Antibacterial and bioactive coatings on titanium implant surfaces

Anupama Kulkarni Aranya, Smruti Pushalkar, Minglei Zhao, Racquel Z. LeGeros, Yu Zhang, Deepak Saxena

Research output: Contribution to journalArticle

Abstract

Various surface modifications have been tried for enhancing osseointegration of the dental implants like mechanical and/or chemical treatments and deposition of calcium phosphate coatings. The objective of this research was to develop calcium-phosphate based thin coatings with antibacterial and bioactive properties for potential application in dental implants. Titanium (Ti) discs were immersed in different calcifying solutions: CaP (positive control), F-CaP, Zn-CaP, and FZn-CaP and incubated for 24 h. Negative control was uncoated Ti discs. Coated surfaces were characterized using X-ray diffraction, scanning electron microscopy and energy dispersive spectroscopy. Antibacterial properties were tested using Porphyromonas gingivalis because of its strong association with periodontal and peri-implant infections. Bacterial adhesion and colonization were studied at different timepoints. The coated surfaces had compositional characteristics similar to that of bone mineral and they inhibited the growth, colonization and adherence of P. gingivalis, resulted in reduced thickness of biofilms and bacterial inhibition in the culture medium as compared to the positive and negative controls (p < 0.05). There was no significant difference between the experimental groups (p > 0.05). It has been previously demonstrated that these coatings have excellent in vitro bioactivity (formed carbonate hydroxyapatite when immersed in a simulated body fluid). Such coatings can enhance osseointegration and prevent infection in implants, thereby improving the success rates of implants.

Original languageEnglish (US)
Pages (from-to)2218-2227
Number of pages10
JournalJournal of Biomedical Materials Research - Part A
Volume105
Issue number8
DOIs
StatePublished - Aug 2017

Keywords

  • Porphyromonas gingivalis
  • antibacterial
  • bioactivity
  • dental implant
  • implant coatings

ASJC Scopus subject areas

  • Ceramics and Composites
  • Biomaterials
  • Biomedical Engineering
  • Metals and Alloys

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