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Updated: May 25, 2026

Using a Knee Arthrometer to Evaluate Tissue-specific Contributions to Knee Flexion Contracture in the Rat
Published on: November 9, 2018
Treatment of severe flexion deficits following total knee arthroplasty: a randomized clinical trial
1University Physical Therapy, Decatur, GA, USA.
Purpose:
To determine whether passive knee flexion and knee-specific outcome scores differ in TKA patients experiencing arthrofibrosis treated with differing intensity of stretch exercises.
Design:
Randomized Controlled Trial
Sample:
Twenty patients who volunteered and met inclusion criteria were randomly assigned to an intervention group.
Treatment:
Group 1 received high-intensity stretch home mechanical therapy (n = 11) and Group 2 received low-intensity stretch home mechanical therapy (n = 9).
Findings:
The HIS group demonstrated significantly greater gains in both passive knee flexion and outcome scores. The change in passive knee flexion significantly correlated with the change in outcome scores, and a significantly greater number of patients in the HIS group (91%) were able to achieve a functional range of motion >110° than those in the LIS group (22%, p < .001).
Conclusion:
Treatment of postoperative arthrofibrosis with an HIS home mechanical therapy device was more effective and resulted in significantly improved outcomes when compared with LIS devices.