Decreasing muscle strength is very common in the elderly population, leading to the risk of dislocation after hip arthroplasty. The purpose of this prospective cohort study was to determine the effects of biomimetic artificial hip arthroplasty combined with the modified Hardinge approach on safety, functional rehabilitation, and prognostic activity of daily living (ADL) in the elderly patients with decreasing muscle strength. Indicators included the Lovett muscle strength grading of the hip joint, hip range of motion (ROM), Harris score of hip joint function, and Barthel ADL score for the prognosis. The results showed that there were no differences in hip ROMs between the affected side and contralateral side from the discharging day, to 3 months, to 6 months after surgery, that there were no differences in the Harris scores, muscle strengths, and Barthel ADL scores between the affected side and pre-injury/contralateral side from 3 to 6 months after surgery, and that all of the patients did not experience postoperative dislocation during the follow-up. It suggests that the biomimetic hip arthroplasty combined with the modified Hardinge approach has the effects of promoting early rehabilitation, ensuring normal ROM, while avoiding the postoperative dislocation in elderly patients with decreasing muscle strength, and that patients can restore the pre-injury hip function and ADL within 3 months in post-operation.

rehabilitation assessment for elderly patients  /  prognostic ability of daily living  /  senile sarcopenia; dual-articulation biomimetic hip arthroplasty  /  postoperative dislocation of hip arthroplasty  /  modified Hardinge approach  /  Harris score