Recobrimento da liga Ti-6Al-4V com hidroxiapatita pelo método sol-gel e sua aplicação a hastes femorais não-cimentadas

Abstract

ResumoO ��cob�������o �� l�g�� ����ál�c�� co�� c��â���c�� b�o������ ���� �c�l���� � fo�����ão ó���� �o ���o� �o ����l������ co����b����o ���� � ��� ����b�l�z��ão. N���� ���b�lho �����o���� � f��� c��â���c� �� h���ox�������� ���o������ ��lo ��oc���o �ol�g�l ��� ch���� �� l�g� ����ál�c� T��6Al�4V. A c������ �� ��cob�������o fo� c���c����z��� �o� ���c�o�co��� �l���ô��c� �� ����������� �o� ��f���ão �� ���o� X � ��� ����ão �o ��b�����o fo� ���l���� ��lo ����� �� c���lh������o O ����� �� c��oco������b�l����� ��o���o� q�� o ��oc���o de recobrimento por sol-gel não promoveu morte celular significativamente maior que o controle (p > 0,05). Além disso, hastes f���o���� ����o����� �� ��c������ (�x�l�����) fo���� ���q���������� ��cob����� ���l�z���o��� o ��oc���o �ol�g�l. Palavras-chave: c��â���c��� h���ox���������� �ol�g�l�� b�o������������ ������ "�� ����o"�� c��o�ox�c�����. AbstractThe coating of metallic alloys with bioactive ceramics aims to accelerate bone formation around the implant, contributing to its fixation. In this paper, the deposition of hydroxyapatite ceramic on Ti-6Al-4V alloy sheets by the sol-gel method was studied. The coating layer was characterized by scanning electron microscopy, X-ray diffraction and its adhesion to substrate was evaluated by shear testing. The citocompatibility test shows that the sol-gel coating did not provoke the cell death significantly higher than the control (p > 0.05). Moreover, femoral stems removed from patient (explants) were adequately coated using the sol-gel process.