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在牙体治疗过程中,根分叉穿孔会造成很多问题,牙周膜附着丧失,上皮增生,骨不断吸收,最终导致牙齿丧失,影响治疗。底穿的治疗目的是封闭牙本质的缺损,并且获得新的牙周膜附着再生。作者选择70颗无龋且牙根发育还不完好而拔下的牙,实验组60颗牙,人为制造髓室底穿孔,所有穿孔处用锻石膏作屏障,又随机分为4组。第一组穿孔处不酸蚀,只用光固化玻璃离子粘固粉(GIC)封闭;第二组把穿孔处牙本质制备出
In the process of dental treatment, the root bifurcation perforation can cause many problems, the loss of periodontal ligament attachment, epithelial hyperplasia, bone absorption, eventually resulting in loss of teeth, affecting the treatment. The purpose of treatment is to close the wear dentin defects, and get a new periodontal membrane attachment and regeneration. The author selected 70 caries-free teeth and tooth root was not yet pulled out of the tooth, the experimental group of 60 teeth, artificially create the perforation of the pulp chamber, all perforation with gypsum as a barrier, were randomly divided into 4 groups. The first set of perforations is not etched, only with light-cured glass ionomer cement (GIC) closed; the second set of perforated dentin prepared