## 3 Results
### Indentation Results  
Metals and their alloys were the first materials used in human prosthetics, which, together with other inorganic and organic materials, are still widely used today. The use of metallic materials in one or another field of technology depends on the relationship between their structure and properties. Micro indentation is a hardness testing technique for measuring the physical properties of samples, such as film layers that are often too small for conventional physical testing techniques. The samples to be tested by micro indentation must be securely mounted and also have a relatively flat test surface. Samples are often prepared using the same techniques as the samples prepared for electron microscopy, requiring mounting in a hard matrix such as epoxy and then planar polishing of the test surface. Figure 6 shows the response of the alloys during the indentation tests in the form of force-depth dependencies, and Table 3 presents the results of the indentation test with the average values for the three tests (\(\pm\) standard deviation) performed. The mean value \(\pm\) standard deviation values of at least three independent specimens were used to obtain all the results. The authors [37] stated that [PERSON]'s modulus could be predicted using Equations (1) and for the Poisson ration Equation (2). \begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Alloys** & **VeraBond** & **Kera N** & **VeraSoft** & **VeraSoft Modified** \\ \hline HV & \(429.5\pm 4.60\) & \(388.8\pm 5.10\) & \(251.5\pm 3.40\) & \(203.4\pm 5.70\) \\ \hline \hline \end{tabular}
\end{table} 
Table 2: The hardness values for alloys studied. Figure 6: Indentation curves of the studied alloys: (a) VeraBond, (b) Kera N, (c) VeraSoft, (d) VeraSoft modified. \[E=\frac{(1-v^{2})}{2 ak(\frac{a}{\mu},\,v)}\cdot\frac{p}{w} \tag{1}\]  
\[\frac{P_{1}w_{2}a_{2}}{P_{2}w_{1}a_{1}}=\frac{k(\frac{a_{1}}{h},v)}{k(\frac{a_{2 }}{h},v)} \tag{2}\]  
Mechanical properties that characterize the behavior of metals and alloys under the action of external forces are the basis of their most important applications. Because the mechanical properties of metals and alloys are structure dependent, they are very sensitive to the effects of manufacturing processes, and the same material can produce different properties. The modulus of elasticity obtained by the indentation method for the dental alloys is in the range of 46-153 GPa. The lowest value is presented by the new-modified VeraSoft (46.79 GPa). The addition of silicon had a beneficial effect on the mechanical properties, reducing the modulus of elasticity  
The biomaterials used in oral implantology must ensure the transmission of occlusal forces to the supporting tissues. For this reason, they must present sufficient mechanical resistance but also an elasticity adapted to the bone. The functional biocompatibility of the implant material mainly concerns the modulus of elasticity and mechanical strength. The elasticity mode is the characteristic with significant influence on the bone remodeling process, causing the destruction of the tissue-implant assembly in the conditions of a major difference between the components of the implant-bone assembly [38; 39; 40]. A difference between the elastic modulus causes a mechanical stress on the tissue that is different from the physiologically normal one. The finite element analysis of the behavior of the bone-implant assembly under mechanical stress indicated that a material with a small modulus of elasticity could determine a distribution much closer to that of the mechanical stresses in the surrounding bone tissue. The newly developed alloy aims to be used in medical applications, with the role of fulfilling the functional requirements and removing some disadvantages in the classic alloys used as biomaterials in human tissue.