[Influence of micro-pattern on adherence of graphite powder and three kinds of oral microbes].

Objective: Trying to find out the mechanism of microstructure influencing bacterial adhesion, we prepared different microstructures to compare the adsorptive behavior of graphite powder and adhesive behavior of oral microbe.

Methods: We used polydimethylsiloxane (PDMS) to copy 23 microstructures of hydroxyapatite (HA) chip, and cultured them with different sizes graphite powder and oral microbes respectively, to observe and compare their behavior on microstructures.

Results: The adsorption of 30-50 microm powder on different microstructures was insignificant, while 10-20 microm powder had maximum adsorption on 10 microm and 20 microm microstructures.