A Simple Method For Restoring The Femoral Head Center In Hip Arthroplasty: A Study Of 3D-CT Image Reconstruction In The Chinese Population

Background:Various authors have successfully demonstrated that the distance from the greater trochanter to the femoral head center(GTFHC)and the distance from the lesser trochanter to the femoral head center(LTFHC)can be used as parameters to determine the recovery of the femoral head center(FHC)during hip arthroplasty.However,current research on these parameters are mostly concentrated in American populations,It is necessary to undertake an anatomical study concerning the correlations between the greater trochanter,the lesser trochanter,and the FHC in Chinese population using data obtained from the 3D-CT reconstruction method.Methods:The CT data of 293 Chinese(151 males and 142 females,with an average age of65.06 years and a range of 21-93 years)without changes in the bone structure of the hip joint were selected for measurement.The femoral head diameter(FHD),the linear distance from FHC to LT(LTFHC),and the linear distance from FHC to GT(GTFHC)were all measured and recorded.The correlation between FHD with LTFHC and GTFHC was assessed using Pearson correlation coefcients,and the ratio of LTFHC and GTFHC to FHD was calculated.All measured parameters were compared between the left and right sides and the sexes of the participants.Results:The mean FHD was 47.26±3.41 mm,the distance LTFHC was 45.08±4.11 mm,and the distance GTFHC was 46.83±4.34 mm.The average ratios of LTFHC/FHD and GTFHC/FHD were 0.95 and 0.99,respectively.96% of the LTFHC had absolute lateral diferences of<4 mm.92% of the GTFHC had absolute lateral diferences of<4 mm.Conclusion:LTFHC and GTFHC are reliable reference parameters for preoperative planning and reconstruction of FHC during hip arthroplasty.In this study,CT three-dimensional reconstruction technique was used to evaluate the Chinese population for the first time,and a more accurate ratio of LTFHC,GTFHC and FHD was obtained,which can provide a reference for orthopedic doctors to reconstruct the FHC during hip arthroplasty in patients with femoral neck fracture.