Antibacterial property expressed by a novel calcium phosphate glass

Lela Liu, Smruti Pushalkar, Deepak Saxena, Racquel Z. Legeros, Yu Zhang

Research output: Contribution to journalArticlepeer-review


We have developed a calcium phosphate glass (CPG) doped with Zn 2+ or F- or combined Zn2+ and F- ions, which are naturally found in the human body and play a dual role in bone formation and antibacterial activity. Previously, we have demonstrated that this family of CPGs has superior osteoconductive and resorbable properties in vivo. This study aimed to investigate the antibacterial property of CPGs incorporating Zn2+ and/or F-. We used Streptococcus mutans as a model organism because it is one of the major human oral pathogens and an early colonizer, and it has been associated with several oral infections, such as dental caries, periodontitis, and peri-implantitis. CPGs of 0.01 and 0.05 g were incubated with S. mutans for 0, 2, 4, and 6 h. Serial dilutions were plated in triplicate and colony forming units were determined. The antimicrobial effect of CPG incorporating Zn2+ or F- was greater than CPG incorporating both these ions. CPG without doping produced a moderate antimicrobial effect. This family of CPGs, previously shown to promote new bone formation in vivo, is demonstrated to have superior bactericidal properties.

Original languageEnglish (US)
Pages (from-to)423-429
Number of pages7
JournalJournal of Biomedical Materials Research - Part B Applied Biomaterials
Issue number3
StatePublished - Apr 2014


  • Streptococcus mutans
  • antimicrobial properties
  • calcium phosphate glass
  • fluoride
  • phosphate
  • zinc

ASJC Scopus subject areas

  • Biomaterials
  • Biomedical Engineering


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