新型生物材料腕舟骨假体的Prescale胶片测量

目的：使用纳米羟基磷灰石/聚酰胺仿生材料腕舟骨假体重建腕舟骨后,用Prescale测量胶片测量腕关节的生物力学性能。方法：分别使用12具新鲜腕关节标本,在纳米羟基磷灰石/聚酰胺仿生材料腕舟骨假体重建腕舟骨前后,使用力学试验机施加50N至250N的外力,用Prescale测量胶片测量腕关节的应力分布。结果：纳米羟基磷灰石/聚酰胺仿生材料腕舟骨假体重建腕舟骨后,桡腕关节在50N至250N的外力作用下,平均受力依次为0.55±0.02Mpa,0.59±0.04Mpa,0.65±0.02Mpa,0.71±0.02Mpa,0.70±0.01 Mpa,同正常组相比无明显差异（P〉0.05）。结论：纳米羟基磷灰石/聚酰胺仿生材料腕舟骨假体重建腕舟骨后,腕关节的应力分布同正常情况接近。

Measurement of the new biological prosthesis of scaphoid using prescale film

Objective：To measure the biomechanical properties of the wrist after the reconstruction of scaphoid with nano-hydroxyapatite/polyamide biomaterial prosthesis using Prescale Film.Methods：The scaphoid of twelve fresh cadaveric wrists were reconstructed with nano-hydroxyapatite/polyamide biomaterial prosthesis.50N to 250N loads were applied to the cadaveric wrists.The stress distribution of the wrist joint were measured using Prescale Film.Results：After the reconstruction of scaphoid,under the loads of 50N to 250N,the mean loads of radialcarpal joint were 0.55±0.02 Mpa,0.59±0.04 Mpa,0.65±0.02 Mpa,0.71±0.02 Mpa,0.70±0.01 Mpa.There were no significant differences compared with the nomarl situation（P0.05）.Conclusion：The stress distribution of the wrist changed did not changed significantly after the reconstruction of scaphoid with nano-hydroxyapatite/polyamide biomaterial prosthesis.