People often notice strange, small, dark gaps near the gumline between their teeth. Dentists refer to these spaces as “black triangles.” They occur when the gum tissue that normally fills the area between teeth (interdental papilla) no longer completely occupies the space. While often cosmetic, black triangles can also affect oral hygiene and overall gum health.
Common Reasons Black Triangles Develop
Several factors can contribute to the formation of black triangles. Gum recession due to gum disease or natural aging is one of the most common causes. As the gum tissue pulls back slightly, it exposes small gaps that were previously filled.
Tooth shape can also play a role. Teeth that are more triangular than rectangular naturally leave more space near the gumline. Orthodontic treatment sometimes reveals these gaps as teeth shift into healthier alignment. In other cases, overly aggressive brushing or long-term plaque buildup may contribute to gum tissue loss.
Because these areas can trap food particles more easily, they may also increase the risk of plaque buildup or gum irritation if not cleaned carefully. A dentist can evaluate the cause and recommend solutions that improve both the appearance of your smile and the health of your gums.
Effective Smile Solutions in West Houston, TX
If you’re in West Houston and want to learn more about what causes black triangles between teeth and how to properly address them, contact Dr. Hieu Do and the caring Total Wellness Dental team to schedule a consultation.