It extended to the dentino-cemental junction at the root dentin and the dentino-enamal junction at the coronal dentin.在冠部至釉牙本质界 ,在根部达牙本质小管末端。
It extended to the dentino-cemental junction to the root dentin and the dentino-enamal junction at the coronal dentin.在冠部至釉牙本质界 ,在根部达牙本质小管末端。