Study on quantitative evaluation of the influence of a dental water jet on the oral biofilmstructure and the oral micro flora

2014 Fiscal Year Final Research Report

• Project/Area Number: 24593178
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Social dentistry
• Research Institution: Aichi Gakuin University
• Principal Investigator: KATO Kazuo 愛知学院大学, 歯学部, 准教授 (60183266)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 口腔バイオフィルム / ジェット水流 / 定量的評価 / 電子線マイクロアナライザ / S-PRGフィラー配合歯磨剤 / 酸蝕象牙質の磨耗 / depth-specific analysis

Outline of Final Research Achievements

An inhibitory effect of 0.2% chlorhexidine treatment against the oral biofilm which was irrigated with a pulsating jet stream of water (350 kPa) was evaluated by measuring thickness of biofilm using an Electron Probe Micro-Analyzer (EPMA). However, the combined effect of the chlorhexidine treatment and the water irrigation could not be detected.
The influence of factors (such as tip form, brush tension and slurry viscosity) transmitting brushing force onto eroded dentine surface was evaluated by measuring thickness of substance loss using an EPMA. Eroded dentine wear by a sonic toothbrush was deeper with tapered tip than with flat trim.
Oral biofilm uptake of mineral ions (Al, B, F, Sr) released from experimental toothpaste containing surface pre-reacted glass-ionomer (S-PRG) filler was estimated by depth-specific analysis. The biofilm showed significant uptake of only F and Sr.

Free Research Field

口腔衛生学