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1. Resting Phase-A bone surface is covered by a protective layer of bone cells - called lining cells.

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2. Resorption-During resorption, osteoclasts invade the bone surface and erode it, dissolving the mineral and the matrix.

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3. Resorption Complete-A small cavity is created in the bone surface - resorption is complete.

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4. Formation Repair-Bone forming cells called osteoblasts begin to fill in the cavity with new bone.

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5. Repair Complete-Finally, the bone surface is completely restored.