Changes of the Single Limb Standing Balance After Total Knee Arthroplasty in Degenerative Osteoarthritis

Study Overview
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Brief Summary
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It was well known that total knee arthroplasty could improve the previously impaired proprioception in degenerative osteoarthritis. Most current researches have been focused on the change of the proprioception. However, the evaluation of the proprioception is based on the surrogated end. Double or single limb standing balance is considered functional scale. It is very important view for the prevention of slipping down injury in evidence-based approaches for knee osteoarthritis. Unfortunately, few study have been performed for figuring proprioceptive change after surgery out. Considering the similarity between the proprioception and the standing balance and reported positive result in proprioception after total knee arthroplasty, the investigators supposed that total knee arthroplasty might give an influence on the recovery of single limb standing balance.

Official Title
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Observational Study for Changes of the Single Limb Standing Balance After Total Knee Arthroplasty in Degenerative Osteoarthritis

Conditions
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Knee Osteoarthritis

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Medial compartment degenerative knee osteoarthritis showing the varus deformity Exclusion Criteria: History of surgery on the lower extremity except for arthroscopy or menisectomy Hip arthritis or, hip or back pain disturbing the standing History of participation in sport rehabilitation program within less than 6 months Presence of neurological or musculoskeletal disease disturbing the standing Patient to reject the participation
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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What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| single limb standing balance | migration distance of center of pressure while single limb standing was recorded through balance performance monitoring | from issuing admision paper before the surgery up to 4 weeks, average time of this measurement is 2 weeks | 
| single limb standing balance | migration distance of center of pressure while single limb standing was recorded through balance performance monitoring | from the surgery until the time in which patient shows the same pain score as the pre-operation pain score up to the post-operative 4 weeks, average time of this measurement is post-operative 2 weeks | 
| single limb standing balance | migration distance of center of pressure while single limb standing was recorded through balance performance monitoring | post-operative 6 months | 
| single limb standing balance | migration distance of center of pressure while single limb standing was recorded through balance performance monitoring | post-operative 12 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| balance index | balance index, calculated ratio from the deviated distance and time from the neutral point, was collected by using the Biodex machine | from issuing admision paper before the surgery up to 4 weeks, average time of this measurement is 2 weeks | 
| balance index | balance index, calculated ratio from the deviated distance and time from the neutral point, was collected by using the Biodex machine | post-operative 6 months | 
| balance index | balance index, calculated ratio from the deviated distance and time from the neutral point, was collected by using the Biodex machine | post-operative 12 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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knee osteoarthritis arthroplasty postural balance