Among the exhibits at Crossrail's visitor information centre in St Giles High Street are medieval human bones found at Liverpool Street, a rare amber find and a piece of mammoth jaw bone.

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It was a trauma in the jaw bone of one of the skulls which could have only been made with a sharp instrument and led to the first conclusion that the victims did not die naturally.

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These drugs also can cause joint pain, and in rare cases a buildup of bone in the jaw.

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Also friction from eating and other jaw movement can cause the bone around the implant to wear away.

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