The gingival black triangle, or open gingival embrasures, a condition caused by the disappearance of interdental papillae, is a crucial aspect of restorative dental care. It affects the gingival's aesthetics and can cause concerns for patients, including appearance, phonetics, food impaction, and oral hygiene maintenance. Current research and data provide very limited answers to the question of the association between orthodontic treatment and gingival black triangles. This sectional study aim to determine the prevalence of gingival black triangles among Saudi Arabian patients who had received fixed orthodontic treatment. The study included 538 participants, 71.9% of whom were females. A significant majority (83.0%) indicated that they had finished their orthodontic treatment. Additionally, 14.1% and 2.2% of individuals reported undergoing treatment for four to six years and more than six years, respectively. The reasons for initiating orthodontic treatment were diverse. The most common reason, cited by 32.5% of respondents, was the presence of gaps between their teeth. The data touched upon the presence of black triangles after orthodontic treatment, with 29.7% of respondents acknowledging their existence, while 70.3% reported not noticing such gaps. A significant portion of respondents (69.4%) discovered the existence of black triangles by themselves, often after brushing or flossing, or by noticing them in the mirror. The prevalence assessment of gingival black triangles following fixed orthodontic appliance treatment among patients in Saudi Arabia revealed that almost one-third of the participants experienced this issue. This indicates a significant occurrence of gingival black triangles in this population.
