Kinematic Comparison of Vanguard XP and Vanguard CR Total Knee Arthroplasties

Hvidovre University Hospital

Status: Withdrawn

Conditions: Osteoarthritis

Treatments: Device: Total knee arthroplasty with Vanguard CR; Device: Total knee arthroplasty with Vanguard XP

Study type: Interventional

Funder types: Other

Identifiers

NCT02921594

XPvsCR_Fluoroscopi_v.1.0

Details and patient eligibility

About

Primary: The primary objective of this pilot study is to compare the intraarticular kinematics by fluoroscopy of Vanguard XP to that of Vanguard CR.

Secondary: The secondary objective of this pilot study is to compare the standing balance by force plate of patients with the Vanguard XP prosthesis to those who have Vanguard CR prosthesis. Furthermore, we wish to assess isometric quadriceps muscle strength in both groups.

Sex: All

Ages: 18 to 75 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Participant in the XP vs. CR study (inherited traits from study inclusion)
• Overall healthy. Have attended standard physiotherapy after unilateral total knee replacement
• Are able to perform the tasks
• Excellent clinical scores (Oxford Knee Score above 39 at 1 year follow up)

Exclusion criteria

• Knee pain above 20 on a 0-100 visual analogue scale
• Any clinical relevant pain from adjacent joints
• Active Knee flexion below 100
• Signs of implant migration, loosening, and implant mal-alignment

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Single Blind

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0 participants in 2 patient groups

Total knee arthroplasty with Vanguard XP

Active Comparator group

Description:

The new Vanguard XP Total knee arthroplasty system is a further development of the Vanguard TKA. The new Vanguard XP system both cruciate ligaments are preserved.

Treatment:

Device: Total knee arthroplasty with Vanguard XP

Device: Total knee arthroplasty with Vanguard CR

Total knee arthroplasty with Vanguard CR

Active Comparator group

Description:

Total knee arthroplasty system without preservation of the anterior cruciate ligament

Treatment:

Device: Total knee arthroplasty with Vanguard XP

Device: Total knee arthroplasty with Vanguard CR