Anti-bacterial Efficacy of Probiotics used in Provisional Polymethyl Methacrylate Crowns against Porphyromonos gingivalis – an In vitro Study

Aim: To evaluate the effect of Probiotic used in PMMA Temporary restorations on gingival inflammatory response by its action on the marginal gingival epithelial cells.

Materials and Methods: This is an in vitro Interventional pilot study using discs of PMMA ( Group A ) and PMMA incorporated with Probiotics (Group B . The effect of probiotics incorporated PMMA on strains of Porphyromonos gingivalis grown on culture plates will be assessed using zone of inhibition test and minimum inhibitory concentration was assessed . Data was recorded, tabulated and statistically evaluated using SPSS software.

Results: The zone of Inhibition in the Group B was (Mean = 16.30mm) is comparatively higher than that of Group A with mean value 12.92mm. Results states that among the various concentration of Probiotic Lozenges (2.5, 5, 10, 15 and 20 µg/ml) used to determine the antibacterial activity , Highest mean zone of inhibition was observed with 20 µg/ml with 16 mm, followed by 15 µg/ml with 14mm , 10 µg/ml with 9mm, 5 µg/ml with 11 mm & with the lowest inhibition observed in 2.5 µg/ml with 8mm. There is significant correlation between concentration of probiotics and its antibacterial efficacy. The increase in concentration of probiotics in the PMMA discs is directly proportional to its antibacterial efficacy against P. gingivalis.

Conclusion: Thus the study proved a significant correlation between Probiotic used in PMMA Temporary crowns and reduction in gingival Inflammation at the margins of the restoration which will be beneficial when used in crowns used in patients undergoing Orthodontic treatment or Immediate Implant Loading with acrylic crowns.