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根管治疗后牙齿发生劈裂是一个严重的问题。劈裂牙难以补救大都拔除。牙齿发生劈裂的有关因素、国内外刊物上尚未见系统报道。本文以力学及牙体生理学观点,讨论了引起充填后牙齿劈裂的有关因素;补充和修正教科书上关于制备抗力型窝洞的一些观点;强调充填后调合问题。根管治疗后,牙齿硬组织失去了牙髓的营养来源,脆性增强,保护性疼痛反应消失、修复性与继发性牙本质形成功能丧失、防御功能降低,这是无髓牙充填后容易劈裂的内在因素。避免其劈裂的关键,
Teeth splitting after root canal treatment is a serious problem. Split tooth is difficult to remedy most of the removal. Dental splitting related factors, domestic and foreign publications have not yet been systematically reported. In this paper, mechanics and tooth physiology point of view, to discuss the factors that cause the tooth split after filling; to supplement and amend some of the textbooks on the preparation of resistance-type cavities point of view; After root canal treatment, the dental hard tissue loses the nutritional source of dental pulp, enhances the brittleness, disappears the protective pain response, the loss of repair and secondary dentin formation, and the decrease of defensive function, which is easy to split after no tooth filling Internal factors of cleftness. Avoid the key to its cleavage,