It has been proven that partial absence of teeth is the most common reason for patients seeking orthopedic dental care. in Uzbekistan, this pathology is from 40 to 75% of cases of treatment in medical institutions of the dental profile and occurs in all age groups of patients. Despite the rapid development of science and technology, the emergence of modern technologies, unfortunately, the level of orthopedic dental care still lags far behind the growing demands of today. According to the data, only 3.3 percent of those treated with orthopedics have high-quality prostheses. Reasonable choice of orthopedic structures is possible only when there is reliable information about the possibilities and risks of predicting its outcome, applying a particular method of treatment based on knowledge of the laws of development of positive and undesirable effects of treatment. The concept of rational treatment is reflected in the regulatory framework of the standardization system in health care. The methodological basis of evidence-based medicine or evidence-based medicine (EBM) is clinical epidemiology. The combination of methods used in this science allows to identify patterns in the development of clinical events, in particular complications, and to predict the outcome of medical intervention with the least statistical error and the highest probability.