The World Health Organization, in recent studies, indicates that four in ten Portuguese people suffer from hypertension. Of these, half do not have effective control and monitoring. These figures place Portugal above the global average for the prevalence of hypertension.
Oral health has increasingly assumed a relevant role in understanding systemic diseases, particularly in the context of cardiovascular conditions. At the same time, a significant proportion of the population does not maintain regular dental check-ups, which may contribute to the development of periodontal diseases and, consequently, systemic complications.
Scientific evidence shows that periodontal disease (affecting the gums and supporting structures of the teeth) and hypertension are interconnected through inflammatory and vascular mechanisms. Chronic inflammation in the oral cavity may contribute to increased blood pressure, while hypertension can compromise the health of gingival tissues, creating a cycle of mutual aggravation.
Bacteria from the oral cavity may enter the bloodstream, especially in the presence of periodontal disease. This can lead to an increase in inflammatory mediators, thereby worsening hypertension and other systemic diseases through changes in the blood vessels.
Healthy gums act as a protective barrier. However, when inflamed (in conditions such as gingivitis or periodontitis), they become more permeable, facilitating the entry of bacteria into the bloodstream.
The promotion of oral health and the implementation of preventive treatments should be considered important components in the prevention and management of hypertension.
Conversely, while gum diseases may influence blood pressure and other cardiac conditions, the reverse is also true: hypertension can have a direct detrimental impact on oral health.
These effects may influence gingival health and healing, as reduced microcirculation in the gingival tissues leads to decreased oxygenation, making them more fragile and more susceptible to infection.
In practical terms, hypertension may impair the healing and regeneration of oral tissues following dental procedures.
In addition to the effects already described, several classes of medication used to treat hypertension including diuretics, beta-blockers, angiotensin-converting enzyme (ACE) inhibitors, calcium channel blockers and centrally acting agents are associated with xerostomia (dry mouth). These medications may reduce salivary flow, alter the composition of saliva and interfere with the autonomic control of the salivary glands, contributing to an oral environment more prone to the development of caries and periodontal disease due to the reduction of the mouth’s primary defence mechanisms.
In a context where hypertension remains one of the leading risk factors for cardiovascular mortality, ignoring oral health is to neglect an essential piece of the puzzle. Scientific evidence is clear: what happens in the oral cavity does not remain confined to the mouth it has repercussions throughout the body. Chronic gingival inflammation, often silent and underestimated, may contribute to worsening blood pressure and compromising vascular health.
Thus, beyond being merely an aesthetic concern, maintaining and treating oral health is an act of systemic prevention. Integrating dental medicine into the overall management of the hypertensive patient is not only desirable it is essential for truly preventive, patient-centred care.
Content developed by Dr João Barreto Santos
4, May 2026