Non union occurs in the following fractures EXCEPT
**Core Concept**
Nonunion is a complication that arises when a fracture fails to heal, leading to persistent bone gap and potential long-term disability. This condition involves an interplay of various factors including inadequate blood supply, infection, smoking, and certain medications.
**Why the Correct Answer is Right**
Nonunion typically occurs in fractures with poor blood supply, such as scaphoid fractures, fractures of the neck of the femur, and fractures of the tibia with a segmental defect. These fractures have a higher risk of nonunion due to the limited vascular supply, which impairs the delivery of oxygen, nutrients, and growth factors necessary for bone healing.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not provided.
**Option B:** This option is not provided.
**Option C:** This option is not provided.
**Option D:** This option is not provided.
**Clinical Pearl / High-Yield Fact**
It's essential to note that nonunion can be prevented or treated with various modalities, including bone grafting, electrical stimulation, and the use of non-invasive devices that promote bone healing.
**Correct Answer:**
(Note: Please provide the options for a complete explanation)