Claes L E
Abteilung für Unfallchirurgische Forschung und Biomechanik, Universität Ulm, Germany.
Clin Mater. 1992;10(1-2):41-6. doi: 10.1016/0267-6605(92)90083-6.
The mechanical properties of degradable implant materials are low in comparison to metals used in orthopaedic surgery. There are possibilities to improve the strength of degradable implants by self-fibre-reinforcement, high molecular weight or special manufacturing processes. However, the moduli of the materials cannot be increased significantly by these techniques. Comparison of the mechanical properties of the most important materials are shown. Creep and relaxation are characteristic properties of degradable materials and limit the use of load-carrying implants. The rate of degradation in vitro and in vivo shows larger differences between the various materials and range from a few weeks up to 3 years.
与骨科手术中使用的金属相比，可降解植入材料的机械性能较低。通过自纤维增强、高分子量或特殊制造工艺，有可能提高可降解植入物的强度。然而，这些技术无法显著提高材料的模量。文中展示了最重要材料的机械性能比较。蠕变和松弛是可降解材料的特性，限制了承载植入物的使用。各种材料在体外和体内的降解速率差异较大，从几周到3年不等。
