目的了解牙体及根尖周病的发病情况，为临床诊断及治疗提供参考价值。
Objective To study the state of tooth and periapex so as to provide reference for clinical diagnosis and treatment.
根管治疗是现今牙髓病和根尖周病的基本治疗方法。
Root canal therapy is a fundamental method of treating pulpal and periapical diseases nowadays.
根管治疗术是牙髓病和根尖周病的基本治疗方法和最佳选择。
Root canal therapy is the basic and most optimal curing method of pulp diseases and apical diseases.
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