ABSTRACT
Aim: To describe the distribution and association of dental and occlusal anomalies to gender in children of mixed
and early permanent dentition. Methods: It is a cross-sectional study with stratified random sampling based on the
main ethnic composition involving 413 subjects aged between 9 and 11 years old enrolled in 7 national primary
schools in Sungai Buloh, Selangor. A calibrated operator carried out clinical examinations, and study models
were fabricated. All dental and occlusal anomalies were recorded accordingly and were analysed using SPSS
version 21.0. Pearson chi-square test was used to determine the gender-based differences for various parameters.
Results: The reported dental anomalies were supernumeraries and clinically missing teeth (impacted or
hypodontia) with a prevalence of 1.5% and 6.3%, respectively. The occlusal abnormalities were: crowding
(54.0%), sagittal discrepancies (overjet; increased, reduced, and reversed overjet: 55.5%), vertical discrepancies
(overbite; increased, reduced, and open bite: 37.5%) and transverse discrepancies (unilateral and bilateral
posterior crossbite: 5.1%). Gender-based differences were not statistically significant to all reported dental and
occlusal anomalies (p>0.05). Conclusions: Children in the mixed and early permanent dentition showed various
dental and occlusal anomalies with crowding being the highest anomaly. Gender was not associated with any
type of dental or occlusal characteristics in the studied population.