Abstract: The purpose of this study was to assess the adherentive ability of Streptococcus mutans to the various textures of base resin surface. The adherence of Streptococcus mutans to three different roughness of denture base was examined in vitro. The results indicated that the degree of roughness of denture base could affect the adherence of the bacteria. The adherence of Streptococcus mutans to higher roughness of denture base was much stronger than that of lower roughness of denture base(P<0.05). It was important to polish the denture base surface to decrease the adherence of Streptococcus .

Key words: denture base, Streptococcus mutans, adherence