Fig. 5
From: Bent or broken: analysis of set screw fracture in the TFNa implant
Pictured from left to right are the set screws for the Gamma 3, Intertan, TFNa, and TFN cephalomedullary nails. The set screws for the TFNa and TFN are unique as they have two separate pieces. The components are divided into the upper portion, or lock drive, and the lower portion, or lock prong. The lock prong in the TFNa appears smaller and thinner in size than its predecessor, the TFN. A spring has also been added in the TFNa