Poly (Propylene Fumarate) (PPF), a novel, bulk erosion, biodegradable polymer, has been shown to have osteoconductive effects in vivo when used as a bone regeneration scaffold (Peter, S. J., Suggs, L. J., Yaszemski, M. J., Engel, P. S., and Mikos, A. J., 1999, J. Biomater. Sci. Polym. Ed., 10, pp. 363–373). The material properties of the polymer allow it to be injected into irregularly shaped voids in vivo and provide mechanical stability as well as function as a bone regeneration scaffold. We fabricated a series of biomaterial composites, comprised of varying quantities of PPF, NaCl and β-tricalcium phosphate (β-TCP), into the shape of right circular cylinders and tested the mechanical properties in four-point bending and compression. The mean modulus of elasticity in compression was 1204.2 MPa (SD 32.2) and the mean modulus of elasticity in bending was 1274.7 MPa (SD 125.7). All of the moduli were on the order of magnitude of trabecular bone. Changing the level of NaCl from 20 to 40 percent, by mass, did not decrease and significantly, but did decrease bending and compressive strength significantly. Increasing the β-TCP from 0.25 g/g PPF to 0.5 g/g PPF increased all of the measured mechanical properties of PPF/NVP composites. These results indicate that this biodegradable polymer composite is an attractive candidate for use as a replacement scaffold for trabecular bone. [S0148-0731(00)01203-6]
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June 2000
Technical Briefs
Mechanical Properties of a Biodegradable Bone Regeneration Scaffold
B. D. Porter,,
B. D. Porter,
Departments of Orthopedic Surgery and Bioengineering, Mayo Clinic, 200 First Street SW, Rochester, MN 55905
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J. B. Oldham,,
J. B. Oldham,
Departments of Orthopedic Surgery and Bioengineering, Mayo Clinic, 200 First Street SW, Rochester, MN 55905
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S.-L. He, and,
S.-L. He, and
Departments of Orthopedic Surgery and Bioengineering, Mayo Clinic, 200 First Street SW, Rochester, MN 55905
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M. E. Zobitz,
M. E. Zobitz
Departments of Orthopedic Surgery and Bioengineering, Mayo Clinic, 200 First Street SW, Rochester, MN 55905
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R. G. Payne,
R. G. Payne
Department of Bioengineering, Institute of Biosciences and Bioengineering, Rice University, Houston, TX 77005
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K. N. An and,
K. N. An and
Departments of Orthopedic Surgery and Bioengineering, Mayo Clinic, 200 First Street SW, Rochester, MN 55905
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B. L. Currier,
B. L. Currier
Departments of Orthopedic Surgery and Bioengineering, Mayo Clinic, 200 First Street SW, Rochester, MN 55905
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A. G. Mikos and,
A. G. Mikos and
Department of Bioengineering, Institute of Biosciences and Bioengineering, Rice University, Houston, TX 77005
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M. J. Yaszemski
M. J. Yaszemski
Department of Bioengineering, Institute of Biosciences and Bioengineering, Rice University, Houston, TX 77005
11
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B. D. Porter,
Departments of Orthopedic Surgery and Bioengineering, Mayo Clinic, 200 First Street SW, Rochester, MN 55905
J. B. Oldham,
Departments of Orthopedic Surgery and Bioengineering, Mayo Clinic, 200 First Street SW, Rochester, MN 55905
S.-L. He, and
Departments of Orthopedic Surgery and Bioengineering, Mayo Clinic, 200 First Street SW, Rochester, MN 55905
M. E. Zobitz
Departments of Orthopedic Surgery and Bioengineering, Mayo Clinic, 200 First Street SW, Rochester, MN 55905
R. G. Payne
Department of Bioengineering, Institute of Biosciences and Bioengineering, Rice University, Houston, TX 77005
K. N. An and
Departments of Orthopedic Surgery and Bioengineering, Mayo Clinic, 200 First Street SW, Rochester, MN 55905
B. L. Currier
Departments of Orthopedic Surgery and Bioengineering, Mayo Clinic, 200 First Street SW, Rochester, MN 55905
A. G. Mikos and
Department of Bioengineering, Institute of Biosciences and Bioengineering, Rice University, Houston, TX 77005
M. J. Yaszemski
11
Department of Bioengineering, Institute of Biosciences and Bioengineering, Rice University, Houston, TX 77005
Contributed by the Bioengineering Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS. Manuscript received by the Bioengineering Division October 31, 1999; revised manuscript received February 6, 2000. Associate Technical Editor: R. Vanderby, Jr.
J Biomech Eng. Jun 2000, 122(3): 286-288 (3 pages)
Published Online: February 6, 2000
Article history
Received:
October 31, 1999
Revised:
February 6, 2000
Citation
Porter, , B. D., Oldham, , J. B., He, and , S., Zobitz, M. E., Payne, R. G., An and , K. N., Currier, B. L., Mikos and , A. G., and Yaszemski, M. J. (February 6, 2000). "Mechanical Properties of a Biodegradable Bone Regeneration Scaffold." ASME. J Biomech Eng. June 2000; 122(3): 286–288. https://doi.org/10.1115/1.429659
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