Related Experiment Video
Updated: Mar 2, 2026
07:09
Use of a High-throughput In Vitro Microfluidic System to Develop Oral Multi-species Biofilms
Published on: December 1, 2014
14.1K
Comparison of simplistic biofilm models for evaluating irrigating solutions.
Quintessence International (Berlin, Germany : 1985)
|May 18, 2017
Summary
Different biofilm models were compared for endodontic rinsing solutions. Standard irrigants effectively inhibit bacteria but their clinical reach is limited by tooth morphology, suggesting in-vitro tests may not predict real-world performance.
Area of Science:
- Endodontics
- Microbiology
- Biomaterials
Background:
- Numerous innovations in endodontics rely on in-vitro/ex-vivo testing.
- Evaluating the efficacy of endodontic irrigants requires robust biofilm models.
- Enterococcus faecalis is a common pathogen in endodontic infections.
Purpose of the Study:
- To compare different biofilm models for assessing endodontic rinsing solutions.
- To evaluate the effectiveness of common endodontic irrigants against Enterococcus faecalis biofilms.
Main Methods:
- Three biofilm models were used: petri dishes, human dentin disks, and bovine root segments.
- Susceptibility of Enterococcus faecalis biofilms to endodontic irrigants was tested.
- Inhibitory effects and penetration depth of irrigants were measured.
Main Results:
- Sodium hypochlorite (3%) showed significant inhibition, unlike citric acid (3%) on solid medium.
- Fluorescein penetration indicated dentin tubules were occluded by E. faecalis biofilms.
- A combination irrigant regimen removed biofilms only up to 0.5 mm deep, leaving deeper bacteria unaffected.
Conclusions:
- Endodontic irrigants inhibit bacterial growth but their effect is limited by tooth anatomy.
- The clinical performance of irrigating solutions may not be accurately predicted by standard diffusion tests.
