## Materials and Methods
### The Oas' Release from the BC Dressings  
To assess the release of the antimicrobials tested using BC disks, a spectrometric method using the MultiScan Go (Thermo Fisher, Warsaw, Poland) spectrometer was used. BC discs were incubated for 300 min at 37 \({}^{\circ}\)C in closed beakers containing 5 mL of clean, sterile water. At times of 5, 15, 30, 45, 60, 90, 120, 180, and 300 min, 200 \(\mu\)L of the resulting solution was transferred to wells on a transparent UV microplate (Becton Dickinson and Company, Franklin Lakes, NY, USA). Absorbance was determined spectroscopically at a 230 nm wavelength for each of the tested OA. Antiseptic working concentrations were used, with the exception of PVP-I, whose intense brown color forced dilution of the antiseptic 10\(\times\) for measurement. After analysis, 200 \(\mu\)L of the test solutions were returned to beakers containing antiseptic. The experiments were performed in triplicates. Estimation of the Antimicrobial Activity of BC Dressings Saturated with Oral Antiseptic Using a Modified Disc Diffusion Method  
The BC dressings impregnated with oral antiseptic were placed onto the surface of the M-H agar medium (BioMaxima, Poland) seeded with the suspension of _S. aureus_, _P. aeruginosa_, _E. faecalis_, and _C. albicans_ at a density of 0.5 McFarland. For _Str. Mutans_ and _A. actinomycetemcomitans_, M-H agar medium supplemented with 3% sucrose was applied. Next, the cultures were carried out at 37 \({}^{\circ}\)C in 5% CO\({}_{2}\) for 24 h. The average diameters of the inhibition zone (in mm) were calculated for each tested sample. The tests were performed in triplicates. The results were presented as growth inhibition zone (inhibition zone (mm) minus BC diameter (mm)). These experiments were performed using six repeats. Confirmation of Ability of Tested Strains to Form Biofilm on Hydroxapatite (HA) Disc Surface by Means of Scanning Electron Microscopy  
A total of 2 mL of TSB suspension containing 1.5 \(\times\) 10\({}^{8}\) CFU/mL of tested strains was introduced to wells of 24-well plates containing HA discs and incubated for 24 h at 37 \({}^{\circ}\)C in 5% CO\({}_{2}\). For _Str. mutans_ and _A. actinomycetemcomitans_, TSB suspension was enriched with 3% sucrose. Subsequently, biofilm-containing HA discs were gently rinsed with 0.9% NaCl to remove non-adherent cells. Next, the biofilm-containing HA discs were fixed via immersion in 2% glutarate for 4 h at 4 \({}^{\circ}\)C. After incubation, the samples were rinsed three times (for 2 min) with water to remove the fixative. Dehydration in increasing concentrations of ethanol (1x 25%, 50%, 70%, 80%, and 90%, and 2x 10% and 100%) was performed for 10 min (for 10-90% concentrations of ethanol) and for 15 min for the 100% ethanol concentration. The ethanol was then rinsed off and the samples were dried at 37 \({}^{\circ}\)C. Then the biofilm-containing agar plugs were sputtered using a Au:Pd mixture and examined using a scanning electron microscope (ZEISS EVO MA, Oberkochen, Germany). Evaluation of the Activity of Antiseptic-Saturated BC Dressings in Conditions Imitating an Oral Cavity Environment  
The HA discs were soaked with 2 mL of AS for 1 h. Subsequently, the abundance of AS was removed and 2 mL of TSB suspension containing 1.5 \(\times\) 10\({}^{8}\) CFU/mL of tested strains was introduced to wells of 24-well plates containing HA discs and incubated for 24 h at 37 \({}^{\circ}\)C in 5% CO\({}_{2}\). For _Str. mutans_ and _A. actinomycetemcomitans_, a TSB suspension enriched with 3% sucrose was applied. Subsequently, the biofilm-containing HA discs were gently rinsed with saline to remove non-adherent cells. At the same time, 1 mL of 2% tryptic soy agar (TSA) was poured into wells of a 24-well plate. The plate was left in a sterile chamber until the agar consolidated. Next, the agar plugs were cut out using a customized cork-borer with a 1.8 mm diameter. Afterwards, biofilm-containing HA discs were introduced to the bottom of wells and immersed in 400 \(\upmu\)L of AS containing 3% sucrose.