"国内采取保守牙髓治疗，就是杀部分神经的做法，如果没有病变到牙根，就是采取这种治疗方法。" this kind of therapy is just suitable for the yong children, esp for the children whose tooth root is not totally formed. To keep the lower part of the nerve is to simulate the formation of the root. If your dental pulp has already got the inflamation, this therapy is not thorough, after a period of time, you could still get the inflamation, at that time you will still need to get the RCT. But some times, you could suffer from the new restoration, sometime it might passaway by itself after a period of time. in you case, strongly recomend you to do the RCT