To investigate the incisor wingings of the Southern Chinese and compare these with studies in different populations.
Materials and Methods:
The maxillary and mandibular incisor alignment in study casts of an unselected sample from a 12 year old Hong Kong Oral Health Survey of 12 year old children (n=459; 295 boys and 164 girls) were studied.
The prevalence of bilateral winging in the maxillary arch was 9% for males and 10% for females respectively. The prevalence of bilateral winging of the mandibular incisors was higher than the maxillary central incisors, at a prevalence of 22% for both sexes. Bilateral counter-winging of the central incisors was rare.
The prevalence of bilateral winging or mesio-palatal rotation of upper central incisors was between low and intermediate in the Southern Chinese. On the contrary, the prevalence of counter-winging was low.