Whether a loose tooth can be fixed or not is mainly based on the following indicators, firstly, it depends on whether the tooth has the value of retention and whether there is still a certain amount of supporting tissue around the root, secondly, it depends on whether the infection can be completely controlled, no more overflowing pus is not a criterion for complete control of infection, other professional indicators such as the depth of periodontal pockets and gum bleeding should also be referred to, and thirdly, there should be solid teeth around this loose tooth as abutment teeth to fix the loose tooth, in addition to whether the degree of looseness of the tooth affects the chewing function, the alignment of the teeth and the occlusal relationship between the upper and lower teeth are also factors to be considered. So you should also go to the hospital for examination and consider whether it can be fixed based on the examination results. As for how to protect your teeth, my suggestion is to brush your teeth effectively twice in the morning and evening, for more than 3 minutes each time, with each tooth surface brushed, and then it is to have regular oral examination to find out the problem and treat it early.