Research Progress Of Root Canal Retreatment And Case Report

The root canal therapy is the most effective therapy for pulpal and periapical disease. With the development and application of the new technology and new material in recent years, it leads more success of root canal treatment.The rate of success of root canal treatment has increased gradually. But the case of failure occurred occasionally, which lied to various reasons. For example, the complexity and variation of root canal system, the limitations of the medical instruments, the technique level of dentists, etc. It was because of these factors that inflammation of the teeth symptoms persisted, so the teeth could not function and even affect the Prosthodontic treatment.The success of root canal retreatment highly depends on complete removal of previous root filling material and infection tissue, and formation of tight three-dimensional closed. Only in this way can save the teeth. Furthermore, with progress of the modern root canal therapy, various special operative microscope, ultrasonic device, and machine nickel-titaniun rotary instrumentation used in the endodontic retreatment, the successful rate is increased. However, these advanced equipment and devices in clinical practice are not widely used, now we still use the traditional instruments for root canal retreatment in most cases.But if we choose the reasonable treatment, combine appropriate solvent with instruments to remove the original root filling material.at the same time, the caution of clinical operation is also necessary. The good effect can be achieved. The study, which is based on clinical cases of endodontic retreatment, is to analysis the reasons of failure of root canal treatment, to discuss the endodontic retreatment methods and operating key points. We hope the findings and treatment options will be further value in the clinical operations, and also can provide us with the clinical experience.