|
| << previous | next >> |
Journal description
All volumes of the corresponding journal
All issues of the corresponding volume
All articles of the corresponding issues
Details for article 4 of 9 found articles
| Title: |
Failures of yttria-stabilised tetragonal zirconia: 52 retrieved ceramic femoral heads of total hip prostheses |
| Author: |
Fernández-Fairén, M. Sala, P. Gil, F.J. |
| Appeared in: |
Bio-medical materials and engineering |
| Paging: | Volume 16 (2006) nr. 6 pages 415-422 |
| Year: |
2006-11-15 |
| Contents: |
Fifty two ceramic femoral heads have been investigated after implantation. All heads had articulated against ultra high molecular weight polyethylene (UHMWPE) cups. Examination of the heads shows changes in sphericity and surface roughness due to the wear. The behaviour of these retrieved heads after clinical use confirms the problems derived from the use of yttria-stabilised tetragonal zirconia heads. In this paper, a failure mechanism for this type of ceramic is proposed. The slow yttria dissolution produces the transformation from tetragonal to monoclinic phase with a volume change. This fact provokes an important decrease in mechanical properties favouring wear. The yttria dissolution and the zirconia solid transformation were confirmed by X-ray diffraction. |
| Publisher: |
IOS Press |
| Source file: |
Elektronische Wetenschappelijke Tijdschriften |
Details for article 4 of 9 found articles
| << previous | next >> |