Long-term Antimicrobial Activity in Vitro and Coloring Situation of Experimental Silver Carboxymethyl Chitosan—Containing Orthodontic Cements
The long-term antimicrobial activity in vitro and tooth surface coloring situation of experimental silver carboxymethyl chitosan(CMCT-Ag+)—containing orthodontic cements are observed.The streptococcus mutans is an experimental bacterium.The silver carboxymethyl chitosan at a mass ratio of 1.5％is added to 3M UV curable orthodontic adhesive to simulate the oral environment for 4 months to observe its long-term antimicrobial activity.This adhesive was used to bond brackets to detached teeth,and they were soaked in artificial saliva for four months to detect the coloring situation of the tooth surface.The containing orthodontic cements added the mass ratio of 1.5％silver carboxymethyl chitosan has good long-term antibacterial activity after four months,and there was no significant dentistry stained after six months.The CMCT-Ag+—containing orthodontic cements has a good long-term antibacterial property on Streptococcus mutans and can satisfy the clinical need of dental orthopaedics,without the tooth coloring problems.
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