The use of fixed dentures in prosthetic treatment requires a thorough analysis of clinical factors such as: the condition of the abutments subject to grinding procedures, the degree of their loosening, the extent of missing teeth, and the condition of the periodontal tissues. An important step in prosthetic treatment is planning subsequent procedures, including the grinding of the crowns of the natural teeth. Often, the initial stages of gingivitis are not visible during a clinical examination [1-4].

Inclusion Criteria:

• appropriate age range of patients, indication for the use of fixed dentures, no signs of gingivitis in the clinical examination

Exclusion Criteria:

• any autoimmune disease or other systemic disease which could alter the course of periodontal disease, the desire to withdraw from participation in the research and the occurrence of general and local diseases

The study material consist of 90 patients, of both sexes, aged between 35-48 years, who report for prosthetic treatment with fixed dentures to the University Dental Clinic at the Institute of Dentistry in Krakow, in the period: March 2023- August 2024.