The best way to remove the odor of tooth decay is to go to a professional dentistry and apply the power system of dentistry to remove the decayed part of tooth decay. The reason why tooth decay produces bad odor is because the tooth decay is caused by the decay and disintegration of the hard tissues due to the bacterial infection of the hard tissues of the teeth, and at this time, bacteria have appeared in the teeth, and there are gas-producing pods of bacteria. This kind of bacteria will produce odorous gas, which will form the odor of tooth decay. The best way is to apply the high-speed turbine handpiece of dentistry to remove the decayed part of tooth decay completely, and then apply the dental filling material to fill the cavity well, which is the best way to cure tooth decay and remove the odor.