日本金属学会誌

J. Japan Inst. Metals, Vol. 61, No. 6 (1997),
pp. 471-474

Microbial Properties of Titanium and Its Alloys for OralBacterium S. mutans

Akihisa Urayama, Takao Hanawa, Hideaki Nakae,Takashi Matsuo and Kenzo Asaoka

School of Dentistry, The University of Tokushima, Tokushima 770

Abstract:

The purpose of this study was to estimate the microbial properties of titanium and its alloys from two viewpoints: bacterial adhesion and antibacterial effect in vitro. The adhesion of oral bacterium, Streptococcus mutans (S. mutans) MT8148, on Ti, Ti-6Al-4V, and Ti-56Ni surfaces, was investigated by the scintillation counting of radioactivity of bacteria labelled with radio isotope. On the other hand, the influences of the materials on bacterial growth were determined by the optical density of bacterial suspensions. The numbers of bacteria adhered to Ti, Ti-6Al-4V, and Ti-56Ni were larger than that to glass and no differences among the materials at 7.2 ks (2 h). The number of adherent bacteria to the materials at 86.4 ks (24 h) was larger in Ti than in Ti-56Ni. No difference in relative growth of the bacteria among the materials was observed.


(Received October 30, 1996)

Keywords:

titanium, titanium alloy, oral bacteria, bacterial adhesion, antibacterial property


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