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Osteoconduction of impacted porous titanium particles with a calcium‐phosphate coating is comparable to osteoconduction of impacted allograft bone particles: In vivo study in a nonloaded goat model
Author(s) -
Walschot Lucas H. B.,
Aquarius René,
Schreurs Barend W.,
Verdonschot Nico,
Buma Pieter
Publication year - 2012
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.32716
Subject(s) - materials science , coating , calcium , biomedical engineering , in vivo , titanium , femur , cancellous bone , apatite , dentistry , composite material , chemistry , anatomy , surgery , mineralogy , metallurgy , medicine , microbiology and biotechnology , biology
Aims: Impaction grafting restores bone defects in hip arthroplasty. Defects are reconstructed with bone particles (BoP) as substitute materials with adequate mechanical and biological properties are not yet available. Ceramic particles (CeP) have mechanical drawbacks as opposed to porous titanium particles (TiP). In this in vivo study, bone ingrowth and bone volume in coated and noncoated TiP were compared to porous biphasic calcium‐phospate CeP and allograft BoP. Coatings consisted of silicated calcium‐phosphate and carbonated apatite. Materials were implanted in goats and impacted in cylindrical defects (diameter 8 mm) in the cancellous bone of the femur. On the basis of fluorochrome labeling and histology, bone ingrowth distance was measured at 4, 8, and 12 weeks. Cross‐sectional bone area was measured at 12 weeks. Findings: TiP created a coherent matrix of entangled particles. CeP pulverized and were noncoherent. Bone ingrowth in TiP improved significantly by the coatings to levels comparable to BoP and CeP. Cross‐sectional bone area was smaller in CeP and TiP compared to BoP. Conclusions: The osteoconductive properties of impacted TiP with a calcium‐phosphate coating are comparable to impacted allograft bone and impacted biphasic ceramics. A more realistic loaded in vivo study should prove that coated TiP is an attractive alternative to allograft bone. © 2012 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 100B: 1483–1489, 2012.