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应力性骨折是一种过劳性损伤,可发生于异常或反复应力作用于正常骨(疲劳骨折)或正常应力作用于异常薄弱骨(不全骨折)的情况下。
Stress fractures are overuse injuries that occur in the setting of unusual or repeated stress to normal bone (fatigue fracture) or normal stress to abnormally weakened bone (insufficiency fracture).
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应力性骨折最常见的部位是股骨颈、
跖骨
、
跗骨
和胫骨(后内侧或前外侧)。
The most common sites for stress fractures are in the femoral neck, metatarsals, tarsals, and tibia (posterior medial or anterolateral aspect).
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发生机制部分是由于骨
对拉力/张力反应较差,而不是
对压力的反应差。
Mechanism is partly due to poor response of the bone to tensile instead of compressive forces.
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应力性骨折的表现取决于其愈合的不同阶段,早期X线片上往往不可见。
The appearance of a stress fracture depends on the stage of healing and is often not visible on early radiographs.
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MRI和骨扫描比X线片能更早的检测到应力性骨折和应力反应。
MRI and bone scan can help detect stress fractures and stress response earlier than radiographs.
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透亮的骨折线常垂直于骨皮质。
The lucent fracture line is often perpendicular to the cortex.