3D femoral neck anteversion measurements based on the posterior femoral plane in ORTHODOC system.

摘要: This study provides a robust measuring method of the femoral neck anteversion angle for use in total hip replacement pre-planning program. The femora 24 patients (69.3 ± 6.3 years old) were CT-scanned and converted into three-dimensionally volume-rendered models ORTHODOC® (ISS Inc., CA, USA) which is software ROBODOC surgery. Mod.ISS (the modified ISS method), designed by authors, measures proximal-most confluence on plane perpendicular to mechanical axis. 3D FNC proposed authors present involves measurement three-dimensional center posterior parallel condylar Here, we found that interobserver reproducibility was 1.8°(SD = 1.3) 2.4˚(SD 1.9) method. local axis measured as θ˚ 25.3(L/D) − 5.4 L/D 0.1 ∼ 0.6, where distance (L) from along axis, normalized with respect diameter head (D). At 0.5, coincident average determined We conclude gold standard applicable during both pre-operative post-operative stages, because its can be space stages.