Sinus augmentation using rhBMP-2/ACS in a mini-pig model: Influence of an adjunctive ceramic bone biomaterial

Cristiano Susin, Jaebum Lee, Tiago Fiorini, Rubens Moreno De Freitas, Hsien Chung Chiu, Hari S. Prasad, Amanda N. Buxton, Ulf M.E. Wikesjö

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

Background: Recombinant human bone morphogenetic protein-2 in an absorbable collagen sponge carrier (rhBMP-2/ACS) has been shown to support significant bone formation when used to augment the maxillary sinus for implant dentistry. Nevertheless, bone biomaterials have been suggested to extend rhBMP-2/ACS with limited support of the merits of such approaches. Objectives: To evaluate local bone formation/dental implant osseointegration following implantation of rhBMP-2/ACS combined with a ceramic bone biomaterial using a mini-pig sinus augmentation model. Methods: Twelve adult Göttingen mini-pigs received rhBMP-2/ACS (rhBMP-2 adjusted to 0.43 mg/cc) alone or combined with an off-the- shelf biphasic ceramic (15%/85% HA/ß-TCP) biomaterial at 3:1, 1:1 and 1:3 ratios randomized to contra-lateral maxillary sinus sites yielding rhBMP-2/ACS fractions of 100%, 75%, 50% and 25%, respectively. A 4-cc implant volume was used for all sites. Two threaded dental implants (ø4.0 × 11.5 mm) were placed at each site. The animals were euthanized at 8 weeks for histologic analysis. Results: Surgical execution and healing were generally uneventful, infraorbital local swelling was observed in all animals until suture removal. rhBMP-2/ACS combined with the ceramic biomaterial did not significantly enhance local bone formation (range 9.0 ± 1.5 to 9.7 ± 2.1 mm) compared with rhBMP-2/ACS alone (8.6 ± 1.1 mm; p > 0.05). Variations in rhBMP-2/ACS to ceramic matrix ratios yielding rhBMP-2 doses approximating 0.4, 0.9, 1.3 and 1.7 mg/sinus did not appreciably influence bone formation/osseointegration. Conclusions: Whereas rhBMP-2/ACS supports significant bone formation/osseointegration in the mini-pig sinus augmentation model and thus appears an effective alternative for sinus augmentation procedures, adding a ceramic biomaterial to rhBMP-2/ACS does not produce meaningful biological advantages.

Original languageEnglish (US)
Pages (from-to)1005-1013
Number of pages9
JournalJournal of Clinical Periodontology
Volume45
Issue number8
DOIs
StatePublished - Jan 1 2018

Keywords

  • BMP-2
  • Bone biomaterials
  • Sinus augmentation
  • Tissue engineering

ASJC Scopus subject areas

  • Periodontics

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    Susin, C., Lee, J., Fiorini, T., De Freitas, R. M., Chiu, H. C., Prasad, H. S., Buxton, A. N., & Wikesjö, U. M. E. (2018). Sinus augmentation using rhBMP-2/ACS in a mini-pig model: Influence of an adjunctive ceramic bone biomaterial. Journal of Clinical Periodontology, 45(8), 1005-1013. https://doi.org/10.1111/jcpe.12921