结论：10%过氧化脲能有效地治疗变色无髓牙。

Conclusions: The 10% carbamide peroxide can provide an effective way to lighten discolored nonvital tooth.

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结论：甲硝唑片置入阻生齿或无髓牙拔牙窝内可以起到预防干槽症的作用。

Conclusion: Metronidazole Tablets placed into the extraction wound of impacted teeth and pulpless teeth may provide prevention against dry socket.

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治疗中，患者临睡前将10%过氧化脲注入髓室及个别托盘的储药池内，从而同时从内外两侧对无髓牙进行漂白。

The 10% carbamide peroxide was injected into the chamber of the nonvital teeth and the reservoirs of the custom fitted trays. The nonvital teeth were bleached from both the inside and the outside.

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