Metaphyseal comminution

Full Definition

Metaphyseal comminution refers to fragmentation of bone fractures occurring in the metaphyseal region, which is the area of long bones between the diaphysis (shaft) and epiphysis (joint end). This region is characterized by transitional bone architecture from cortical to cancellous bone, making it susceptible to complex fracture patterns. Metaphyseal comminution is commonly seen in distal radius fractures, proximal femur fractures, and tibial plateau injuries, often requiring specialized fixation techniques due to the poor bone quality and complex geometry.

Usage

Usage note: Often requires bone grafting or augmentation due to bone loss.

In Context

• "Significant metaphyseal comminution was noted in this distal radius fracture, requiring bone grafting." — Operative report
• "The metaphyseal comminution complicated the reduction and fixation of the proximal tibia fracture." — Surgical note