National Physical Therapy Examination (NPTE) Practice Exam

Which joint mobilization technique can help achieve the last 10 degrees of knee extension post-total knee replacement?

1. An anterior glide of the tibia on the femur

2. An inferior glide of the patella

3. A medial glide of the patella

4. A posterior glide of the tibia on the femur

The correct answer is: An anterior glide of the tibia on the femur

The technique that helps achieve the last 10 degrees of knee extension post-total knee replacement is the anterior glide of the tibia on the femur. In this context, knee extension is facilitated by the movement of the tibia moving forward relative to the femur. After a total knee replacement, it is common for patients to have difficulty fully extending the knee, particularly due to tightness or restrictions from surgical trauma and scarring. The anterior glide technique directly addresses these limitations by improving the joint mechanics involved in extension. Mobilizing the tibia anteriorly promotes better alignment and function of the knee joint, allowing for increased range of motion. This technique also helps in restoring normal kinematics for activities like walking, where full extension is necessary for an effective gait pattern. Understanding the mechanics of the knee joint is crucial, as the tibia needs to glide anteriorly to allow for full extension, overcoming the inherent limitations that may arise post-surgery.