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目的:总结根管阻塞的主要原因及影响阻塞根管疏通的主要因素。方法:收集病例89例,共107个根管阻塞,在显微镜下使用超声器械和小号手用器械进行根管疏通。记录根管阻塞的情况和效果。结果:根管阻塞的原因主要有根管治疗史及钙化等。磨牙的根管较前牙及前磨牙易发生阻塞,且疏通成功率较低。因牙胶充填、塑化、钙化和其他原因导致的根管阻塞疏通的成功率依次为85%、52.8%、69.7%和55.6%。在X线片上有根管影像的阻塞根管疏通成功率(75.3%)高于无根管影像者(47.6%)(P<0.05)。根管上段阻塞的疏通成功率明显高于根管下段阻塞者(P<0.05)。结论:塑化和钙化是较常见的导致根管阻塞的主要因素,塑化根管阻塞的再通成功率不高,根管阻塞的位置和牙位影响疏通成功率。
OBJECTIVE: To summarize the main causes of root canal blockage and the main factors affecting the unblocking of root canal. Methods: 89 cases were collected, a total of 107 root canal obstruction, the use of ultrasound equipment and trumpet instruments under the microscope for root canal dredge. Record the situation and effect of root canal blockage. Results: The causes of root canal obstruction mainly include the history of root canal therapy and calcification. Molar canals than the pre-molar and premolar prone to blockage, and to clear the success rate is low. Success rates of root canal obstruction due to teetal filling, plasticization, calcification and other causes were 85%, 52.8%, 69.7% and 55.6%, respectively. The success rate of obstruction root canal imaging with root canal imaging on X-ray film was higher than that without root canal imaging (75.3% vs 47.6%, P <0.05). The successful rate of root canal blockage was significantly higher than that of the lower root canal blockage (P <0.05). Conclusion: Plasticization and calcification are the most common causes of root canal obstruction. The success rate of reopening of plastic root canal obstruction is not high. The position of root canal obstruction and tooth position influence the successful rate of root canal obstruction.