LaQuia A Vinson1, Patrick R Gilbert2, Brian J Sanders3, Elizabeth Moser4, Richard L Gregory5. 1. Assistant professor and an assistant program director, in the School of Dentistry, at Indiana University, Indianapolis, Ind., USA;, Email: laqawalk@iu.edu. 2. Resident, in the School of Dentistry, at Indiana University, Indianapolis, Ind., USA. 3. Chair and a professor, Department of Pediatric Dentistry, in the School of Dentistry, at Indiana University, Indianapolis, Ind., USA. 4. Biostatistician, Department of Biostatistics, School of Medicine, all at Indiana University, Indianapolis, Ind., USA. 5. Associate Dean for Graduate Education and Professor, Department of Biomedical and Applied Sciences, in the School of Dentistry, at Indiana University, Indianapolis, Ind., USA.
Abstract
Purpose: The purpose of this study was to investigate the inhibitory in vitro effects of silver diamine fluoride (SDF) with and without a saturated solution of potassium iodide (SSKI) on established Streptococcus mutans biofilm. Methods: Fifty μl of an overnight S. mutans culture (106 CFU per mL) in Tryptic Soy Broth (TSB) and three ml of fresh TSB supplemented with one percent sucrose (TSBS) were incubated for 24 hours to establish an S. mutans biofilm in six-well tissue culture plates. Four treatments (SDF, SSKI, SDF plus SSKI, and untreated control) were used to disrupt the biofilm. The biofilm groups were each treated with reagent and washed; the biofilm was collected, diluted, and spiral-plated onto blood agar plates; and an automated counting machine was used to determine the bacterial colony forming units (CFU). Results: The control had significantly more CFU than the SSKI, SDF, and SDF plus SSKI groups (P<.0001). The SSKI group had significantly more CFU than the SDF and SDF plus SSKI groups (P<.0001). The SDF group had significantly fewer CFU than the SDF plus SSKI group (P=.02). The reduction from the control was more than seven-fold for SDF, four-fold for SDF plus SSKI, and two-fold for SSKI.Conclusions: SDF alone, SDF plus SSKI, and SSKI disrupted an established S. mutans biofilm. SDF alone had the greatest overall disruption.
Purpose: The purpose of this study was to investigate the inhibitory in vitro effects of silver diamine fluoride (SDF) with and without a saturated solution of potassium iodide (SSKI) on established Streptococcus mutans biofilm. Methods: Fifty μl of an overnight S. mutans culture (106 CFU per mL) in Tryptic Soy Broth (TSB) and three ml of fresh TSB supplemented with one percent sucrose (TSBS) were incubated for 24 hours to establish an S. mutans biofilm in six-well tissue culture plates. Four treatments (SDF, SSKI, SDF plus SSKI, and untreated control) were used to disrupt the biofilm. The biofilm groups were each treated with reagent and washed; the biofilm was collected, diluted, and spiral-plated onto blood agar plates; and an automated counting machine was used to determine the bacterial colony forming units (CFU). Results: The control had significantly more CFU than the SSKI, SDF, and SDF plus SSKI groups (P<.0001). The SSKI group had significantly more CFU than the SDF and SDF plus SSKI groups (P<.0001). The SDF group had significantly fewer CFU than the SDF plus SSKI group (P=.02). The reduction from the control was more than seven-fold for SDF, four-fold for SDF plus SSKI, and two-fold for SSKI.Conclusions: SDF alone, SDF plus SSKI, and SSKI disrupted an established S. mutans biofilm. SDF alone had the greatest overall disruption.
Authors: Benjamín Briseño-Marroquín; Yasmine Ismael; Angelika Callaway; Christian Tennert; Thomas Gerhard Wolf Journal: BMC Oral Health Date: 2021-04-07 Impact factor: 2.757