scholarly journals Mechanical Behavior of Bioactive Inorganic Filler-Resin Composite Cements in a Simulated Body Fluid: Effect of Filler Material.

1999 ◽  
Vol 107 (1250) ◽  
pp. 935-943
Author(s):  
Noboru MIYATA ◽  
Wataru MATSUURA ◽  
Tadashi KOKUBO ◽  
Takashi NAKAMURA
2013 ◽  
Vol 795 ◽  
pp. 626-630 ◽  
Author(s):  
Saad Omar Alsharif ◽  
Md Akil Hazizan ◽  
Nasser Abbas Abd El-Aziz ◽  
Zainal Arifin Ahmad

The aim of this study is to investigate the effect of filler loading on the sorption and solubility of Simulated Body Fluid (SBF) of self-prepared micro dental resin composites. The prepared resin composite was based on silica (SiO2) particles and bisphenol-a-glycidyl methacrylate (Bis-GMA) as a base monomer and triethylene glycol dimethacrylate (TEGDMA) as a co-monomer. The filler was mixed with monomers, in proportions of 40, 50 and 60 wt.%. A resin matrix containing 0 wt.% filler was used as the control composition to evaluate the effect of filler loading on the sorption and solubility of SBF. The experimental methods were based on the procedure mentioned in the ISO 4049 (2009) standard for dentistry-Polymer-based restorative Materials. The sorption and solubility of resin matrix/SiO2composite decreased gradually as the filler loading increased. The increase of filler loading showed significant differences in the sorption and solubility as tested by ANOVA (P= 0.000).


2001 ◽  
Vol 218-220 ◽  
pp. 161-164 ◽  
Author(s):  
J.A. Delgado ◽  
S. Martínez ◽  
L. Morejón-Alonso ◽  
M.P. Ginebra ◽  
E. Fernández ◽  
...  

2018 ◽  
Vol 216 ◽  
pp. 150-153 ◽  
Author(s):  
Shun-Jen Hsueh ◽  
Jhen-Yi Huang ◽  
Chuen-Guang Chao ◽  
Jenh-Yih Juang ◽  
Tzeng-Feng Liu

2006 ◽  
Vol 2 (2) ◽  
pp. 73-79 ◽  
Author(s):  
Kalpana S. Katti ◽  
Phanikumar Turlapati ◽  
Devendra Verma ◽  
Rahul Bhowmik ◽  
Praveen K. Gujjula ◽  
...  

2008 ◽  
Vol 396-398 ◽  
pp. 365-368
Author(s):  
E. Gemelli ◽  
Christiane Xavier Resende ◽  
Carlos M. Lepienski ◽  
Gloria Dulce de Almeida Soares

In this study we report on the microstructure and its mechanical behavior of a Ca-P coating produced on bioactive titanium by immersion in a simplified simulated body fluid (S-SBF). The coating was probed by nanoindentation in several point times up to the formation of octacalcium phosphate (OCP). Amorphous calcium phosphate, formed after 1h of immersion in SSBF, presented the highest values of hardness (H) and elastic modulus (E). Nucleation of OCP was observed after 2-2,5h of immersion in S-SBF. From this stage on, lower values of H and E were obtained, probably due to the low dense structure of the coating.


2011 ◽  
Vol 1355 ◽  
Author(s):  
Julia C. Mirza Rosca ◽  
Eladio D. Herrera Santana ◽  
S. Drob ◽  
Agurtzane Martinez Ortigosa

ABSTRACTTitanium possesses an excellent corrosion resistance in biological environments because the titanium dioxide formed on its surface is extremely stable. When aluminium and vanadium are added to titanium in small quantities, the alloy achieves considerably higher tensile properties than of pure titanium and this alloy is used in high stress-bearing situations. But these metals may also influence the chemostatic mechanisms that are involved in the attraction of biocells. V presence can be associated with potential cytotoxic effects and adverse tissue reactions. The alloys with aluminium and iron or with aluminium and niobium occur to be more suitable for implant applications: it possesses similar corrosion resistance and mechanical properties to those of titanium-aluminium-vanadium alloy; moreover, these alloys have no toxicity.In this paper, pure Ti, Ti-6Al-7Nb and Ti-6Al-4Fe with a nanostructured surface were studied. Data about mechanical behavior are presented. The mechanical behavior was determined using optical metallography, tensile strength and Vickers microhardness.For the electrochemical measurements a conventional three-electrode cell with a Pt grid as counter electrode and saturated calomel (SCE) as reference electrode was used. AC impedance data were obtained at open circuit potential using a PAR 263A potentiostat connected with a PAR 5210 lock-in amplifier. The ESEM and EDAX observation were carried out with an environmental scanning electronic microscope Fei XL30 ESEM with LaB6-cathode attached with an energy-dispersive electron probe X-ray analyzer (EDAX Sapphire). After 3 days of immersion in simulated body fluid the nucleation of the bone growth was observed on the implant surface.It resulted that the tested oxide films presented passivation tendency and a very good stability and no form of local corrosion was detected. The mechanical data confirm the presence of an outer porous passive layer and an inner compact and protective passive layer. EIS confirms the mechanical results. The thicknesses of these layers were measured. SEM photographs of the surface and EDX profiles for the samples illustrate the appearance of a microporous layer made up of an alkaline titanate hydrogel. The apatite-forming ability of the metal is attributed to the amorphous sodium titanate that is formed on the metal during the surface treatment.The results emphasized that the surface treatment increases the passive layer adhesion to the metal surface and improves the biocompatibility of the biomedical devices inducing the bone growth on the implant surface.


Sign in / Sign up

Export Citation Format

Share Document