According to the appointment of a dentist or according to therapeutic indications:

According to the appointment of a dentist or according to therapeutic indications, due to the impossibility of conservative dental treatment, which are caused by:

• significant destruction of the crown part of the tooth without the possibility of using its crown or root for prosthetics;

• obturation of the root canal with a broken endodontic instrument (poor treatment of the tooth canal) if it is impossible to remove it;

• anatomical features (impassability or curvature of root canals);

• as a result of dental treatment that caused perforation of the root or cavity of the tooth, if these violations cannot be eliminated.