Sioram
Orthopedic instruments and AFN Nailing System study believes that the proximal third of the tibia with an intact fibula are more prone to develop into varus angulation. This is because, in the case of the proximal third of the tibia, there is poor mechanical leverage in the short fragment of a diaphyseal bone than from the surrounding soft tissues.
Ortho surgical implants R& D team quotes, “If the fracture pattern is oblique, lateral, medial, or proximal to distal, the long distal fragment will provide support to stabilize the short proximal fragment. This will further aid in the prevention of acute varus deformity or severe medial angulation.
A proximal fracture with slight tilting from medial to lateral or proximal to distal is generally not supported by the long distal tibial fragment and thus has a greater tendency to slip into varus deformity with weight-bearing. The most common example that we as an orthopedic instruments expert have seen is in the case of the proximal tibial fractures with an intact fibula.
