Open Access

Effect of bisphosphonates on the mandibular bone and gingival epithelium of rats without tooth extraction

  • Authors:
    • Francesco Saverio De Ponte
    • Luciano Catalfamo
    • Gregorio Micali
    • Michele Runci
    • Giuseppina Cutroneo
    • Giovanna Vermiglio
    • Antonio Centofanti
    • Giuseppina Rizzo
  • View Affiliations

  • Published online on: March 15, 2016     https://doi.org/10.3892/etm.2016.3168
  • Pages: 1678-1684
  • Copyright: © De Ponte et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Osteonecrosis of the jaw (ONJ) is an adverse effect of bisphosphonate treatment that has become the subject of increasing investigations, in particular due to its poorly understood pathogenesis. Several experimental studies on animal models have been conducted; however, the majority of these replicate human ONJ following tooth extraction, and describe alterations in the bone and gingival epithelium when necrosis is manifested. The aim of the present study was to analyze the rat mandibular bone and gingival epithelium during 45 days of zoledronate treatment (which is a bisphosphonate agent), without tooth extraction. Intraperitoneal injections of zoledronate acid (0.1 mg/kg) were performed three times a week in normal male Wistar rats (n=20), while a control group of rats (n=20) was treated with saline solution for 45 days. After 7, 15, 30 and 45 days of drug treatment, all rats were sacrificed and hematoxilin and eosin staining, immunofluorescence and scanning electron microscopy analyses were performed. The results of the analyses after 7 and 15 days of treatment were similar in the treatment and control group. After 30 and 45 days of treatment, structural alterations were observed in the bone. No structural alterations to the gingival epithelium were observed. Based on these results, it was hypothesized that low doses of zoledronate act directly on the bone tissues to induce morphological alterations from bone to necrotic tissue following surgical procedures, although no cytotoxic effects were detected in the gingival epithelium.
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May-2016
Volume 11 Issue 5

Print ISSN: 1792-0981
Online ISSN:1792-1015

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Spandidos Publications style
De Ponte FS, Catalfamo L, Micali G, Runci M, Cutroneo G, Vermiglio G, Centofanti A and Rizzo G: Effect of bisphosphonates on the mandibular bone and gingival epithelium of rats without tooth extraction. Exp Ther Med 11: 1678-1684, 2016.
APA
De Ponte, F.S., Catalfamo, L., Micali, G., Runci, M., Cutroneo, G., Vermiglio, G. ... Rizzo, G. (2016). Effect of bisphosphonates on the mandibular bone and gingival epithelium of rats without tooth extraction. Experimental and Therapeutic Medicine, 11, 1678-1684. https://doi.org/10.3892/etm.2016.3168
MLA
De Ponte, F. S., Catalfamo, L., Micali, G., Runci, M., Cutroneo, G., Vermiglio, G., Centofanti, A., Rizzo, G."Effect of bisphosphonates on the mandibular bone and gingival epithelium of rats without tooth extraction". Experimental and Therapeutic Medicine 11.5 (2016): 1678-1684.
Chicago
De Ponte, F. S., Catalfamo, L., Micali, G., Runci, M., Cutroneo, G., Vermiglio, G., Centofanti, A., Rizzo, G."Effect of bisphosphonates on the mandibular bone and gingival epithelium of rats without tooth extraction". Experimental and Therapeutic Medicine 11, no. 5 (2016): 1678-1684. https://doi.org/10.3892/etm.2016.3168