Accuracy of CT for measuring femoral neck anteversion in children with developmental dislocation of the hip verified using 3D printing technology.

摘要: Accurate femoral neck anteversion angle (FNA) measurement is of great significance in the diagnosis and treatment developmental dysplasia hip (DDH) children. The FNA still remains a controversy. We aimed to verify accuracy our CT method by 3D printing technology evaluate its clinical value. Sixty-eight children with unilateral DDH were enrolled, their was measured using 2D-CT 3D-CT, respectively, three observers. This procedure repeated 3 months later. above outcomes then compared results 3D-printed femur (3D-PF) model. 3D-PF model observers (two radiologists one orthopedist; all professors) collectively through electronic instrument. primary at affected hips 44.0 ± 6.1, 49.5 8.9, 52.8 7.9°, respectively. On it 47.6 5.4, 49.3 6.8, 48.6 6.2°. Three later, on 10.5, 42.8 7.4, 45.1 9.3°, 48.0 6.5, 48.9 7.2, 49.0 5.7° unaffected 48.5 6.6 36.9 13.1°. There significant differences between measurements, but no difference found 3D-CT measurements. showed among groups groups. However, had or study that more precise, reproducible for DDH. 11.6° larger than aged 3–8 years.