What is the primary aetiology of asymmetry?

The primary aetiology of asymmetry in orthodontics is rooted in genetic or congenital factors. These factors refer to the inherent traits passed down from parents to their offspring, which can influence the development of craniofacial structures. Genetic variations can lead to differences in growth patterns, resulting in asymmetric features. Congenital factors indicate that some asymmetries may be present at birth due to developmental anomalies that occurred in utero.

While environmental influences, dietary deficiencies, and infections during pregnancy can contribute to overall health and development, they are generally not the primary causes of asymmetry in the craniofacial region. Environmental factors can affect growth but typically play a secondary role compared to genetics. Dietary deficiencies can impact health, yet they often do not lead to significant asymmetry unless they result in severe developmental issues. Similarly, infections during pregnancy could potentially affect fetal development, but again, genetic predisposition is often a more direct cause of craniofacial asymmetries. Therefore, recognizing the role of genetic and congenital factors is key to understanding the etiological framework for asymmetry in orthodontics.