[The inhibitory effect of glass ionomer cement for orthodontic bonding on bacteria].
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.
Wang
Shi-min
SM
Department of PDI, Peking University School of Stomatology, Beijing 100081, China.
Hu
Wei
W
Fu
Min-kui
MK
D000293:Adolescent; D002648:Child; D003188:Composite Resins / Q000494:pharmacology; D003773:Dental Plaque / Q000382:microbiology*; D005260:Female; D005899:Glass Ionomer Cements / Q000494:pharmacology*; D006801:Humans; D007778:Lactobacillus / Q000187:drug effects*; D008297:Male; D016910:Orthodontic Brackets / Q000009:adverse effects; D013295:Streptococcus mutans / Q000187:drug effects*
D003188:Composite Resins; D005899:Glass Ionomer Cements