Root resorption is usually considered for extraction if it exceeds 2/3 of the root length, and preservation treatment is recommended if the resorption does not exceed 1/3.
There are many reasons for root resorption, which is commonly caused by other physical and chemical factors such as trauma to the tooth, inflammation of the root tip that is not treated in time, and other symptoms such as loosening and pain of the tooth.
If the root resorption is more than 2/3, there is serious tooth loosening, pain, at this time the tooth has no value of retention, it is recommended to extract.
Root resorption is not more than 1/3 of the root length, or root resorption is more than 1/3 but not up to 1/2, there is no looseness of the tooth, no clinical symptoms, the tooth can be retained. For root resorption caused by apical inflammation, the looseness is not too big, you can also carry out endodontic treatment and apical surgery to retain the affected tooth.
Whether root resorption is to be extracted or treated requires prompt medical attention, examination under the guidance of a physician, and the development of a comprehensive medical program.