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EN
Purpose: The purpose of this paper is to analyse attempts at improving the bond between acrylic artificial teeth and the denture base plate - considered in the context of single incisors in framework denture. Design/methodology/approach: It is a review article focusing on the analysis of state of the art in the field of the bond between the polymerised acrylic (teeth) and the polymerising acrylic resin during the production of denture (denture plate). Previous works regard the issue of individual incisor teeth (both upper and lower) breaking off from the metal partial denture. Findings: The bond between artificial acrylic teeth and the acrylic denture plate of the prosthesis was discussed. Ways of improving this bond were also presented. Although researchers and companies offer many methods for improving this bond, none of them refer directly to the issue discussed in this article. In conclusion- the hitherto scientific achievements work well in the case of acrylic prostheses without a metal frame, which constitutes an obstacle for achieving the effect required. In this work, it is suggested that further research would not only develop and provide more detail on the issue of the bond between artificial teeth and the denture plate, but also solve the problem appearing in cases of metal partial denture. Originality/value: This article shows a significant problem that hasn’t been discussed in detail in the past.
PL
Przedstawiono wybrane wyniki badań tribologicznych kompozytów o różnych osnowach polimerowych napełnianych odpadami skórzanymi i bawełną. Próby tarcia i zużycia przeprowadzano w układzie krążek-klocek przy naciskach do 12 MPa i prędkościach tarcia 0,425 m/s i 0,85 m/s. Jako przeciwpróbki stosowano tarcze ze stali 45.
EN
In this work are presented selected results of the tribological composites with various polymeric matrixes filled with leather wastes and cotton. Friction and wear properties were performed on the following system: ring-block under pressure up to 12 MPa and frictional speed: 0,425 m/s and 0,85 m/s. As a counter samples we used disks of 45 steel.
EN
Conventional machining of polymeric composite materials is often both technically and economically less effective because the structural characteristics inherent in fibre reinforcement promote excessive tool wear. In recent years, abrasive waterjet machining (AWJM) has been proving to be successful in the machining of such materials. This paper presents a state of the art review of research in AWJM of polymeric composite materials. Among the main topics discussed are mechanisms of material removal, productivity and surface quality.
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