What branch of dentistry deals with irregularities of the teeth?

The branch of dentistry that specifically addresses irregularities of the teeth is orthodontics. This specialty focuses on the diagnosis, prevention, and correction of misaligned teeth and jaws. Orthodontists use various means such as braces, retainers, and aligners to realign teeth and improve bite functioning, as well as to enhance the aesthetic appearance of patients' smiles.

In contrast, periodontics is centered around the supporting structures of the teeth and diseases that affect them, endodontics deals primarily with the interior of the tooth, especially root canals, and oral surgery involves surgical procedures related to the mouth, jaw, and teeth, which may not necessarily pertain to alignment issues. Therefore, orthodontics is the clear choice when discussing the treatment of irregularities in teeth.