Abstract

Purpose: of this paper is the assessment of the strength of binding of selected bondingsystems used for fixing prosthetic works. The characteristics of cement materials used forsettling the crowns on the implant abutments were also included. The study has presentedthe evaluation of the binding strength of selected bonding systems used for fixed prostheticworks.Design/methodology/approach: Metal substructures of single-unit cement-retainedcrown were designed and manufactured using CAD/CAM technology. Created wax modelswere changed to metal substructures and settled on the abutments attached to implantreplicas with a group of commonly used dental cements. The binding strength was testedon Zwick Z 100 static tensile testing machine.Findings: It was found that MaxCem is the strongest material among the tested cementswhich can withstand the force of 175 N. Double cured cements containing the resins maywithstand very high tensile strengths which can be a problem when the crown needs to betaken off. The bonding strength of the dental cements can be influenced by the width of thefilm, its thickness, even distribution of the cement between the crown and the abutment andthe setting time. The higher the viscosity of the cement, the lower the retention of the crownon the implant abutment.Research limitations/implications: In order to limit the designing and manufacturingerrors the whole technological process should be carried out with CAD/CAM technology.The cement should be evenly distributed inside the metal cup to prevent from creation ofempty spaces between the crown and the abutment. It may be necessary to design andmanufacture special holders to maintain the samples in the testing machine to minimalizethe risk of creation initial tensile forces.Practical implications: The research gives an insight into the possibilities of choosingthe cement for bonding the crown onto the implant abutment preserving the connectionbetween the bone and the implant in case of necessity of the removal of the crown.Originality/value: The research is focused on the binding strength of the cements mostcommonly used for settling the crowns on the implant abutments. It hel

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