormalities of the teeth were observed more frequently at the cleft side than the non-cleft side. The primary and permanent lateral incisors were affected in the highest frequency.
5. With the relation between abnormalities of primary teeth and those of permanent teeth, the cases which no abnormalities were observed in the primary dentition but abnormalities observed in the mixed dentition were seen frequently.
