Reduction of Dental Plaque Deposition in Humans by Oolong Tea ExtractOoshima T. · Minami T. · Aono W. · Tamura Y. · Hamada S.
Departments of aPedodontics and bOral Microbiology, Osaka University Faculty of Dentistry, Suita-Osaka, Japan
The inhibitory effect of oolong tea extract (OTE) containing polymerized polyphenols on plaque deposition was examined in 35 human volunteers. Thirty-five human volunteers, aged 18-29 years, who received extensive oral prophylactic procedures were requested to refrain from all oral hygiene procedures for 4 days, and to rinse their mouth with 0.5 mg/ml OTE solution in 0.2% ethanol before and after every intake of food and before sleeping at night. No restriction regarding meals was given during the test period, except to refrain from teas or coffee. Plaque deposition was evaluated after disclosing the teeth with Erythrocin at the termination of this experiment. The study was repeated 1 week after the first trial, but only 0.2% ethanol without OTE was used for mouthrinsing in the second trial. OTE was found to significantly inhibit plaque deposition in volunteers, although mouthrinsing with OTE solution had no significant effect on the number of mutans streptococci in unstimulated whole saliva.
Dr. Takashi Ooshima, Department of Pedodontics, Osaka University Faculty of Dentistry, 1-8 Yamadaoka, Suita-Osaka, 565 (Japan)
Received: July 22, 1993
Accepted after revision: November 11, 1993
Published online: November 24, 2009
Number of Print Pages : 4
Vol. 28, No. 3, Year 1994 (Cover Date: 1994)
Journal Editor: Shellis R.P. (Bristol)
ISSN: 0008-6568 (Print), eISSN: 1421-976X (Online)
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