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Updated: Jun 5, 2026

A Mini-Invasive Internal Fixation Technique for Studying Immobilization-Induced Knee Flexion Contracture in Rats

A Mini-Invasive Internal Fixation Technique for Studying Immobilization-Induced Knee Flexion Contracture in Rats

Published on: May 20, 2019

A less invasive procedure for posttraumatic knee stiffness.

Ke-Min Liu¹, Sihai Liu, Zhigang Cui

¹Department of Orthopedics and Rehabilitation, Beijing Charity Hospital, Feng Tai District, Jiao Men Bei Road #10, Beijing 100068, People's Republic of China. keminlqliu@sina.com

Archives of Orthopaedic and Trauma Surgery

|December 18, 2010

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This study presents a less invasive surgical procedure for posttraumatic knee stiffness (PTKS). The technique significantly improved knee range of motion and patient satisfaction, offering a viable solution for challenging rehabilitation cases.

Area of Science:

Orthopedic Surgery
Rehabilitation Medicine

Background:

Posttraumatic knee stiffness (PTKS) presents significant challenges in postoperative rehabilitation.
Effective management strategies for PTKS are crucial for patient recovery and function.

Purpose of the Study:

To evaluate the outcomes of a novel, less invasive surgical procedure for PTKS.
To assess the efficacy of arthroscopic release, mini-incision extra-articular release, and extensor mechanism lengthening combined with early aggressive rehabilitation.

Main Methods:

Retrospective study of patients aged 29-60 undergoing the procedure between April 2005 and May 2009.
Procedure involved intra-articular arthroscopic release, extra-articular mini-incision release, and "multiple Z" lengthening of the knee extensor.
Patients followed an early and aggressive rehabilitation protocol post-surgery.

Related Experiment Videos

Last Updated: Jun 5, 2026

A Mini-Invasive Internal Fixation Technique for Studying Immobilization-Induced Knee Flexion Contracture in Rats

A Mini-Invasive Internal Fixation Technique for Studying Immobilization-Induced Knee Flexion Contracture in Rats

Published on: May 20, 2019

Main Results:

Significant improvements in knee range of motion were observed in all patients.
Mean flexion improved from 51° preoperatively to 100° at discharge.
Mean extension loss improved from 10° to 3°, with statistically significant p-values (p < 0.000).
Hospital for Special Surgery knee scores improved from 62 preoperatively to 77 at discharge and 91 at final follow-up (p < 0.000).
All patients reported satisfaction with the achieved range of motion gains.

Conclusions:

The described less invasive surgical technique combined with aggressive rehabilitation effectively treats posttraumatic knee stiffness.
The procedure leads to substantial improvements in knee range of motion and functional scores.
High patient satisfaction underscores the clinical effectiveness of this treatment approach.