Regarding the management and complications of distal radius fractures (Colles and Smith types), all of the following statements are true EXCEPT:

Explanation

## Management of Distal Radius Fractures: Colles vs Smith **Key Point:** The management strategy for distal radius fractures depends on fracture type, patient age, bone quality, and displacement. Smith fractures, despite being less common, often require operative intervention due to their inherent instability. ### Treatment Algorithms by Fracture Type and Patient Profile ```mermaid flowchart TD A[Distal Radius Fracture]:::outcome --> B{Fracture Type?}:::decision B -->|Colles| C{Patient Age & Displacement?}:::decision B -->|Smith| D{Stability & Displacement?}:::decision C -->|Elderly, minimal displacement| E[Conservative: Cast 6 weeks]:::action C -->|Young, significant displacement| F[ORIF: Volar or dorsal plate]:::action D -->|Minimal displacement, stable| G[Conservative: Cast immobilization]:::action D -->|Significant displacement/unstable| H[ORIF: Volar plate preferred]:::action E --> I[Monitor for malunion]:::outcome F --> J[Good functional outcome]:::outcome H --> K[Restore anatomy, prevent complications]:::outcome ``` ### Comparative Management Table | Feature | Colles Fracture | Smith Fracture | | --- | --- | --- | | **Mechanism** | Fall on extended wrist (FOOSH) | Fall on flexed wrist; direct dorsal blow | | **Displacement** | Dorsal | Volar | | **Stability** | Often stable after reduction | Inherently unstable | | **Conservative Rx** | Acceptable in elderly, minimal displacement | **Frequently fails** due to instability | | **Operative Rx** | Reserved for young patients with displacement | **Often required** even with modest displacement | | **Preferred plate** | Dorsal or volar (dorsal for dorsal comminution) | **Volar plate** (restores volar tilt) | **High-Yield:** Smith fractures are **inherently unstable** and frequently require operative fixation, even in elderly patients. Conservative management alone often results in malunion and poor functional outcomes. This is a critical distinction from Colles fractures, where conservative management is acceptable in many elderly patients. **Warning:** The statement "Smith fractures are best managed conservatively with cast immobilization in all cases" is **FALSE**. This is the trap answer. Smith fractures typically require ORIF, especially if there is significant displacement or volar comminution. ### Complications of Malunion **Clinical Pearl:** Malunion with loss of radial height and dorsal angulation can lead to: - **Late rupture of extensor pollicis longus (EPL)** — the tendon is attenuated over the malunited fracture site - Reduced grip strength - Loss of pronation/supination - Arthritis of the radiocarpal joint - Posterior interosseous nerve (PIN) injury — a recognized complication of distal radius fractures and dorsal surgical approaches (e.g., dorsal Thompson approach) **Mnemonic:** **"Smith = Surgery"** — Smith fractures are unstable and often require operative intervention, unlike Colles, which can be managed conservatively in many cases.