Abstract
In the present study, we estimated the frequency of hypodontia, supernumerary teeth and fusion in the primary dentitions of patients with cheilognathopalatoschisis, and then examined them to discover whether or not the such anomalies occur in the permanent dentitions of these patients.
Eighty-five children with cheilognatopalatosisis, more than 5 years of age, were recruited from among the dental patients who visited our hospital.
Individuals with other anomalies were excluded.
Longitudinal studies on patients were done clinically and radiografically. Results:
1. Tooth anomalies were observed in 30.6% of the primary teeth, and 71.8%of the permanent teeth.
2. The ratio of tooth anomalies for the maxilla was 25.9% for the primary teeth, and 69.4% for the permanent teeth. The frequencies of these anomalies are significantly higher than for healthy children. On the other hand, tooth anomalies in the mandibula the ratio 5.9% for the primary teeth, and 12.9%for the permanent teeth, suggesting that no difference in the frequency was observed between the patients and healthy children.
3. For the maxillary primary teeth, hypodontia amounts to 14%, for the supernumerary teeth 10.6%. For the maxillary permanent teeth, hypodontia amounts to 64.7%, and for the supernumerary teeth 5.9%.
4. In the maxillary primary teeth, hypodontia was seen in the anterior region of the patients both with chilognathoshisis and with chilognatopalatoschisis, and in the posterior region of the patients with palatoschisis. In the maxillary permanent teeth, hypodontia was seen in the anterior region, in the case of chilognatoschisis, in the posterior region in the case of palatoschisis and in the anterior and posterior region in the case of chilognatopalatoschisis. These data indicate that there is a difference in the affected site between cleft types.
5. Anomalies in the number of the teeth were seen rather in either the primary teeth or in the permanent teeth. However, in the gnatoschisis with a more severe cleft, such anomalies occurred more frequently both in the primary teeth and in the permanent teeth.
6. For the relationships between the positions of the cleft and teeth anomalies, it occurs most frequently in A′BC,73.8% and A′C,11.9%, AB′B',8.3%. In AB′C, it is the least,4.8%.
