High Altitude and Its Effects on Oral Health: A Review of Literature

Health deterioration at high altitudes is related to many pathophysiological processes. The literature contains much evidence describing the multiple factors responsible for this deterioration, including hypoxia, decreased oxygen saturation, and decreased barometric pressure. An increase in the levels of oxidative stress at high altitudes can lead to many serious health events, although the human body may be able to adapt to such changes in the case of people who are accustomed to living at a high altitude. The pathophysiological processes at high altitudes also have adverse effects on oral tissue health. The aim of this review is to summarize the major published findings about oral health deterioration of living in and travelling to high-altitude areas. Most studies have noted the adverse effects of prolonged exposure to hypoxia at high altitudes on oral tissues, including the salivary gland, periodontal tissue, gingival crevicular fluids, and jawbone. These changes include increases in the levels of inflammatory mediators and periodontal inflammation parameters. In addition, the incidence and severity of dental fluorosis is higher in residents of high-altitude areas. Abrupt changes in barometric pressure in people who travel to high altitudes may cause dental barotrauma and appear to increase sensitivity to pain (barodontalgia). In conclusion, it is important to consider that travelling to and living in high-altitude areas is a possible risk factor for multiple oral diseases.