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

结论：10%过氧化脲能有效地治疗变色无髓牙。

youdao

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

结论：10%过氧化脲能有效地治疗变色无髓牙。

youdao