What causes receding gums over time?

Receding gums are primarily caused by periodontal disease (gum disease), which affects approximately 47% of adults over 30 according to the Centers for Disease Control and Prevention, making it the leading cause of gum recession over time.

The main causes of receding gums include several interconnected factors that develop gradually. Periodontal disease occurs when bacteria in plaque buildup inflame and infect the gum tissue, causing it to pull away from teeth. This bacterial infection destroys the tissues and bone that support teeth, leading to progressive gum recession.

Aggressive brushing techniques represent another major cause, as using a hard-bristled toothbrush or applying excessive pressure can mechanically wear away gum tissue over months and years. The American Dental Association recommends soft-bristled brushes and gentle circular motions to prevent this damage.

Genetic predisposition plays a significant role, with some individuals inheriting thinner gum tissue or a greater susceptibility to periodontal disease. Research published in the Journal of Periodontology indicates that genetics can account for up to 30% of periodontal disease risk, regardless of oral hygiene practices.

Additional contributing factors include:

• Tobacco use: Smoking and chewing tobacco restrict blood flow to gums and impair healing
• Teeth grinding (bruxism): Excessive force from clenching damages gum attachment
• Hormonal changes: Pregnancy, menopause, and puberty can make gums more vulnerable
• Misaligned teeth: Crooked teeth create areas difficult to clean, promoting bacterial growth

Age-related changes naturally thin gum tissue over time, making older adults more susceptible to recession. However, aging alone doesn't cause significant recession without other contributing factors present.

Poor oral hygiene habits allow plaque and tartar buildup, creating an environment where harmful bacteria thrive and cause inflammation. Inadequate flossing particularly affects areas between teeth where gum recession commonly begins.

For example, a person who brushes vigorously twice daily with a hard brush while having a genetic predisposition to thin gums may experience noticeable recession by their 40s, even with otherwise good oral health habits.

Understanding these causes helps individuals take preventive measures and seek appropriate treatment when recession symptoms like tooth sensitivity or visible root exposure appear.

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