It is conventionally performed through a hole drilled into the crown of the affected tooth, namely orthograde root canal therapy.
根管治疗手术通常通过在受影响的牙齿牙冠中钻孔完成,即矫正根管治疗。
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For teeth that cannot be treated with orthograde root canal therapy, or for which it has failed, retrograde root filling, which seals the root canal from the root apex, is a good alternative.