Clinical significance of three-dimensional CT reconstruction for periacetabular osteotomy / 上海第二医科大学学报

ABSTRACT

Objective To provide anatomical evidence for a safe osteotomy line and direction in periacetabular osteotomy.Methods The pelvic CT images of 18 adults were obtained.With the help of Mimics software,three-dimensional CT reconstruction was performed,and periacetabular osteotomy was simulated.The length of osteotomy lines on the ilium,ischium and iliac columna posterior was measured,and the relationship between osteotomy lines and anatomic landmarks was explored. Results The length of osteotomy lines on the ilium,ischium and iliac columna posterior was(50.96?7.09) mm,(36.46?5.92)mm and(55.28?6.42) mm,respectively.The angles between the osteotomy line on the ilium and that on the iliac columna posterior,between the osteotomy line on the ischium and that on the iliac columna posterior,and between the osteotomy line on the iliac columna posterior and quadrilateral surface were 120.21??5.96?,115.49??6.46? and 60.31??4.96?,respectively.And the real periacetabular osteotomy has been performed on the pelvic specimens for verification.The vertical distances between the ending point of osteotomy line on the ilium and iliopectineal line,between osteotomy line on the ischium and iliopectineal line,and between the osteotomy line on the iliac columna posterior and greater sciatic notch were(11.98?5.26) mm,(45.08?8.59) mm and(18.52?6.49) mm,respectively. Conclusion The length and angles of osteotomy lines in periacetabular osteotomy can be well measured by three-dimensional reconstruction,and the relationship between the osteotomy lines and anatomic landmarks can also be well displayed,which provides anatomical data for the clinical application of periacetabular osteotomy.