BACKGROUND:The morphology of the retention tooth often does not correspond with the required design; hence there is often an indication for enamel recontouring or other restorative procedures.AIM:The study aimed to determine the impact of changing the path of insertion of the prosthesis by reshaping the anatomical and morphological structures of the natural teeth predetermined for the retention of the prosthesis.MATERIAL AND METHODS:The group of 40 patients with Class II, Subclass 1 according to Kennedy was formed, and 120 approximal surfaces of retention teeth were obtained. Two different types of prostheses were made on the models: one group in the zero point position of the model, and another group in the zero position of the model, with changing of the direction of input at an angle of 2°.RESULTS:The difference between the established and theoretical normal distribution of frequencies was tested with the Kolmogorov-Smirnov and Lilliefors tests (r < 0.10; r < 0.01). The first group showed a retention force of 0.08 N. In the second group the retention force was 0.94 N.CONCLUSION:It could be concluded that the change in the path of insertion of the dental prosthesis with conservative restorations as composite inlays, as well as the accurate extension of the prosthesis onto guiding plane surfaces, will undoubtedly increase the retention force of the prosthesis.

As a digital technology enters in every area of everyday life, including the medicine, it begins to increase its influence in dental practice too. The term scanner in dentistry is called a 3-D scanner and refers to an instrument that collects data on the three-dimensional spatial layout and the shape of the tooth and dental structures in the mouth or the model and transforms them into a set of digital data. With the help of the scanner, the anatomic-morphological structures of the oral cavity are recorded or reflected and data are received in digital form.The first stage in the three-part CAD / CAM process of making a prosthetic device-scanning of the anatomic-morphological structures in this process presents the main basis of the future dental restoration. The scanning, as well as the remaining two parts of the CAD / CAM system are taken from the mechanical engineering sciences that incorporate dental doctrines for the production of a prosthetic devices. The dentists who want to use this technology often do not have enough time or sufficient knowledge to understand the current scanning process. The term scanner in dentistry is called a 3-D scanner and refers to an instrument that collects data on the three-dimensional spatial layout and the shape of the tooth and dental structures in the mouth or the model and transforms them into a set of digital data. With the help of the scanner, the anatomic and morphological structures of the oral cavity are recorded or reflected and data are received in digital form. For these reasons, we feel the need to demonstrate the development of the dental scanning process and its methodological procedures to obtain a virtual model. This makes it possible to obtain a complete picture of digital technology and to understand the necessary information about the scanning process that is today in everyday use. The paper presents the basic data that are currently available with the remark that this technology has a rapid development that will contribute to even better results in the manufacture of prosthetic devices.