Title:The Antibacterial Effect of Tetracycline-loaded Mesoporous Silica
Nanoparticles in the Gingival Fluid at Implant-abutment Junction:
A Randomized Clinical Trial Study
Volume: 11
Issue: 2
Author(s): Fahimeh Mirzaali, Solmaz Maleki Dizaj, Shahriar Shahi, Mohammad Yousef Memar and Feridoun Parnia*
Affiliation:
- Department of Prosthodontics,
Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
Keywords:
Antibacterial effect, tetracycline, mesoporous silica nanoparticles, gingival fluid, implant-abutment junction, pri-implantitis.
Abstract:
Introduction: Dental implant failure due to periodontal disease caused by anaerobic
pathogens occurs, especially in the first year of implant placement. The aim of this clinical trial
study was to compare the antibacterial effect of tetracycline gel and gel containing tetracyclineloaded
mesoporous silica nanoparticles (MSNs) in the gingival crevice fluid of the implantabutment
junction as a randomized clinical trial study.
Materials and Methods: Fourteen patients applying for implants in the posterior mandibular region
were included in the study. During the uncovering session, tetracycline gel and gel containing
tetracycline-loaded MSNs were placed in two implants and no substance was placed in the control
group. Then, in three sessions, including molding, prosthesis delivery, and one month after delivery,
the patient's gingival fluid was sampled and the number of bacteria in the gingival fluid was
measured by colony-forming units (CFU/mL).
Results: The results of this study showed that in all three stages of sampling, the use of tetracycline
gel and gel containing MSNs loaded with tetracycline significantly reduced the CFU/mL of
gingival crevice fluid compared to the control group. Tetracycline-loaded MSNs gel showed significantly
lower CFU/mL than tetracycline gel. The release of tetracycline from nanoparticles keep
continue for a longer time compared to tetracycline gel.
Conclusion: The use of nano-based delivery systems containing antibiotics inside the implant
fixture can reduce the bacterial count of the implant-abutment junction and then improve implant
stability.