cancellous impaction
Compression of spongy bone trabeculae due to traumatic force, commonly seen in metaphyseal regions.
Full Definition
Cancellous impaction refers to the compressive failure of trabecular bone architecture within the metaphyseal or epiphyseal regions of long bones. This injury pattern occurs when traumatic forces exceed the structural capacity of the spongy bone, causing collapse and compression of the trabecular network. Cancellous impaction is commonly seen in elderly patients with osteoporotic bone and in high-energy trauma affecting metaphyseal regions. The impacted bone may require elevation, bone grafting, or specialized fixation techniques to restore structural integrity and prevent progressive collapse. Recognition of cancellous impaction is important for appropriate treatment planning and preventing late complications.
Usage
Usage note: Specific to trabecular bone compression; distinguish from general bone crushing injuries.
In Context
- "Significant cancellous impaction in the proximal tibia required bone grafting for structural support." — Operative report
- "MRI revealed extensive cancellous impaction consistent with insufficiency fracture." — Radiology report