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[The inhibitory effect of glass ionomer cement for orthodontic bonding on bacteria]
Shi-min Wang1, Wei Hu, Min-kui Fu
1Department of PDI, Peking University School of Stomatology, Beijing 100081, China.
Objective:
To prove the inhibitory effect of glass ionomer cement for orthodontic bonding on bacteria.
Methods:
Twenty-two persons were chosen randomly. In vivo, with the split-mouth technique, brackets were bonded with glass ionomer cement or composite resin respectively. Plaque samples were taken from the area of the adhesive one month after the placement of brackets and incubated for microbiologic analysis.
Results:
There was no significant difference in the amount of total anaerobic bacteria with the two materials. There were also no obvious reduction of the numbers of S. mutans (the composite: 2.4 x 10(10) CFU/L, the glass ionomer cement: 2.8 x 10(10) CFU/L, P = 0.673) and its proportion (percentage of total CFU) with the use of glass ionomer cement compared with the composite.
Conclusions:
There was no long term inhibitory effect on bacteria adjacent to glass ionomer cement for orthodontic bonding.
