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前牙冠部缺失后,经过完善的根管治疗,常用铸造桩核或简单桩钉来进行桩冠修复。但由于各种原因,使桩核或桩钉脱落再重新在根管内粘固,粘固前又需要除去腐质和根管内壁的水门汀,这样根管内被扩大了,影响粘固效果,经这样反复几次,使根管壁变薄,形成喇叭状。这时如果再用铸造桩核修复,由于管壁变得非常薄,桩核又非常粗壮,使根管的抗力能力变小,很容易造成根折断或根纵劈。如果用简单桩钉来修复,细小的钉怎能与偌大的喇叭状根管密贴呢?只靠水门汀粘固是不能得到良好的固位的,时间不长又会脱落,如此循环这颗牙根不能保留只得拔除。为了解决上述情况,我们使用树脂桩核来修复此类前牙。
After the loss of the anterior crown, after a sound root canal treatment, commonly used cast post or simple post pile nail crown repair. However, due to various reasons, the pile core or pile pegs off and then re-cementing in the root canal, before cementing need to remove the humus and root canal inner wall of the cement, so that the root canal has been expanded, affecting the cementing effect, After repeated several times so that the root canal thinning, the formation of trumpet-shaped. At this moment, if the cast post and core are rebuilt again, because the wall of the tube becomes very thin and the post core is very thick, the resistance ability of the root canal becomes smaller and the root breakage or root longitudinal split can easily be caused. If the simple pile nail to repair, how can a small nail with a large trumpet-shaped root canal close it? Only by cement cementing can not get a good retention, the time is not long will fall off, so cycle the root Can not be retained only to be removed. In order to solve the above situation, we use resin post to repair such anterior teeth.