Chlorhexidine-encapsulated mesoporous silica-modified dentin adhesive

Huiyi Yan, Shilei Wang, Lin Han, Wenan Peng, Luyao Yi, Rui Guo, Siying Liu, Hongye Yang, Cui Huang

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)


Objectives: This work aims to explore the feasibility of chlorhexidine-encapsulated mesoporous silica (CHX@pMSN) as a modifier of a commercial dental adhesive via the evaluation of physicochemical properties and antibacterial capabilities of adhesive–dentin interface. Methods: Therapeutic adhesives were developed in the present study by incorporating CHX@pMSN into a commercial adhesive at four mass fractions (0, 1, 5 and 10 wt.%). The antibacterial capability on Streptococcus mutans (S. mutans) biofilm, conversion degree, adhesive morphology, microtensile bond strength (MTBS) and nanoleakage expression were evaluated comprehensively. Results: MTT and CLSM evaluation showed that CHX@pMSN-doped adhesive inhibits S. mutans biofilm growth, while CHX is released from the modified adhesive continuously. The incorporation of CHX@pMSN did not affect immediate bond strength at the concentration of 1% and 5% (P > 0.05). Moreover, these bonds were mainly preserved in 5% CHX@pMSN group after one month of collagenase ageing. Meanwhile, CHX@pMSN-doped adhesive groups exhibited similar nanoleakage distribution compared with the control. Conclusion: This study showed that the 5% CHX@pMSN-modified adhesive achieved balance amongst unaffected immediate bonding strength, well-preserved bonds against collagenase ageing and effective inhibition of S. mutans biofilm growth. Clinical significance: CHX@pMSN-modified dentin adhesive can potentially extend the service life of adhesive restoration in clinic.

Original languageEnglish
Pages (from-to)83-90
Number of pages8
JournalJournal of Dentistry
Publication statusPublished - 2018 Nov
Externally publishedYes


  • Adhesive
  • Antibacterial
  • Chlorhexidine
  • Dentin
  • Mesoporous silica

ASJC Scopus subject areas

  • Dentistry(all)


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