Video – Dial Test

Videos to help you sharpen your examination skills.
Educators are welcome to play these videos in class directly from this website.
Copyright © All rights reserved. Examination Videos ™ and Educom Continuing Education™

Select Exam Videos by Region

Select Exam Videos by Title

Dial Test

The Dial test is used to detect the presence of posterior cruciate ligament insufficiency or posterolateral rotary instability or both. This test is also called the tibial external rotation test and the tibial lateral rotation test. With the patient in the prone position, flex the knees to 30 degrees, externally rotate the legs and observe the extent of external rotation by comparing the two limbs. Now flex the knees to 90 degrees, repeat the external rotation and observe the extent of external rotation by comparing the two limbs. If there is an increase in external rotation at 30 degrees of flexion and not at 90, damage to the structures of the posterolateral corner of the knee is implicated. If there is an increase in external rotation at 90 degrees of flexion and not at 30, the posterior cruciate ligament is suspect. If external rotation is greater in both 30 and 90 degrees of knee flexion, both the posterolateral corner and the posterior cruciate ligament are implicated.

The posterolateral corner structures include the following:

  • Arcuate-popliteus complex
  • Lateral collateral ligament
  • Biceps femoris tendon
  • Posterolateral capsule
  • Iliotibial band

Produced by Educom Continuing Education™. All rights reserved. Copyright © Educom Pty Ltd.

Disclaimer:  The ExaminationVideos™ website (including the text, graphics, and videos that appear on it) is designed to offer users general health information for educational purposes only. The information furnished on this website and its online videos are not intended to replace personal consultation with a qualified healthcare provider. You must always seek the advice of a qualified healthcare provider for questions related to your disease, disease symptoms, and appropriate therapeutic treatments.

Copyright © Educom Pty Ltd: All material on this website (including the text, graphics, videos, and downloadable files) are owned by or licensed to Educom Pty Ltd and is subject to copyright and other intellectual property rights under international conventions.