Title : Comparing measurement techniques for posterior tibial slope
Abstract:
The posterior tibial slope (PTS) is a critical anatomical feature of the tibia that influences knee biomechanics, particularly in relation to anterior cruciate ligament (ACL) injuries and knee osteoarthritis. The measurement is usually taken on short knee lateral radiographs, but it is not certain which is the most accurate and comparable measurement to the full length radiograph.
Background: The posterior tibial slope has been linked to knee stability and function, with variations in its angle affecting the risk of ACL injuries and the development of osteoarthritis. Understanding the measurement techniques and implications of PTS is essential for clinicians and researchers.
Methods: This scoping review synthesizes 4 current papers that include current methodologies for measuring PTS. We screened 774 paper, 32 included for full text review and 4 included for the final analysis. They described radiographic techniques, and variations in measurements in short leg lateral knee radiographs compared to long leg radiographs.
Results: Studies indicate that on average the posterior tibial slope is over-estimated by 3 degrees on short leg radiographs compared to long leg radiographs. There is not enough data to comment on the difference between measurements of posterior tibial slope from anterior or posterior tibial cortex, when comparing to long leg radiographs. This shows an area needed for further research and development in this field.
Conclusion: Accurate assessment of the posterior tibial slope is vital for understanding its role in knee pathology. Further research is recommended to evaluate the most accurate measurement method and its applicability to future orthopaedic procedures including robotic assisted Total Knee Arthroplasty.
