Hormones and Oral Health: Understanding the Connection

Hormones play a vital role in regulating many body systems, including the immune response, bone metabolism, and tissue health — all of which influence oral health. At key stages in life, fluctuations in hormone levels can have a significant impact on the gums, teeth, and supporting structures. For women in particular, changes during puberty, menstruation, pregnancy, menopause, and with the use of hormone replacement therapy (HRT) or contraceptives can lead to increased vulnerability to oral health problems.

Hormonal Influences on the Mouth

Sex hormones, particularly oestrogen and progesterone, have a direct effect on the oral mucosa and periodontium (the structures that support the teeth, including the gums and bone). These hormones influence blood flow, inflammatory response, and the composition of connective tissue, which can alter how the mouth responds to plaque and bacteria.

Oral Health and Hormones

Oral Health Conditions Affected by Hormonal Changes

1. Puberty Gingivitis

Increased levels of oestrogen and progesterone during puberty can exaggerate the gum's response to even small amounts of plaque. This may cause:

• Swollen, red, or bleeding gums

• Increased sensitivity

• Halitosis (bad breath)

Good oral hygiene and routine dental care are key during this time to prevent progression to periodontal disease.

2. Menstrual Cycle-Related Gingival Changes

Some women experience gingival discomfort or swelling around ovulation or during menstruation. This is known as menstruation gingivitis and typically resolves as hormone levels stabilise.

3. Pregnancy Gingivitis and Periodontitis

Around 60–75% of pregnant women experience gingivitis, especially during the second trimester. Elevated progesterone increases vascular permeability and inflammatory response, leading to:

• Bleeding gums

• Swollen, tender tissues

• Potential development of “pregnancy tumours” (pyogenic granulomas)

Untreated periodontal disease during pregnancy has been associated with adverse pregnancy outcomes, including preterm birth and low birth weight. Regular dental reviews are recommended.

4. Menopause and Oral Health

Declining oestrogen levels during menopause can lead to several oral changes:

• Dry mouth (xerostomia): Reduced salivary flow increases the risk of tooth decay, gum disease, and oral infections.

• Burning mouth syndrome: A chronic burning or tingling sensation, often linked to hormonal fluctuations.

• Osteoporosis-related tooth loss: Decreased bone density can affect the jawbone, potentially leading to loosening or loss of teeth.

Oestrogen replacement therapy has shown benefits in improving salivary function and reducing periodontal risk in postmenopausal women.

5. Oral Contraceptives and Hormone Replacement Therapy

Both oral contraceptives and HRT can cause similar gingival changes due to their hormonal content. While modern formulations have lower doses and reduced side effects compared to earlier versions, users may still experience:

• Increased gum sensitivity

• Exaggerated response to plaque

• Temporarily increased risk of gum disease

Regular dental check-ups and optimal hygiene are important for anyone taking hormonal medication.

The Role of Inflammation and the Immune System

Hormones can influence the immune system’s response to bacteria in the mouth. Elevated progesterone may suppress the body’s natural immune defences, making it harder to control plaque-related inflammation. Oestrogen affects the production and activity of cytokines — proteins that mediate inflammation — which can contribute to gum disease progression when unbalanced.

Clinical Implications

Understanding the link between hormones and oral health is essential in delivering integrated care, particularly in:

• Menopause and midlife health clinics

• Pregnancy care

• Adolescent health services

How to improve oral health:

• Twice-daily brushing and daily flossing

• Regular hygienist appointments

• Regular dental check-ups, especially during hormonal transitions

• Healthy lifestyle habits such as stopping smoking, reducing sugar intake, and managing stress

Hormonal changes are a natural part of life, but their impact on oral health shouldn’t be overlooked. A collaborative approach between dental and medical professionals helps ensure optimal outcomes for patients, especially those experiencing life-stage-related hormonal shifts.

References:

1. Mariotti A. Sex steroid hormones and cell dynamics in the periodontium. Crit Rev Oral Biol Med. 1994.

2. American Academy of Periodontology. Women and periodontal health.

3. Suresh L, Radfar L. Oral lichen planus, a review for dental practitioners. J Calif Dent Assoc. 2005.

4. Rahman SA, et al. Effects of menopause on oral health: A literature review. J Midlife Health. 2019.