The idea of the diploma thesis in relation to testing the tensile properties of dental floss in dry and wet state, after the process of wear, on the qualitative analysis and the testing of the fineness, strength and intermittent stretching of the fibers on the vibroscope and vibrodine. The subject of this thesis is dental floss. The purpose and purpose of the paper is to describe the dental floss, its historical development, method of use, and method of manufacture, then perform a comprehensive analysis of the properties of a series of dental floss samples, as well as to analyze the fibers used to make the dental floss. The paper is structured into seven content units. After the introductory part, which defines the problem, the subject, purpose and purpose of the work, the chapter presents the basic concepts of floss, historical development, method of use, and the main advantages and disadvantages of its use. The third chapter deals with the methods of making the dental floss itself, its coatings and aromas. Chapter four deals with dental floss samples and test methods. Chapter 5 covers the results obtained and the mapping. After concluding discussion in Chapter Five, the following is a conclusion and a list of the literature used to make this work. The primary source of data was data from the professional and scientific literature, web sources related to this topic, and knowledge acquired during education. In the preparation of the paper, existing data, synthesis and comparison methods are analyzed, and a descriptive analysis method is used to describe the facts.