根管显微镜联合超声技术在塑化根管再疏通中的应用

目的:评价根管显微镜联合超声技术在塑化根管再疏通中的应用。方法:选取曾进行过塑化治疗的患牙77颗,在根管显微镜下,采用超声根管锉、超声工作尖疏通塑化根管上段,再用根管扩大器扩大及EDTA疏通根管下段,机用镍钛器械预备根管,完成根管充填,X线片评价根管再疏通效果。结果:190个塑化根管169个根管疏通成功,再疏通成功率88.9%。治疗过程中无牙根折裂、根管壁侧穿或器械折断发生。结论:根管显微镜联合超声器械去除根管内塑化物快速、有效。

Root canal negotiation of resinified teeth by ultrasonic treatment under dental microscope

Objective: To evaluate the effects of ultrasonic treatment under dental microscope in the root canal negotiation of resinified teeth.Methods: 77 resinified teeth in 77 patients were treated by root canal therapy.The coronal portion of resinified root canals was treated with ultrasonic instruments under dental microscope,and the apical portion was managed with small size hand files and EDTA.The root canals of all cases were shaped by Nickel-Titanium rotary instruments Endo IT.The efficiency of preparation and obturation was analyzed by X-ray before and after treatment.Results: 190 resinified root canals were treated and 169(88.9%) of them were fully negotiated.No complication,such as vertical fracture,ledge,perforation and instrument separation,was found.Conclusion: Ultrasonic instruments under dental microscope is effective in the negotiation of the resinified root canals.