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目的探讨发育性髋关节脱位患儿股骨颈前倾角的数字化测量方法,为股骨近端截骨手术提供解剖学依据。方法收集单侧发育性髋关节脱位儿20例,其中男10例,女10例,应用Mimics15.0软件,利用数字化三维重建技术重建股骨,标定相关解剖标志测量患侧及健侧股骨颈前倾角,并与在断层CT上测量的股骨颈前倾角相比较。结果重建的股骨数字化虚拟可视模型能够从多角度、多平面进行观察及测量,二维CT测量健侧和患侧股骨颈前倾角分别为(25.54±7.17)°和(42.98±10.36)°,数字化三维重建测量健侧和患侧股骨颈前倾角分别为(24.29±3.46)°和(40.36±5.42)°。数字化三维重建股骨颈前倾角与二维CT测量的数值差异有统计学意义(P<0.05)。结论基于三维CT扫描的股骨数字化三维重建图像具有良好的形态和清晰的边界,可精确识别出股骨前倾角的解剖数据,为完成个体化的股骨截骨术提供了新的方法。
Objective To investigate the digital measurement of femoral neck anteversion in children with developmental dislocation of the hip to provide an anatomical basis for proximal osteotomy. Methods Twenty children with unilateral developmental dislocation of the hip were collected, including 10 males and 10 females. Mithics15.0 software was used to reconstruct the femur using digital three-dimensional reconstruction technique. The anatomic landmarks were measured and the femoral neck anteversion angles And compared with femoral neck anteversion measured on CT. Results The reconstructed femur digital virtual visual model was able to observe and measure from multi-angle and multi-plane. The anterior-posterior femoral neck anteversion angle was (25.54 ± 7.17) ° and (42.98 ± 10.36) ° in two-dimensional CT, Digitized three-dimensional reconstruction measurements of contralateral and anterior femoral neck anteversion were (24.29 ± 3.46) ° and (40.36 ± 5.42) °. There was significant difference between the anterior femoral neck anteversion and two-dimensional CT in digital three-dimensional reconstruction (P <0.05). Conclusion The three-dimensional CT scan of the digital three-dimensional reconstruction of femur images with good shape and clear boundaries, can accurately identify the anatomical data of femoral anteversion, and provide a new method for the completion of individual femoral osteotomy.