According to the Garden classification, which grade of intracapsular neck of femur fracture is characterized by complete fracture with full displacement of the distal fragment?

Explanation

## Garden Classification of Intracapsular NOF Fractures **Key Point:** The Garden classification grades intracapsular neck of femur fractures (I–IV) based on the degree of fracture line propagation and displacement of the distal fragment. Grade IV represents complete fracture with full displacement. ### Garden Grading System | Grade | Fracture Pattern | Displacement | Stability | Prognosis | | --- | --- | --- | --- | --- | | **I** | Incomplete (stress fracture) | No displacement | Stable | Excellent | | **II** | Complete through neck | No displacement (impacted) | Stable | Good | | **III** | Complete through neck | Partial displacement (50%) | Unstable | Fair–Poor | | **IV** | Complete through neck | **Complete displacement (100%)** | **Unstable** | **Poor** | ### Radiographic Features of Grade IV 1. **Fracture line extends completely across the femoral neck.** 2. **Distal fragment is completely displaced** — no contact with proximal fragment. 3. **Loss of trabecular alignment** — femoral head rotates out of alignment with the acetabulum. 4. **High risk of vascular disruption** — MFCA is completely torn. 5. **High risk of avascular necrosis** — reported in 30–50% of cases. **High-Yield:** Grades III and IV are considered **unstable** and have significantly higher rates of non-union and AVN compared to Grades I and II. This classification drives treatment decisions: Grades I–II are often managed conservatively or with internal fixation in situ, while Grades III–IV typically require early surgical intervention (ORIF or arthroplasty). **Clinical Pearl:** Grade IV fractures in elderly patients (>65 years) are often treated with primary hip arthroplasty rather than fixation, because the high AVN risk and poor bone quality make fixation less likely to succeed. **Mnemonic:** **Garden IV = Completely Displaced** — think of the distal fragment being completely "displaced" or "separated" from the proximal fragment with no bony contact.