Anatomic Study On The Puncture Sit Of The Percutaneous Acetabular Reconstruction

Objective: To discuss the optimal puncture point and depth of percutaneous acetabulum forming operation for treatment of acetabular tumor on the basis of anatomical research. Methods: choose 30 adult pelvis and hip specimens without muscle fixed with formol and 2 complete cadavers were anatomized and measured. Setting the central of acetabulum as point O, from the point O, let a vertical line intersected line which goes through the point of spina iliaca anterior superior and the point O, respectively generating intersecting point A 、B on acetabular margin, dividing the acetabulum into four quadrants. The angle bisector of ∠AOB intersected with the edge of acetabulum generating intersecting point C. Based on the assumptions of acetabular vertice is 0 o’clock,measure the distance between the horizontal plane of trochanter vertice and the horizontal planes of point A、B、C and the thickness of acetabular posterior wall in the location of point A’、B’、C’ 10 mm away from point A、B、C. And then study results verified by the operation on the 2 complete cadavers. Results: The range of distance between point A’ and the femoral greater trochanter was 87.69±4.45 mm, The average for males was 34.9 mm, females 34.2 mm. Point B’ is located at the same position but for 10-11 o’clock location. The range of distance between point C’ located at 0 o’clock and the femoral greater trochanter was 33.8-42.5mm, The average for males was 36.7mm, females 35.5mm.The puncture point were the surface projecting points of A’、B’、C’, the depth of puncture for the 3 puncture point were respectively 6.7-8.4, 17.7-20.4 and 14.7-17.9mm,and the average value of it were respectively 7.5, 18.5 and 16.5 mm.Conclusions: A’, B’, C’3 points are the optimal puncture point of percutaneous acetabulum forming operation with shorter distance to the tumor in the posterosuperior quadrant of the acetabulum.