Gait Analyses After Resurfacing Hip Arthroplasty Versus Metal on Metal Total Hip Arthroplasty, an Exploratory Study

Study Overview
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Brief Summary
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Total hip replacement surgery is a very successful operation with good long-term results. Hip resurfacing arthroplasty is offered as a treatment option for young and active patients with osteoarthritis of the hip. It has been proposed as a treatment option for younger patients because of claims that it preserves femoral bone stock and has better functional outcomes. The assessment of gait after hip replacement surgery may be able to determine functional differences between patients who have undergone total hip replacement / arthroplasty (THA) versus hip resurfacing.

Detailed Description
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A group of 58 patients, part of a ungoing randomized trial comparing resurfacing hip arthroplasty to metal-on-metal total hip arthroplasty, will be invited to a single gait analysis on a trendmill. All patients have reached a follow up of five years. Patient 's gait will be assessed during two walking sessions, in both sessions spatio-temporal, kinetic and kinematic parameters will be recorded. At first when flat walking with increasing speeds to their top walking speed. Secondly: when walking at a fixed speed with an increasing incline to their top walking incline.

Official Title
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Gait Analyses After Resurfacing Hip Arthroplasty Versus Metal on Metal Total Hip

Conditions
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Difficulty Walking, Gait, Stumbling

Intervention / Treatment
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* Other: Gait analysis on a trendmill


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patient part of randomised controlled trial (RCT) of hip resurfacing versus MoM total hip arthroplasty for symptomatic osteoarthritis of the hip Patient must be able to consent to the study (written informed consent) Patients who are functioning well post-operatively and not under routine follow up Patients who are able to walk without any safety rail assistance on the treadmill Exclusion Criteria: Patient not originally randomised during an RCT of hip resurfacing versus MoM total hip arthroplasty Patients who suffer from any neurological or musculoskeletal conditions that might make a gait test dangerous. Patients whose cognitive function prevents them from understanding the study Patients who have had or are awaiting revision surgery for their hip

Ages Eligible for Study
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Minimum Age: 40 Years
Maximum Age: 75 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Basic Science
Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Total Hip Arthroplasty<br>Gait analysis on a trendmill of patients with a well functioning total hip arthroplasty on a trendmill | Other: Gait analysis on a trendmill<br>* Gait analysis on a trendmill GRAIL to analyse spatio-temporal kinetics and kinematics when flat walking and inclining<br>* Other names: Gait realtime analysis interactive lab: MOTEK Medical;|
| Active Comparator: Resurfacing Hip Arthroplasty<br>Gait analysis on a trendmill of patients with a well functioning resurfacing hip arthroplasty on a trendmill | Other: Gait analysis on a trendmill<br>* Gait analysis on a trendmill GRAIL to analyse spatio-temporal kinetics and kinematics when flat walking and inclining<br>* Other names: Gait realtime analysis interactive lab: MOTEK Medical;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Top walking speed | Mean top walking speed in kilometers / hour assessed on a trendmill | 5 years postoperative | 
| Walking cadence | Mean steps / minute at top walking speed assessed on a trendmill | 5 years postoperative | 
| Step length | Mean step distance in meters at top walking speed assessed on a trendmill | 5 years postoperative | 
| Maximum Push off force (N/kg) per cycle | Mean ground reaction forces in Newton / kilogram on a trendmill | 5 years postoperative | 
| Maximum weight acceptance (N/kg) per cycle | Mean ground reaction forces assessed on a trendmill | 5 years postoperative | 
| Mid-stance force (N/kg) per cycle | Mean ground reaction forces assessed on a trendmill | 5 years postoperative | 
| Hip maximum flexion/extension per cycle | Mean hip kinematics in degrees assessed on a trendmill | 5 years postoperative | 
| Hip maximum internal/external rotation per cycle | Mean hip kinematics in degrees assessed on a trendmill | 5 years postoperative | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Postoperative hip functionality after hip arthroplasty. | Postoperative hip function according the Harris Hip Score and Western Ontario and McMaster Universities Osteoarthritis Index | 5 years postoperative | 
| General Health according EurQol-5D | Health outcome on the EQ-5D questionairre | 5 years postoperative | 
| Physical activity level according the UCLA-activity score | The University of California at Los Angeles (UCLA) activity score | 5 years postoperative | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Gait disorder, Resurfacing Hip Arthroplasty, Total Hip Arthroplasty