1. Possible errors in orthopedic treatment of patients with complete absence of teeth during repeated prosthetics in senile and elderly patients, with a decrease in the height of the lower face and methods for their elimination.

  2. Complications when using lamellar prostheses in senile and elderly patients. Methods of prevention and elimination.

3. Possible errors in determining and fixing the central ratio of the jaws in senile and elderly patients, the mechanism of origin and methods for their elimination.

4. Analysis of medical errors in determining the central ratio of the jaws in elderly patients - causes, consequences, remedies.