Abstract
Periodontal disease affects the supporting tissues of the tooth. The clinical manifestation
varies from gingivitis to periodontitis. Periodontal disease is triggered by bacterial
infection that releases toxins. The imbalance between oxidants and antioxidants determines
the progression of periodontal disease. Melatonin (MEL) (N-acetyl-5-methoxytryptamine)
is a hormone in the human body. Its production takes place in various organs including
the retina, gastrointestinal tract, bone marrow, leukocytes, lymphocytes, skin, and
principally pineal gland. Its main function is the regulation of circadian and seasonal
rhythm, body weight, reproduction, bone metabolism, and tumor growth. An important
function of melatonin is the ability to reduce oxidative stress. The aim of this work
is to explain if there are differences in salivary melatonin concentration between
periodontal and healthy individuals. The study was conducted utilizing the main scientific
databases (PubMed, MEDLINE, and Web of Science). The time window considered for the
electronic search was from March 1, 2007, to March 1, 2020. The work takes into account
6 works on the disease. Other studies were excluded as they did not meet the inclusion
criteria. Studies revealed a concentration of salivary melatonin compared to patients
with periodontal disease. Studies agree that the concentration of melatonin is lower
in people with periodontal disease. Only one study showed no difference in concentration.
Melatonin, therefore, has a protective effect on the periodontium thanks to its antioxidant
properties. The salivary measurement of melatonin could be a useful tool for early
detection. It can also be used as a therapy to improve the symptoms of periodontal
disease.
Keywords
Free radical - melatonin - periodontal disease