## Introduction
While intramedullary nails (like PFNA) have gained popularity, the **Dynamic Hip Screw (DHS)** system remains the gold standard for **stable** intertrochanteric hip fractures. Its ability to allow for controlled compression along the femoral neck is unmatched in simple fracture patterns.
## Controlled Collapse Principle
The DHS system is designed to allow the femoral head and neck segment to slide down the barrel of the plate.
* **Dynamic Compression:** As the patient bears weight, the fracture fragments are pushed together.
* **Primary Healing:** This constant pressure stimulates direct bone healing and increases the stability of the construct over time.
* **Prevention of Cut-out:** By allowing the screw to slide rather than resisting all force rigidly, the risk of the screw “cutting out” through the top of the femoral head is reduced.
## Technical Specifications
* **Plate Angles:** Available in 130掳, 135掳, and 140掳 to match individual patient anatomy.
* **LCP Compatibility:** Modern DHS plates from Ortholyx often feature locking holes in the distal shaft to improve fixation in the femoral shaft.
* **Material:** Available in Titanium and Stainless Steel.
## When to Use DHS vs. IM Nailing
DHS is preferred for:
1. **Stable fracture patterns** (AO Class 31-A1).
2. Patients where surgical cost is a major factor (DHS is more economical than IM nails).
3. Surgeons who prefer an open approach for direct visualization of the fracture reduction.
## Conclusion
The DHS system is a reliable, time-tested solution for hip trauma. Ortholyx continues to innovate this classic system by adding locking technology and high-precision threading.