Effect of femoral prosthesis on proximal femoral reconstruction in total hip arthroplasty (THA) with different neck stem angle
MAO Rui-jun
Abstract：Objective To investigate the influence of femoral neck prosthesis on the anatomical reconstruc-tion of the proximal femur in total hip arthroplasty ( THA) . Methods A retrospective analysis of 80 cases who un-derwent THA between Jan. 2014 and Jan. 2015 in Department of Orthopedics in Zhongshan Hospital Affiliated to Dalian University was carried out. According to its use of different collodiaphyseal angle of femoral prosthesis during the operation,they were divided into two groups. The study group was treated by femoral stem with the collodiaphy-seal angle of 135°,and the control group was treated by femoral stem with the neck stem angle of 127°. The change value of the femoral offset(xFO),the ratio of xFO to the offset of the contralateral side(sdFO),the center of the femoral head height,overall eccentricity,difference of the lower limb length before and after surgery (1,3,6,12 months) and Harris score of patients in the two groups were detected and recorded. Results The xFO and sdFO index of the study group (1. 8 ± 4. 6),(8. 9 ± 12. 6) were lower than those in the control group of (5. 9 ± 4. 8), (20. 4 ± 17. 5), and the difference was statistically significant (P<0. 05). The femoral head center height and o-verall eccentricity in the study group were (4566. 5 ± 32. 6) and (65. 5 ± 11. 4)mm, respectively,while in the con-trol group were (4579. 5 ± 37. 6) and (69. 4 ± 12. 6)mm,respectively. There was no significant difference between the two groups (P>0. 05). At 1,3,6 and 12 months after operation,the length of the lower limbs and the Harris score in the two groups were significantly improved compared with before operation ( P<0. 05 ) . The Harris scores of two groups were not statistically significan (P>0. 05). After the operation,patients in the study group did not have any discomfort. Six months after surgery,3 cases in the control group had greater trochanter pain,and the difference between the two groups was significanct(P<0. 05). Conclusion Femoral prosthesis with neck stem an-gle of both 127 ° and 135 °in THA can achieve good early functional recovery,and angle of 135 °can reconstruct the proximal femoral anatomy better.
Keywords：total hip arthroplastyneck stem anglefemoral prosthesisproximal femuranatomical recon-struction
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 746-749 )