Effects of bone morphogenetic protein-6 on periodontal wound healing/regeneration in supraalveolar periodontal defects in dogs

Hsien Chung Chiu, Cheng Yang Chiang, Hsiao Pei Tu, Ulf M E Wikesjö, Cristiano Susin, Earl Fu

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14 Scopus citations

Abstract

Objective Application of a synthetic BMP-6 polypeptide in a rat periodontal fenestration defect model enhanced periodontal wound healing/regeneration including new bone and cementum formation. The purpose of this study was to translate the relevance of these initial observations into a discriminating large animal model. Methods Critical-size (4-5 mm) supraalveolar periodontal defects were created at the 2nd and 3rd mandibular premolar teeth in 11 Beagle dogs. Experimental sites received BMP-6 at 0.25, 1.0 and 2.0 mg/ml soak-loaded onto an absorbable collagen sponge (ACS) carrier or ACS alone (control) each condition repeated in four jaw quadrants. The animals were euthanized at 8 weeks when block biopsies were collected and processed for histologic/histometric analysis. Results BMP-6 at 0.25, 1.0 and 2.0 mg/ml soak-loaded onto the ACS yielded significantly enhanced new bone (0.99 ± 0.07 versus 0.23 ± 0.13 mm/BMP-6 at 0.25 mg/ml) and cementum (2.45 ± 0.54 versus 0.73 ± 0.15 mm/BMP-6 at 0.25 mg/ml) formation including a functionally oriented periodontal ligament compared with control (p < 0.05). A significant inverse linear association between BMP-6 dose and new bone (β = -0.21 ± 0.09 mm, p = 0.016) and cementum height (β = -0.34 ± 0.15 mm, p = 0.023) was observed. Minimal root resorption was observed without significant differences between groups. Ankylosis was not observed for any of the experimental groups. Conclusions Surgical application of BMP-6/ACS onto critical-size supraalveolar defects enhanced periodontal wound healing/regeneration, in particular cementogenesis including a functionally oriented periodontal ligament; the low BMP-6 0.25 mg/ml concentration apparently providing the most effective dose.

Original languageEnglish (US)
Pages (from-to)624-630
Number of pages7
JournalJournal of Clinical Periodontology
Volume40
Issue number6
DOIs
StatePublished - Jun 1 2013

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Keywords

  • BMP-6
  • animal models
  • bone morphogenetic protein-6
  • bone morphogenetic proteins
  • bone regeneration
  • dog
  • periodontal regeneration

ASJC Scopus subject areas

  • Periodontics

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