Kinematics and Muscle Strength in Two, Five or 10 Years Afther Total Hip Arthroplasty

Study Overview
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Brief Summary
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Introduction: Femoral and acetabular replacement is characterized as total hip arthroplasty (THA). It has been used as treatment of various pathologies of this joint. In the postoperative period, some studies have shown that strength, function, range of motion and lower limb mechanics remains altered for more than One year after THA in relation to the non-operated side. However, studies that have correlated kinematics and hip muscle strength in individuals who underwent THA for long time, do not exist in literature. Objective: to evaluate lower limb muscle strength and 2D kinematics during stair ascending and descending in patients undergoing total hip arthroplasty. Methods: Third individuals who underwent total hip arthroplasty (THA) will be recruited at two, five and 10 year postoperative periods. They were allocated in three groups: Group 1 (10n), subjects submitted to THA for two years, Group 2 (10n) subjects submitted to THA for five years, Group 3 (10n) subjects submitted to THA for 10 years and Group 4 (10n) subjects without orthopaedic afections, all will be evaluated for dynamometric isometric muscle strength and kinematic analysis of stair ascending and descending by a blinded physical Therapist.

Official Title
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Kinematics and Muscle Strength in Two, Five or 10 Years Afther Total Hip Arthroplasty: Comparison With Healthy Individuales Controlled Cross Sectional Study

Conditions
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Hip Osteoarthritis

Intervention / Treatment
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* Diagnostic Test: Gait and muscle strength will be assessed


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: The investigators will recruit 40 individuals who underwent total hip arthroplasty (THA) by the hospital hip surgery group in the periods of two, five and 10 years postoperatively Control group without orthopaedic afections. Inclusion criteria: patients submitted to total hip arthroplasty between two years (24 months - 35 months), five years (60 months - 71 months) and 10 years (120 months - 131 months), aged between 50 and 80 years and sign the terms of free and informed consent Exclusion Criteria: patients with a history of prosthesis dislocations or revision of arthroplasty hip or lower limb pain asymmetry of the lower limbs greater than two centimeters previous surgeries in the lower limbs limited range of motion in the hip joint use of antidepressive drugs or analgesics for continuous use Presence of neuromuscular pathologies and functional incapacity to perform the activities proposed in the Kinematics analysis.

Ages Eligible for Study
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Minimum Age: 60 Years
Maximum Age: 80 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| group 2 years<br>The group underwent total hip arthroplasty at 2 years | Diagnostic Test: Gait and muscle strength will be assessed<br>* The extensor moment of the hip during gait and evaluation of the muscular strength of the hip will be evaluated<br>|
| group 5 years<br>The group underwent total hip arthroplasty at 5 years | Diagnostic Test: Gait and muscle strength will be assessed<br>* The extensor moment of the hip during gait and evaluation of the muscular strength of the hip will be evaluated<br>|
| group 10 years<br>The group underwent total hip arthroplasty at 10 years | Diagnostic Test: Gait and muscle strength will be assessed<br>* The extensor moment of the hip during gait and evaluation of the muscular strength of the hip will be evaluated<br>|
| group control<br>healthy patients | Diagnostic Test: Gait and muscle strength will be assessed<br>* The extensor moment of the hip during gait and evaluation of the muscular strength of the hip will be evaluated<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| kinematic analysis of hip movements for flexion | Analysis of the movements of the hip - range of motion for flexion | evaluated at 10 years after hip arthroplasty | 
| kinematic analysis of hip movements for extension | Analysis of the movements of the hip - range of motion for extension | evaluated at 10 years after hip arthroplasty | 
| kinematic analysis of hip movements for internal rotation | Analysis of the movements of the hip - range of motion for internal rotation | evaluated at 10 years after hip arthroplasty | 
| kinematic analysis of hip movements external rotation | Analysis of the movements of the hip - range of motion for external rotation | evaluated at 10 years after hip arthroplasty |