Comparison of Micromechanical Parameters of Different Dental Implants Using Nanoindentation

Aleš Jíra; Vlastimil Králík; František Denk; Lubomír Kopecký

doi:10.4028/www.scientific.net/KEM.662.134

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Comparison of Micromechanical Parameters of Different Dental Implants Using Nanoindentation
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HomeKey Engineering MaterialsKey Engineering Materials Vol. 662Comparison of Micromechanical Parameters of...

Comparison of Micromechanical Parameters of Different Dental Implants Using Nanoindentation

Abstract:

The aim of this work is the description of microstructure and comparison of micromechanical properties of cylindrical shaped intraosseous parts of dental implants with plasma modified surface and with threaded modification. Differences in elastic parameters (such as reduced modulus (E_r) and hardness (H)) of investigated implants within the supporting part of the shaft and surface layer in two different directions (proximal and lateral) are compared using experimental method of nanoindentation. Machined implants of titanium alloys Ti6Al4V with plasma modified surface of sprayed titanium with hydroxyapatit (HA) Ca₁₀(PO₄)₆(OH)₂ from different batches of product were available for measurements. SEM element analysis revealed a heterogeneous structure and various concentrations of the essential chemical elements (C, O, P, Ca) on the surface of implants. Results of elastic moduli and hardness was monitored in different locations. On a large statistical set of measurements was indicated that average reduced modulus of implant shafts of titanium alloy is approximately 126 GPa. Differences of E_r in case of peripheral hydroxyapatite layer are in range of ~145 GPa – ~163 GPa according to the exact composition of surface modification in the individual batches of the product. The difference of measured values on individual samples in a proximal/lateral direction is approximately 10%.

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Periodical:

Key Engineering Materials (Volume 662)

Pages:

134-137

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.662.134

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Online since:

September 2015

Authors:

Aleš Jíra*, Vlastimil Králík, František Denk, Lubomír Kopecký

Keywords:

Dental Implant, Hydroxyapatit, Nanoindentation, Reduced Modulus

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