Retrieval study on hydroxyapatite-coated acetabular cups

W. P. Hu, Kuo-An Lai, C. H. Lin, Chyun-Yu Yang, G. L. Chang

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Objective. A large scale retrieval study of failed HA-coated acetabular cup was done by identifying and quantifying residual HA area on the surface of the retrieved cup for understanding the relevance between HA absorption and failure modes. Design. A total of 49 retrieved acetabular cups were collected through a long period of time for the study. Two main groups among the 49 cups were Landos and Osteonics cups. Methods. Image processing techniques and mathematical operation methods were used to quantify the residual HA area on the retrieved cups. Data incorporated with patients' histories and residual HA area for statistical analysis. Results. The HA coated surface of Landos cup disappears at a rate of 15.14% and 8.8% of the total surface per year for he unstable and the stable cups, respectively. The average loss rate of the HA coating of Osteonics cup in unstable cases is also faster than that in stable cases. Conclusions. The HA coating disappeared significant slower on the stable cups than did the unstable cups. The strong effect of mechanical fixation is necessary to achieve a good biological fixation result.

Original languageEnglish
Title of host publicationProceedings of the IEEE 28th Annual Northeast Bioengineering Conference, NEBC 2002
EditorsDalia El-Sherif, Karen Moxon, Saravanan Kanakasabai
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages2
ISBN (Electronic)0780374193
Publication statusPublished - 2002 Jan 1
Event28th IEEE Annual Northeast Bioengineering Conference, NEBC 2002 - Philadelphia, United States
Duration: 2002 Apr 202002 Apr 21

Publication series

NameProceedings of the IEEE Annual Northeast Bioengineering Conference, NEBEC
ISSN (Print)1071-121X
ISSN (Electronic)2160-7001


Other28th IEEE Annual Northeast Bioengineering Conference, NEBC 2002
CountryUnited States

All Science Journal Classification (ASJC) codes

  • Bioengineering

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