Total hip replacement (THR) is being considered as one of the most effective medical procedures. Since its introduction, there was a worldwide debate over proper implant selection in terms of size, bearing type and shape. The diameter of used femoral heads components grew throughout the years - from 22 mm in the 1960s to 32 mm in the 2000s, which is the most commonly used size nowadays. In recent years there was a visible use of large femoral heads (\>=36mm) in several registers. In the USA there was a significant grow in use of this heads rising from 1% in early 200s to even 58% in 2009. There is a strong evidence data and many researchers concerning range of movement, risk of dislocation, functional results, pain and prosthesis wear depending of femoral head size. In terms of gait characteristics there are several deviations reported concerning both patients with hip osteoarthritis (OA) and following THR. There is a lack of literature concerning influence of used implants on gait parameters and whether this goal of the surgery can be achieved. The aim of this study was to assess potential differences of lower limb biomechanics during gait in patients following total hip replacement surgery depending on femoral head diameter and compare them to the normal gait of healthy volunteers. As a secondary outcome authors wanted to inspect correlation between gait parameters and patient-reported outcome.
Age range
60 Years – 80 Years
Sex
ALL
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Time of swing phase
Timeframe: at least 3,5 years after surgery
Time of stance phase
Timeframe: at least 3,5 years after surgery
Time of double-stance phase
Timeframe: at least 3,5 years after surgery
Stride length
Timeframe: at least 3,5 years after surgery
Cadence
Timeframe: at least 3,5 years after surgery
Mean gait velocity
Timeframe: at least 3,5 years after surgery
Range of maximal hip extension for both limbs during ending part of mid-stance phase
Timeframe: at least 3,5 years after surgery
Range of pelvic drop in frontal plane on the opposite site of the bearing limb
Timeframe: at least 3,5 years after surgery