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几乎没有牙科医生对无髓牙用桩增力和冠覆盖的基本原理表示怀疑。不少学者对影响根管治疗牙寿命的各种因素都作过研究,但大多数都是体外研究。而对根管治疗后牙折增加的临床研究则很少。从体外研究中提出了与抗牙体折断力有关的几个因素:(1)冠内增力,(2)冠覆盖,(3)牙齿在牙弓中的位置。本研究的目的是用1273例根管治疗牙的体外研究与临床相结合。以决定用桩增力和冠覆盖的临床意义。并根据根管治疗牙在牙弓中的位置,评定是否需作冠内增力和冠覆盖修复。
Almost no dentist doubts the rationale for augmenting and crown-uncoiled piles. Many scholars have studied the various factors affecting the life of root canal treatment of teeth, but most are in vitro studies. However, there are few clinical studies on the increase of dental folds after root canal treatment. Several factors related to anti-tooth fracture force were proposed from in vitro studies: (1) augmentation in the crown, (2) crown coverage, and (3) position of the tooth in the dental arch. The purpose of this study was to combine 1273 root canal treatment of in vitro studies with clinical practice. In order to determine the clinical significance of the pile force and crown coverage. According to the root canal treatment of teeth in the dental arch position, assessment of the need for crown augmentation and crown coverage repair.