In vivo biofilm formation on stainless steel bonded retainers during different oral health-care regimens

Marije A Jongsma; Henny C van der Mei; Jelly Atema-Smit; Henk J Busscher; Yijin Ren

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In vivo biofilm formation on stainless steel bonded retainers during different oral health-care regimens

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Retention wires permanently bonded to the anterior teeth are used after orthodontic treatment to prevent the teeth from relapsing to pre-treatment positions. A disadvantage of bonded retainers is biofilm accumulation on the wires, which produces a higher incidence of gingival recession, increased pocket depth and bleeding on probing. This study compares in vivo biofilm formation on single-strand and multi-strand retention wires with different oral health-care regimens. Two-centimetre wires were placed in brackets that were bonded to the buccal side of the first molars and second premolars in the upper arches of 22 volunteers. Volunteers used a selected toothpaste with or without the additional use of a mouthrinse containing essential oils. Brushing was performed manually. Regimens were maintained for 1 week, after which the wires were removed and the oral biofilm was collected to quantify the number of organisms and their viability, determine the microbial composition and visualize the bacteria by electron microscopy. A 6-week washout period was employed between regimens. Biofilm formation was reduced on single-strand wires compared with multi-strand wires;bacteria were observed to adhere between the strands. The use of antibacterial toothpastes marginally reduced the amount of biofilm on both wire types, but significantly reduced the viability of the biofilm organisms. Additional use of the mouthrinse did not result in significant changes in biofilm amount or viability. However, major shifts in biofilm composition were induced by combining a stannous fluoride-or triclosan-containing toothpaste with the mouthrinse. These shifts can be tentatively attributed to small changes in bacterial cell surface hydrophobicity after the adsorption of the toothpaste components, which stimulate bacterial adhesion to the hydrophobic oil, as illustrated for a Streptococcus mutans strain.

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《国际口腔科学杂志（英文版）》 |2015年第1期|42-48|共7页
作者
Marije A Jongsma; Henny C van der Mei; Jelly Atema-Smit; Henk J Busscher; Yijin Ren;
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Department of 0rthodontics, University of Groningen and University Medical Centre, Groningen, The Netherlands;

Department of Biomedical Engineering, University of Groningen and University Medical Centre, Groningen, The Netherlands;

Department of Biomedical Engineering, University of Groningen and University Medical Centre, Groningen, The Netherlands;

Department of Biomedical Engineering, University of Groningen and University Medical Centre, Groningen, The Netherlands;

Department of 0rthodontics, University of Groningen and University Medical Centre, Groningen, The Netherlands;

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In vivo biofilm formation on stainless steel bonded retainers during different oral health-care regimens

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