The following fractures are known for Non-union except:
**Core Concept**
Non-union of fractures refers to the failure of the bone to heal, resulting in a persistent fracture gap. This can occur due to various factors such as inadequate blood supply, infection, or poor alignment of the fracture fragments. Understanding the specific fractures prone to non-union is crucial for optimal management and treatment.
**Why the Correct Answer is Right**
The correct answer is known for having a high risk of non-union due to its anatomical characteristics and blood supply. The **supracondylar fracture of the humerus** is one such fracture that is known for its high risk of non-union, particularly in the case of posterior displacement. This is because the posterior aspect of the humerus has a relatively poor blood supply, which can lead to impaired fracture healing.
**Why Each Wrong Option is Incorrect**
**Option A:** The **scaphoid fracture** is actually one of the most common fractures that lead to non-union, particularly in the proximal pole. The limited blood supply to this area makes it prone to healing issues.
**Option B:** The **femoral neck fracture** is another fracture that is at high risk of non-union, especially in older adults with osteoporosis. The femoral neck has a relatively poor blood supply, which can compromise fracture healing.
**Option C:** The **supracondylar fracture of the humerus** is the correct answer, as mentioned earlier. This fracture has a high risk of non-union due to its anatomical characteristics and poor blood supply.
**Clinical Pearl / High-Yield Fact**
It's essential to note that non-union can often be prevented with prompt and proper treatment, including immobilization and adequate blood supply. Early recognition of non-union is crucial for initiating appropriate management and preventing further complications.
**Correct Answer:** C. Supracondylar fracture of the humerus is known for non-union except.