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Significant bone resorption took place at the end of Marine recruit training due to accumulation of weight-bearing exercise throughout training and the increase in marching toward the end.

We describe a novel technique to allow use of small pins in medium pin size clamps. Slipping a second 3 mm pin into the same clamp hole as the first allows the 5 mm clamp to bite securely on a 3 mm pin. This enables construction of an external fixator frame utilising 3 mm and 5 mm pins, as required to span the elbow, wrist and ankle. This extends the capabilities of the 5 mm clamp and reduces the need for extra materiel such as sets containing damps to connect 3 mm pins to standard size rods.

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