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عمومی::
انحراف عمقی تاندون
A, B, Normal moment arm (MA), the intra-annular pulley distance (IAPD) between the A-2 and A-4 pulleys, and the profundus tendon excursion (PTE), which occurs within the intact digital fibroosseous canal as the proximal interphalangeal joint is flexed to 90°.
The moment arm is increased, and a greater profundus tendon excursion is necessary to produce 90° of flexion because of the bowstringing that results from the loss of pulley support.
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