Nanocrystalline Hydroxyapatite–Poly(thioketal urethane) Nanocomposites Stimulate a Combined Intramembranous and Endochondral Ossification Response in Rabbits
| Autor: | Scott A. Guelcher, Craig L. Duvall, Jeffry S. Nyman, Madison A.P. McGough, Daniel A. Shimko, Lauren A. Boller, Joseph C. Wenke, Jonathan G. Schoenecker, Rhodes Cheyenne S, Dustin M. Groff |
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| Rok vydání: | 2019 |
| Předmět: |
musculoskeletal diseases
Thioketal Polyurethanes 0206 medical engineering Biomedical Engineering 02 engineering and technology Urethane Article Nanocomposites Biomaterials chemistry.chemical_compound Osteogenesis Animals Bone formation Endochondral ossification Nanocomposite technology industry and agriculture equipment and supplies 021001 nanoscience & nanotechnology Bone cement 020601 biomedical engineering Nanocrystalline material Resorption Durapatite surgical procedures operative chemistry Intramembranous ossification Rabbits 0210 nano-technology Biomedical engineering |
| Zdroj: | ACS Biomater Sci Eng |
| ISSN: | 2373-9878 |
| DOI: | 10.1021/acsbiomaterials.9b01378 |
| Popis: | Resorbable bone cements are replaced by bone osteoclastic resorption and osteoblastic new bone formation near the periphery. However, the ideal bone cement would be replaced by new bone through processes similar to fracture repair, which occurs through a variable combination of endochondral and intramembranous ossification. In this study, nanocrystalline hydroxyapatite (nHA)-poly(thioketal urethane) (PTKUR) cements were implanted in femoral defects in New Zealand White rabbits to evaluate ossification at 4, 12, and 18 months. Four formulations were tested: an injectable, flowable cement and three moldable putties with varying ratios of calcium phosphate to sucrose granules. New bone formation and resorption of the cement by osteoclasts occurred near the periphery. Stevenel’s Blue and Safranin O staining revealed infiltration of chondrocytes into the cements and ossification of the cartilaginous intermediate. These findings suggest that nHA-PTKUR cements support combined intramembranous and endochondral ossification, resulting in enhanced osseointegration of the cement that could potentially improve patient outcomes. |
| Databáze: | OpenAIRE |
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