Patient: In March last year, a piece of the upper left canal was choked off by sand, and now the middle defect has become bigger, this week, I went to the Third Hospital of North Medicine and was diagnosed with pulpitis, and had two root canal treatments on Monday and Thursday. The doctor said that because of the complex root canal situation, it is easy to break the instrument, the three hospitals do not have the conditions to remove the instrument, it is recommended to go to the oral hospital. In addition, he said that if I continue to be treated in the hospital, I can only seal the root canal, which will easily cause inflammation in the future. I have no discomfort after two treatments I am 32 years old, if the root canal has not been open do you think you can continue the root canal treatment? I recommend taking a CT film of the tooth to clarify the calcification of the root canal, the site of calcification and whether there is inflammation at the root tip. If there is no inflammation and the root canal is completely calcified, it does not necessarily need to be opened, if the root is blindly opened instead, there will be complications such as root canal lateral penetration and instrument fracture. If there is inflammation at the root tip, it is usually partially calcified and the CT will alert the doctor to the location of the calcification. The doctor can use a microscope, an ultrasound working instrument and some other special equipment to unblock the root canal and then perform root canal treatment.