Primary root resorption is a physiological event for the primary teeth and plays an important role during normal replacement procedure.

乳牙根吸收是一种生理现象，在乳牙的正常替换过程中具有重要意义。

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Fearing for her health, Conger decided to empty her savings and travel to England for the disc replacement procedure.

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One patient who was preparing for a heart valve replacement seemed slightly calmer after her surgeon showed her an intraoperative video of the procedure.

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