TY - JOUR ID - TI - Antibacterial activity of NBF jel against Streptococcus mutans isolated from orthodontic patients AU - Dr. Maha Jamal Abbas(Assi. Prof.) B.D.S.,M.SC.* د.مها جمال AU - Dr. Esra Hassan Abd Ali, (Assi. Prof.) M.SC, Ph. D.* د.اسراء حسن عبد علي AU - Dr. Rehab Adil Alrawi ( Assi. Lec.), B.D.S.,M.SC.** د.رحاب عادل الراوي PY - 2018 VL - 15 IS - 1 SP - 58 EP - 68 JO - MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان SN - 26188500 18138500 AB - Background: Streptococcus mutans is capable of demineralizing enamel byproducing an acidic environment. Therefore, control of the bacterial biofilm onteeth is essential for the maintenance of oral health. The NBF jel with propolisingredient that manufactured by nano-biofusion technology which has anantimicrobial activity as it is confirmed by many previous studies expected toinduce more antimicrobial effect than traditional product and lastly overcome thebacterial biofilm and prevent the carries and others oral medical problems.Aim of study : To evaluate the antibacterial action of NBF jel on Strep. mutansisolated from orthodontic appliance.Material and method: Saliva samples were collected from 36 patients wearingappliance for different duration. Strep. mutans was isolated ,purified and diagnosis, then prepared two extracts from NBF jel (aqouse and alcoholic) in differentconcentration , chlorhexidine 2%(control) were added to isolated bacteria. Afterincubation for 48 hours; the inhibition zone of antibacterial activity of NBF wasmeasured and colony count of bacteria was counted.Results: The two types of extracts have had antimicrobial activity but the alcoholicextract was induced more action than aqouse one as well as their effect was lessthan the chlorhexidine 2%(control). The inhibition zone was increased withincreasing the concentration of both extracts but the responsiveness was reducedwith increased the period of using the appliance. The reduction in colony countsof strep.Conclusion: NBF jel had antimicrobial activity against Strep. mutans isolated fromappliance and this activity indirectly correlated with duration of wearing.

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