Editorial Commentary: Posterior Tibial Slope: The “Unknown Size” of the Knee Joint

The posterior tibial slope (PTS) plays an immensely important role in almost every orthopaedic operation on the knee joint. PTS is a decisive factor reconstruction of torn anterior or cruciate ligament, high osteotomy and, course, total arthroplasty. It therefore all more surprising that current clinical practice relatively little emphasis placed exact measurement PTS. If true value not known, influence same pure coincidence. In coronal plane, it clinically valid to determine hip–knee–ankle angle and thus be able mechanical anatomical axes at tibia femur. sagittal however, in-depth analysis often dispensed with only short lateral radiograph used. Different are described addition, overlooked determination radiographs can represent average, since medial plateau shows considerable differences purely anatomically. future, we should place plane joint including least as profound frontal plane. Here, entire must requested axis