Influence of the inter-mediate layer on the metal-ceramics bond strength
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Zofia Kula
Engineering of Biomaterials 2019;(152):21-28
Fixed alloy and ceramic prostheses constitute an important part of remedies available at the disposal of restorative dentistry. The successful treatment with fixed prostheses made of alloy or ceramics, or a combination of both materials, depends to a large extent on the thorough diagnosis of the masticatory organ, as well as the proper planning of clinical and laboratory procedures. The best results can only be achieved if the material chosen for the permanent prosthesis and the method of developing the tooth is also adjusted to the patient’s expectations. Although this type of solution has been known for a very long time, it is still very popular among patients. This is due to very good durability and appropriate aesthetics, which is very important for patients. High aesthetics is achieved by veneering the metal framework construction with oxide ceramics that almost identically reflect the hard tooth tissues. In this work, we used the Remanium CSe alloy with layers of powder and paste applied to the surface. The samples were subjected to the roughness, porosity, as well as elemental analysis in a given area of ​​ceramics. The conducted examinations showed that the intermediate (opaque) layer affects the connection of the alloy with ceramics. The best results were achieved when the porosity was minimal. Based on the results of the study, it was found that the type of intermediate layer did not influence the strength of the alloy with ceramics. It was confirmed that the roughness parameter significantly affected the strength of the metal-ceramic bond. Morphological studies via SEM scanning microscopy showed that after firing, changes occurred in the concentration of elements at the ceramic-alloy border.
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