The metaphysis is the part of a long bone located between the epiphysis (end of the bone) and the diaphysis (shaft of the bone). Think of it as the flared portion of the bone connecting the shaft to the end. It's a crucial area for bone growth and development.
Key Features of the Metaphysis:
- Growth Plate Location: The metaphysis houses the growth plate (physis), responsible for longitudinal bone growth during childhood and adolescence. As the child grows, this growth plate ossifies (turns into bone), gradually merging with the diaphysis and epiphysis. [Source: Wikipedia, ScienceDirect, Radiopaedia]
- Bone Remodeling: Significant bone remodeling occurs in the metaphysis, particularly after fractures. This involves the formation of new bone tissue, crucial for healing and maintaining bone structure. [Source: ScienceDirect]
- Fracture Site: Metaphyseal fractures are common, especially in children, due to the metaphysis' relatively weaker structure compared to the diaphysis. The proximity of the growth plate to the metaphysis influences fracture healing and the potential for growth disturbances. [Source: Radiopaedia, RCH Clinical Practice Guidelines]
- Bone Shape Influence: The metaphysis contributes significantly to the overall shape and structure of long bones. [Source: Radiopaedia]
- Clinical Significance: Various conditions, such as Schmid metaphyseal chondrodysplasia, affect the metaphysis, leading to impaired bone development and growth abnormalities. These abnormalities may manifest as bowed legs or short stature. [Source: GeneReviews, NCBI]
Understanding Metaphyseal Fractures:
Metaphyseal fractures involve the metaphysis of long bones. In children, these fractures often have good remodeling potential due to their location near the growth plate. However, the potential impact on growth needs careful assessment and management. [Source: RCH Clinical Practice Guidelines, Radiopaedia]
Metaphyseal Terminology:
- Metaphyses: The plural form of metaphysis.
- Metaphyseal spurs: Bony outgrowths extending from the metaphysis. [Source: NCBI]
- Metaphyseal irregularity: Abnormal shape or structure of the metaphysis often associated with underlying conditions. [Source: NCBI]
