The tibial crest (shin) is the sharp subcutaneous anterior edge of the tibia running from the tibial tuberosity distally to the ankle, forming the palpable anterior border of the leg. The bone here is covered only by periosteum and skin with no muscular protection, making it vulnerable to direct trauma. The tibial crest is the landmark for tibial nail entry in tibial intramedullary nailing.
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The subcutaneous position of the tibial crest means open tibial fractures at this level have high rates of skin loss and soft tissue complications, requiring plastic surgical coverage. Tibial stress fractures in runners affect the posteromedial cortex most commonly, but anterior cortical stress fractures at the crest (dreaded black line) are at high risk of complete fracture and require intramedullary nailing or extended non-weight-bearing. The tibial crest is the approach for medial tibial intramedullary nailing and for bone biopsy.
Run your fingers down the front of the shin from the tibial tuberosity to the ankle. The sharp ridge you follow, lying just under the skin, is the anterior border (crest) of the tibia; the flat medial surface beside it is also felt directly under the skin.
Repetitive loading in runners and military recruits causes a transverse tension stress fracture at the anterior tibial cortex at the mid-diaphyseal crest level, producing a dreaded black line on radiograph with high non-union and complete fracture risk, managed by intramedullary tibial nailing rather than conservative treatment.
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