牙齿是消化器官的主要组成部分。且有咀嚼、语言、发音及美观等功能。如何保护每颗牙齿,使其能充分发挥其应有的功能,则是口腔医务工作者的应尽职责。在我们的日常工作中,体会到复根牙的发病率是比较高的,但其病灶有的只是限于复根中的一根,而另外的根则是健康的,或是可以治愈的,并且其相应部分的牙冠常是比较完整的。以往对此类病牙的 Teeth are the main components of digestive organs. And chewing, language, pronunciation and aesthetics and other functions. How to protect each tooth, so that it can give full play to its due function, it is the oral medical workers due diligence. In our day-to-day work, I realized that the incidence of complex root teeth is relatively high, but some of its lesions are limited to one of the complex roots, and the other roots are healthy, or can be cured, and The corresponding part of the crown is often more complete. In the past for such sick teeth