About the articular line

About the articular line

The premise of reconstructing joint stability and motion characteristics is to restore the articular line to the normal anatomical position. Studies have shown that if the PCL (posterior cruciate ligament) is retained, the articular line must be within 3 mm of its original anatomical position after operation, so as to obtain the maximum joint stability and kinematic characteristics. If the PCL (posterior cruciate ligament) non-retaining prosthesis is selected, the ideal effect can be achieved as long as the articular line is kept within the normal range of 8 mm. The position of articular line can be adjusted by choosing the different sizes of femoral condylar and different thickness of tibial bearing. In revision TKA, the articular line can be further adjusted by combining the thickness of structural bone graft and prosthesis metal augments.

Indicators for determining the position of the articular line of knee joint anatomy include old meniscus scars, probably the position of a transverse finger above the head of the fibula or a transverse finger at the inferior pole of the patella. Through in-depth study, many data pointed out that the knee joint line should be 3.08 cm below the medial femoral epicondyle and 2.53 cm below the external epicondyle.

Just RSK PS high flexion hybrid total knee system provides condylar line reference instruments to clearly identify and determine whether the articular line is within the normal range, so as to better realize the reconstruction of articular line, restore the normal movement function after surgery, and greatly reduce wear and tear.