What is NOT a potential cause of angular cheilitis?

Angular cheilitis is a condition characterized by inflammation and cracking at the corners of the mouth, and understanding its potential causes is essential for proper diagnosis and treatment. Among the options provided, allergic reactions, such as those to dental materials, are less commonly associated with angular cheilitis compared to the other factors listed.

Vitamin B2 deficiency can lead to angular cheilitis, as riboflavin plays a crucial role in maintaining healthy skin and mucous membranes. A deficiency in this vitamin can result in lesions and inflammation at the mouth's corners. Similarly, a Candida infection is another well-recognized cause, as this fungal infection can thrive in warm, moist environments, particularly in areas such as the corners of the mouth where skin folds exist. Iron deficiency is also linked to angular cheilitis, as it can contribute to various mucosal changes, leading to irritation and cracking.

In contrast, while allergies to dental materials can lead to localized reactions, they are not a prevalent cause of angular cheilitis, making this option the one that does not fit within the typical range of causes for the condition. Understanding these distinctions is important in both diagnosis and treatment strategies for individuals experiencing symptoms of angular cheilitis.