Abstract
| Original language | English |
|---|---|
| Title of host publication | Degradable polymers for skeletal implants |
| Editors | P.I.J.M. Wuisman, T.M. Smit |
| Place of Publication | New York |
| Publisher | Nova Publishers |
| Pages | 21-39 |
| Number of pages | 19 |
| ISBN (Print) | 978-1-60692-426-6 |
| Publication status | Published - 2009 |
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Time-dependent failure in load-bearing polymers : a potential hazard in structural applications of polylactides. / Govaert, L.E.; Engels, T.A.P.; Söntjens, S.H.M.; Smit, T.H.
Degradable polymers for skeletal implants. ed. / P.I.J.M. Wuisman; T.M. Smit. New York : Nova Publishers, 2009. p. 21-39.Research output: Chapter in Book/Report/Conference proceeding › Chapter › Academic
TY - CHAP
T1 - Time-dependent failure in load-bearing polymers : a potential hazard in structural applications of polylactides
AU - Govaert, L.E.
AU - Engels, T.A.P.
AU - Söntjens, S.H.M.
AU - Smit, T.H.
PY - 2009
Y1 - 2009
N2 - Polylactides are commonly praised for their excellent mechanical properties (e.g. a high modulus and yield strength). In combination with their bioresorbability and biocompatibility, they are considered prime candidates for application in load-bearing biomedical implants. Unfoliunately, however, their long-term performance under static load is far from impressive. In a previous in vivo study on degradable polylactide spinal cages in a goat model it was observed that, although short-term mechanical and real-time degradation experiments predicted otherwise, the implants failed prematurely under the specified loads. In this chapter we demonstrate that this premature failure is attributed to the time-dependent character of the material used . The phenomenon is common to all polymers, and finds its origin in stressactivated segmental molecular mobility leading to a steady rate of plastic flow. The main conclusion is that knowledge of the instantaneous strength of a polymeric material is insufficient to predict its long-term performance.
AB - Polylactides are commonly praised for their excellent mechanical properties (e.g. a high modulus and yield strength). In combination with their bioresorbability and biocompatibility, they are considered prime candidates for application in load-bearing biomedical implants. Unfoliunately, however, their long-term performance under static load is far from impressive. In a previous in vivo study on degradable polylactide spinal cages in a goat model it was observed that, although short-term mechanical and real-time degradation experiments predicted otherwise, the implants failed prematurely under the specified loads. In this chapter we demonstrate that this premature failure is attributed to the time-dependent character of the material used . The phenomenon is common to all polymers, and finds its origin in stressactivated segmental molecular mobility leading to a steady rate of plastic flow. The main conclusion is that knowledge of the instantaneous strength of a polymeric material is insufficient to predict its long-term performance.
M3 - Chapter
SN - 978-1-60692-426-6
SP - 21
EP - 39
BT - Degradable polymers for skeletal implants
A2 - Wuisman, P.I.J.M.
A2 - Smit, T.M.
PB - Nova Publishers
CY - New York
ER -