Abstract:

BACKGROUND: Femoral neck is resected in total hip replacement, which can change the force balance between pressure system and tensile stress system. Femoral neck preservation can maintain natural bone structure of femoral neck, keep the stress distributing along proximal end of femoral neck, and prevent prosthesis loosening result from osteoporosis at the proximal end of femoral neck.
OBJECTIVE: To evaluate the effect of femoral neck preservation on total hip replacement.
METHODS: Femoral neck preservation in total hip replacement was performed on 42 cases (52 hips) from March 2003 to April 2008. S-ROM prosthesis (Acetabular and femur part) was used in the operation. The operation duration, blood loss, average postoperative hospitalization, Harris scores and perioperative complications were observed. X-ray film was performed after replacement. The abduction angle and anteversion angle of the acetabular prosthesis was measured.
RESULTS AND CONCLUSION: All the cases were followed up for 12-61 months with the average of 39 months. The operation duration was 30-70 minutes with the average of 45 minutes, and the blood loss was 70-200 mL with the average of 110 mL. Postoperative X-ray film showed that the abduction angle was 44.1° and the anteversion angle was 21°. All the patients were ambulatory 5 days after surgery with the help of walker. The preoperative Harris hip score was (32.7±6.3), which was (93.2±4.1) at 3 months after operation. Total hip replacement with preservation of femoral neck has the advantages of minimal invasion, less blood loss, good biodynamic harmony, excellent stability of the prosthetic hip, and less prosthesis wear. It can replace traditional total hip arthroplasty as a new option.