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  • Title: [Analysis of the surface roughness and bacterium adhesions on the surface of restorative materials in vitro].
    Author: Zhao J, Zhang RX, Luo YX, Zheng YL.
    Journal: Shanghai Kou Qiang Yi Xue; 2010 Dec; 19(6):616-20. PubMed ID: 21431262.
    Abstract:
    PURPOSE: To observe the common oral bacteria adhesion on the surface of prosthesis with different roughness, and to analyze the sequence of these adhesions and offer the options for better prosthesis and prevention of their occurrence. METHODS: The specimens made of Co-Cr alloy were polished step by step and divided into six groups. Then, they were put into the liquid BHI culture medium containing Ua, An and Pg. After 24h, the adhesive microbial amount and microbial amount in the culture medium were determined by counting the clonal formation unit. SPSS 6.0 software package was used to analyzed the data. RESULTS: There was significant difference among different groups of surface roughness(P<0.05). Pg was found neither on the surface of specimen , nor in the liquid BHI culture medium. After 24h, there was significant difference among six groups of Ua and An on the prosthesis surface (P<0.05). The total amount of bacterial of each group was different, too. CONCLUSIONS: Pg is inhibited when these bacteria are cultivated together. The surface roughness of the materials positively correlates with the amount of adhesive bacteria. We should choose highly polished Co-Cr alloy to lessen the bacteria adhesion. Supported by Research Fund of Science and Technology Commission of Shanghai Municipality (Grant No. 08DZ2271100) and Shanghai Leading Academic Discipline Project (Grant No.T0202).
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