What is the importance of Tip Apex Distance in Dynamic Hip Screw Fixation?

Question:

Why is the Tip Apex Distance critical in dynamic hip screw fixation?

Answer:

The Tip Apex Distance is crucial in dynamic hip screw fixation because it determines the stability of the fixation and predicts the risk of fixation failure.

The Tip Apex Distance in dynamic hip screw fixation is a key measurement that plays a vital role in the success of the surgical procedure. This distance refers to the measurement from the tip of the lag screw to the apex of the femoral head. It serves as a predictor of the surgical outcome and helps orthopedic surgeons make informed decisions during the procedure.

When the Tip Apex Distance is optimal (usually less than or equal to 25mm), it indicates a higher likelihood of successful fixation. On the other hand, a larger Tip Apex Distance increases the risk of fixation failure, leading to potential complications post-surgery.

Orthopedic surgeons use the Tip Apex Distance as a guide to achieve proper positioning and alignment of the lag screw in relation to the femoral head. By maintaining an appropriate distance, they can reduce the chances of screw cut-out, where the screw exits the bone at the femoral head.

Overall, the Tip Apex Distance is a critical factor in dynamic hip screw fixation that influences the stability of the fixation and impacts the overall success of the surgical procedure.