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Objective <p>This study investigated the antimicrobial efficacy of biosurfactant alone and in combination with Er: YAG laser radiation against Enterococcus faecalis and compared it to that of conventional irrigation sodium hypochlorite.</p> Materials &amp; methods <p>Sixty-five extracted maxillary central incisors were collected and decoronated. Root canals were then instrumented mechanically using rotary files and inoculated with E. faecalis, then divided into 5 groups (#13 each group) according to irrigation protocol: Group 1: irrigated by distilled water, Group 2: irrigated with 2.5% NaOCl, Group 3: irradiated with Er: YAG laser, Group 4: irrigated with biosurfactant, Group 5: irrigated with biosurfactant, then irradiated with an Er: YAG laser. Assessment of antibacterial effect and inhibition zone and biofilm inhibition were performed.</p> Results <p>The results showed that the biosurfactant group demonstrated the highest mean inhibition zone, followed closely by the combination of Er: YAG laser with biosurfactant and Er: YAG laser alone. The highest mean biofilm inhibition was recorded in the group treated with Er: YAG laser combined with the biosurfactant, followed closely by the biosurfactant group alone and NaOCl.</p> Conclusion <p>It was concluded that the use of biosurfactant in combination with Er: YAG laser activation has a superior biofilm inhibition effect. The Er: YAG laser could be used as a supplement for root canal disinfection.</p>

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Antimicrobial effect and biofilm inhibition of biosurfactant as an irrigante against root canal bacteria with and without laser irradiation

  • 期刊论文

  • 发表日期：

    2026年7月4日

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  • Doaa Mohamed Sadony,
  • Amira Ibrahim Mohamed,
  • Ahmed A. Hamed,
  • Seham F. Hasan,
  • Heba I. Elkhouly

摘要

Objective

This study investigated the antimicrobial efficacy of biosurfactant alone and in combination with Er: YAG laser radiation against Enterococcus faecalis and compared it to that of conventional irrigation sodium hypochlorite.

Materials & methods

Sixty-five extracted maxillary central incisors were collected and decoronated. Root canals were then instrumented mechanically using rotary files and inoculated with E. faecalis, then divided into 5 groups (#13 each group) according to irrigation protocol: Group 1: irrigated by distilled water, Group 2: irrigated with 2.5% NaOCl, Group 3: irradiated with Er: YAG laser, Group 4: irrigated with biosurfactant, Group 5: irrigated with biosurfactant, then irradiated with an Er: YAG laser. Assessment of antibacterial effect and inhibition zone and biofilm inhibition were performed.

Results

The results showed that the biosurfactant group demonstrated the highest mean inhibition zone, followed closely by the combination of Er: YAG laser with biosurfactant and Er: YAG laser alone. The highest mean biofilm inhibition was recorded in the group treated with Er: YAG laser combined with the biosurfactant, followed closely by the biosurfactant group alone and NaOCl.

Conclusion

It was concluded that the use of biosurfactant in combination with Er: YAG laser activation has a superior biofilm inhibition effect. The Er: YAG laser could be used as a supplement for root canal disinfection.