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S2 Bioengenharia e Qualidade de Vida |
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Title:
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THE EFFECTS OF THE ALUMINIUM AND VANADIUM ON THE BONE-IMPLANT ADHESION OF TITANIUM ALLOYS: A THERMODYNAMIC STUDY
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Summary :
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ALUMINUM AND VANADIUM ARE STRENGTHENING ELEMENTS OF TITANIUM ALLOYS FOR IMPLANTS, BUT THEY ARE HARMING-FULL TO THE HUMAN BODY. THEREFORE THE EFFECTS OF THESE ELEMENTS ON THE ADHESION OF THE BONE OR HYDROXYAPATITE ONTO THIS KIND OF TITANIUM IMPLANT ALLOY SURFACE ARE VERY IMPORTANT. THE DUE CALCULATIONS WERE CARRIED OUT. CONCLUSION WAS ACHIEVED THAT IN ACID MEDIUM UP TO 25.1 PERCENTAGE OF THE ALLOY SURFACE MAY BE COVERED BY THE ALUMINA OR VANADIUM OXIDE AND, THEREFORE, THE BONE-IMPLANT ADHESION WILL BE CONSIDERABLY REDUCED IN COMPARISON TO THE SURFACE OF A PURE TITANIUM. IN ALKALINE MEDIUM THE PORTION OF THE TITANIUM ALLOY SURFACE REMAINING UNCOVERED BY HYDROXYAPATITE MAY BE LIMITED TO THAT ONE COVERED BY ALUMINA. THE PRECISE EFFECT OF THE AL AND V ON THE BONE-IMPLANT ADHESION WILL DEPEND ON THE PRE-TREATMENTS OF THE ALLOY SURFACE BEFORE THE EFFECTIVE IMPLANT.
KEYWORDS: TI-6AL-4V ALLOY, HYDROXYAPATITE COATINGS, ADHESION
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Author :
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Andrade, Mônica Calixto de
Bastos, Ivan Napoleão
Filgueiras, Maria Regina Tavares
Ogasawara, Tsuneharu 0
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Paper View :
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