A New Approach to Enhancement of Bone Formation by Electrically Polarized Hydroxyapatite

N. C. Teng, S. Nakamura, Y. Takagi, Y. Yamashita, M. Ohgaki, K. Yamashita

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An electrical field may affect osteogenesis. Since we found that hydroxyapatite (HA) ceramics may be polarizable, we hypothesized that electrically polarized HA may foster production of new bone in vivo. Both polarized and non-polarized HA ceramics were inserted into the subperiosteum spaces at the parietal bone area of rats. After 2, 4, and 8 weeks, the implant sites were examined histologically. Morphometric analysis revealed that new bone formation was accelerated on the negatively charged surface of the polarized HA (N-surface) at 2 weeks. The newly formed bone approached maturation at 4 weeks and was thicker on the N-surface than in the controls. By 8 weeks, newly formed bone in the controls was almost the same as that on the N-surface. These findings suggest that polarized HA is biocompatible and that bone formation on the N-surface is enhanced in the early stage of bone healing.

Original languageEnglish
Pages (from-to)1925-1929
Number of pages5
JournalJournal of Dental Research
Issue number10
Publication statusPublished - 2001
Externally publishedYes



  • Bone formation
  • Electrically polarized
  • Hydroxyapatite
  • Rats

ASJC Scopus subject areas

  • Dentistry(all)

Cite this

Teng, N. C., Nakamura, S., Takagi, Y., Yamashita, Y., Ohgaki, M., & Yamashita, K. (2001). A New Approach to Enhancement of Bone Formation by Electrically Polarized Hydroxyapatite. Journal of Dental Research, 80(10), 1925-1929.