Maruyama T, Saha S, Mongiano D O, Mudge K
Department of Restorative Dentistry, School of Dentistry, Loma Linda University, California 92354, USA.
J Biomed Mater Res. 1996 Spring;33(1):9-12. doi: 10.1002/(SICI)1097-4636(199621)33:1<9::AID-JBM2>3.0.CO;2-W.
Self-reinforced polyglycolide (SR-PGA) rods have been used widely for fracture fixation as an alternative to metallic implants. However, because of its insufficient strength and strength retention, the use of SR-PGA has been restricted to fractures or osteotomies of low stress bearing cancellous bone. To investigate its usefulness in fixing the fractures of cortical bone, the mechanical strength of a human metacarpal fracture fixed with SR-PGA rods was evaluated. The surgical constructs were immersed in buffered saline solution and maintained at body temperature (37 degrees C). The mean initial bending stiffness of the specimens fixed with the SR-PGA rods was 61% of that of the specimens fixed with Kirschner wires. The bending stiffness of the specimens fixed with the SR-PGA rods decreased gradually, and most of the specimens lost their mechanical stability when immersed for 4 weeks. When SR-PGA rods are used to fix the fracture of human cortical bone, such as diaphyseal fracture of the metacarpal bone, it should be protected by additional means.
自增强聚乙交酯（SR-PGA）棒作为金属植入物的替代品已被广泛用于骨折固定。然而，由于其强度和强度保持不足，SR-PGA的使用仅限于低应力承载松质骨的骨折或截骨术。为了研究其在固定皮质骨骨折中的效用，对用SR-PGA棒固定的人掌骨骨折的机械强度进行了评估。手术构建体浸泡在缓冲盐溶液中并维持在体温（37摄氏度）。用SR-PGA棒固定的标本的平均初始弯曲刚度是用克氏针固定的标本的61%。用SR-PGA棒固定的标本的弯曲刚度逐渐降低，并且大多数标本在浸泡4周时失去了机械稳定性。当使用SR-PGA棒固定人皮质骨骨折，如掌骨干骨折时，应采用额外的方法进行保护。
