| 摘要 |
<p>The apparatus has an adjustable circular sector, linear displacement and angular rotation systems. The sector is divided into two sections which slide relative to one another and are connected indirectly to bone pins. It also has a curved arm (60) with its two ends equipped with pivoting plates (70, 80), one plate co-operating with the linear displacement system (10, 20, 30) and the other with the adjustable sector (90, 100); the two plates are connected to drives which permit a gradual rotation. The curved arm is made from a material which is transparent to X-rays, and the axes of the two pivoting plates are aligned with the fracture site, with the axis of the circular sector located upon it. The linear displacement system comprises three telescopic bars (10, 20, 30) connected by mobile couplings (40, 50). Each bar has an internal tube marked with a millimetre scale and an external one with arrows to indicate movement of the bone fragments.</p> |
