We found moderate to strong evidence that no adverse effects on subsidence and osseous integration of the femoral stem after uncemented THA occur after immediate UWB .
The aim of this systematic review was to find evidence -based support in the literature to allow immediate unrestricted weight bearing after  primary uncemented total hip arthroplasty ( THA ) .
Accelerated rehabilitation programs for THA are becoming increasingly popular to shorten hospital stay and to facilitate rapid restoration of function .
The goals of these rehabilitation programs could be more easily achieved if immediate unrestricted weight bearing ( UWB ) could be allowed after a THA .
So far , however , immediate weight bearing is frequently contraindicated in widely accepted protocol s for uncemented THA due to fear for subsidence and absence of osseous integration of the femoral stem .
Thus , frequently protected weight bearing and restricted activities are still advocated for at least 6 weeks after surgery .
In addition , we analyzed the literature to come to a recommendation on gait pattern and walking aid .
Effects of a late-phase exercise program after total hip arthroplasty: a randomized controlled trial.
OBJECTIVE To investigate the effects of a late-phase exercise program for patients who underwent total hip arthroplasty ( THA ) 4 to 12 months earlier . DESIGN A single-blind , r and omized controlled trial . SETTING Exercises were performed in subjects ' homes . Exercise instruction and measurements taken before and after the trial were performed in an outpatient research and treatment center . PARTICIPANTS Convenience sample of 34 adults 4 to 12 months post-THA r and omly allocated to experimental or control groups . Twenty-eight subjects completed the study . INTERVENTION An 8-week , hip-exercise intervention , during which the control group received basic isometric and active range of motion exercises ; the experimental group received strength and postural stability exercises . MAIN OUTCOME MEASURES Score on the 12-Item Hip Question naire ; fear of falling ; hip flexor , extensor , abductor , and knee extensor muscle torque ; and postural stability in single stance . RESULTS There was a statistically significant improvement in all measures of self-perceived function , muscle strength ( hip flexors , 24.4 % ; hip extensors , 47.8 % ; hip abductors , 41.2 % ; knee extensors , 23.4 % ) , and postural stability ( 36.8 % ) in the experimental group and no significant change in the control group . Neither group had statistically significant changes in fear of falling measures . CONCLUSIONS An exercise program emphasizing weight bearing and postural stability significantly improved muscle strength , postural stability , and self-perceived function in patients 4 to 12 months after THA
We found moderate to strong evidence that no adverse effects on subsidence and osseous integration of the femoral stem after uncemented THA occur after immediate UWB .
The aim of this systematic review was to find evidence -based support in the literature to allow immediate unrestricted weight bearing after  primary uncemented total hip arthroplasty ( THA ) .
Accelerated rehabilitation programs for THA are becoming increasingly popular to shorten hospital stay and to facilitate rapid restoration of function .
The goals of these rehabilitation programs could be more easily achieved if immediate unrestricted weight bearing ( UWB ) could be allowed after a THA .
So far , however , immediate weight bearing is frequently contraindicated in widely accepted protocol s for uncemented THA due to fear for subsidence and absence of osseous integration of the femoral stem .
Thus , frequently protected weight bearing and restricted activities are still advocated for at least 6 weeks after surgery .
In addition , we analyzed the literature to come to a recommendation on gait pattern and walking aid .