Abstract:
Mangosteen (Garcinia mangostana Linn.) is a popular and widely grown fruit in
Thailand. The pericarp of mangosteen consists of -mangostin that shows many biological
properties including antioxidant, anti-inflammatory, anticancer, anti-allergy, increasing of
immunity, anti-bacterial and inhibition of Streptococcus mutans (S. mutans). The objective of this
study was to develop mangosteen toothpaste preparing from pericarp ethanol extract against S.
mutans, which causes of dental caries. Six formulations of toothpaste were prepared using
different abrasiveness agents such as silica gel or calcium carbonate. The optimum toothpaste
formulation was chosen for minimal inhibition concentration (MIC) experiment based on
viscosity, pH and foaming activity. The MIC of the selected toothpaste was performed with
microorganisms, which are found in oral cavity. An agar dilution method was applied due to
limitation of turbidity of toothpaste. MIC for S. mutans and Corynebacterium diphtheria were 0.20
and 0.40 mg/mL, respectively. Comparison growth of S. mutans between toothpaste with and
without mangosteen pericarp extracts, we discovered that mangosteen pericarp extracts is
obviously the main component of inhibition of S. mutans at concentration of 0.2 mg/mL. This
concentration only inhibited S. mutans growth but did not inhibit normal flora that maintaining pH
balance and preventive pathogen microorganism. Method validation, High Performance Thinlayer
Chromatography (HPTLC) was performed to detect the α-mangostin in mangosteen
toothpaste. The developed mangosteen toothpaste can further be modified as commercial product.