Abstract
Objectives: To analyse the differences between dental age and chronological age and dental anomalies in individuals with Van der Woude syndrome (VWS) and compare with non-syndromic cleft palate (NSCP) and non-cleft controls.
Materials and methods: In total, 204 oral panoramic radiographs (118 girls and 86 boys) consisting of 51 VWS patients (age (x) over bar = 8.17 +/- 1.34 years), 51 NSCP patients (age (x) over bar = 8.09 +/- 1.41 years), and 102 normative non-cleft children (age (x) over bar = 8.62 +/- 1.24 years) were collected. Dental stages were assessed by the Demirjian method, with the local dental maturity index as reference. Dental anomalies including agenesis were investigated. Statistical differences were determined by One-way ANOVA and regression. Repeatability was calculated by an intra-class correlation test and 95% confidence interval.
Results: The difference between dental age and chronological age of the VWS group (0.12 years) and the NSCP group (0.09 years) was significantly lower than the non-cleft group (0.40 years) (P= 0.002). There was no significant difference between the VWS and NSCP groups (P= 0.885). Hypodontia was more prevalent in both the VWS group (37.25%, P= 0.0001) and the NSCP group (19.60%, P = 0.035) compared with the non-cleft group (5.88%). The odds for hypodontia in the VWS group were approximately double compared with the NSCP group. In VWS patients, the most commonly missing teeth were the permanent second premolars and the maxillary permanent laterals incisors. Peg-shaped teeth had a prevalence of 13.70% in VWS patients.
Conclusions: In VWS and NSCP patients compared with non-cleft children, the difference in dental age compared with chronological age decreased. Hypodontia occurs at a high prevalence in VWS and NSCP patients compared with non-cleft children.