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. 2011 May;81(3):496-502.
doi: 10.2319/090310-518.1. Epub 2011 Feb 7.

Can we add chlorhexidine into glass ionomer cements for band cementation?

Marcel M Farret  1 , Eduardo Martinelli de Lima, Eduardo G Mota, Hugo M S Oshima, Valdir Barth, Silvia D de Oliveira
Affiliations

Can we add chlorhexidine into glass ionomer cements for band cementation?

Marcel M Farret et al. Angle Orthod. 2011 May.

Abstract

Objective: To test if the addition of chlorhexidine digluconate (CHD) might influence the mechanical properties and antibacterial properties of two different conventional glass ionomer cements (GICs) used for band cementation.

Materials and methods: Two commercial brands of conventional GICs were used: Ketac Cem Easymix (3M/ESPE, St Paul, Minn) and Meron (Voco, Cuxhaven, Germany). The cements were manipulated in their original composition and also with 10% and 18% CHD in the liquid to create a total of six groups. Diametral tensile strength, compressive strength, microhardness, shear bond strength, and antibacterial effects in 5, 45, and 65 days against Streptococcus mutans were tested in all groups, and the data were submitted to statistical analyses.

Results: There were no significant differences between the groups of the same material in diametral tensile, compressive strength, and shear bond strength (P > .05). There was significant improvement in the microhardness to the Ketac Cem Easymix (P < .001). GICs with the addition of CHD showed significant inhibition of S. mutans growth in comparison with the control groups at the three time points evaluated (P < .001). The addition of 18% CHD resulted in higher bacterial inhibition (P < .001).

Conclusions: The addition of chlorhexidine digluconate to conventional GICs does not negatively modify the mechanical properties and may increase the antibacterial effects around the GICs even for relatively long periods of time.

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Figures

Figure 1
Figure 1
Shear bond strength test. Specimen prepared for the test (a), and specimen positioned into the matrix with a loading chisel in the universal testing machine (b).
Figure 2
Figure 2
Agar plates with specimens positioned before incubation (a) and after incubation period (b) and the two lines of measure used in each inhibition zone (c).
See this image and copyright information in PMC

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