The behavior and the prevention of vertical root fractures by the adhesive root canal filling materials application.

粘附性根管充填材料对垂直根折行为的影响。根端切除和根洞预备减少了牙本质，但不会增加VRF的易感性。通过热循环过程可以观察到断裂线在VRF中的扩展。提示粘附性根管充填材料不能阻止VRF中断裂线的扩展。粘附性根管充填材料的选择对临床选择有重要意义。

The adhesive root canal filling materials influence on the behavior of vertical root fractures (VRFs). The decrease of dentin by the root end resection and cavity preparation did not bring a susceptibility of VRFs. The propagation of fracture line in VRFs could be observed by thermal cycling procedures. It is suggested that the adhesive root canal filling materials did not prevent the propagation of fracture line in VRFs. It is important on clinical option to choice the adhesive root canal filling materials.