Apart from local lesions, the presence of dental plaque may also have an effect on health, especially in people with general diseases. The aim of this project was to assess the oral hygiene of patients prosthetically treated at the Dental Prosthetics Clinic of the University Dental Clinic in Krakow (Poland) using fixed and removable dentures and to determine the demographic relationships and data related to the education of the respondents. The research material consisted of 120 patients who used fixed (group I) and removable (group II) restorations. Basic dental examinations and oral hygiene examinations were carried out with the use of the API (Approximal Plaque Index) and PI (Plaque Index) plaque indices. This study presents the percentage of respondents in terms of sex, place of residence, and education. The mean PI (Plaque Index) values were 46.73% (Group I) and 50.05% (Group II). (p = 0.4839). The mean values of API (Approximal Plaque Index) amounted to 65.14% (Group I) and 68.94% (Group II) (p = 0.4695). Patients using dentures showed insufficient oral hygiene, and the hygiene status of patients did not depend on the type of dentures used. The group that is most often treated with prosthetics is women with secondary education. The most numerous group of patients at the Dental Prosthetics Clinic are people living in large cities which results from easier access to health care.

The preparation of model teeth for prosthetic crowns plays a crucial role in preclinical dental education. Its primary objective is to ensure optimal conditions for training students to function in clinical settings. The aim of the study was to assess the quality of dental students' education regarding the preparation of model teeth for cast metal-ceramic crowns. An additional objective was to compare the agreement between measurements made by examiners on the model teeth prepared by the students. A total of 180 model premolar teeth (KaVo) were used for the tests. The teeth were prepared by the third-year dental students, who created a shoulder finish line on the buccal surface and a chamfer finish line on the palatal surface. Two examiners assessed the convergence angles of walls, the margin width of surfaces, the reduction in the height of functional and non-functional cusps, the extent of the preparation, the smoothness of the preparation, and the continuity of the finish line using simple measuring tools. The students' most proficient parameters were margin width, the extent of the preparation, and the finish line continuity. The least accurate results were observed in the wall convergence angles and the reduction in the height of functional and non-functional cusps. The interexaminer reliability was considerable for convergence angles, the margin width and the reduction in the height of cusps (intraclass correlation coefficient (ICC) >0.75). The examiners demonstrated moderate agreement (kappa: 0.60-0.79) for parameters such as the extent of the preparation, wall smoothness and finish line continuity. The exercises provided a solid foundation for the students. However, practice and more targeted feedback are necessary to improve performance in the more challenging aspects of tooth preparation. The traditional analytical approach that uses simple measuring tools to assess the tooth preparation procedure is a reproducible method that examiners can use to effectively evaluate students' work.

Background: The post and core procedure is used to reconstruct the tooth stroma. Mold posts reflect the configuration of the prepared canal. There are aspects that determine the strength of the tooth restored with a post. Aim: The aim of this work was to optimize the length of the root part...