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A qualitative holographic study of hemipelvic and acetabular deformation caused by different hip prostheses
Aseptic loosening of the components is probably the most common long-term complication resulting in failure of Total Hip Arthroplasty. The mechanical behaviour of bone under load is one of the contributory causes of loosening encountered at the prosthesis/cement/bone interface. The present study dea...
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| Format: | Thesis |
| Language: | English |
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Division of Biomedical Engineering
2017
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| _version_ | 1867613176839798784 |
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| access_status_str | Open Access |
| author | Spirakis, Athanasios Apostolou |
| author2 | Gryzagoridis, Jasson |
| author_browse | Gryzagoridis, Jasson Spirakis, Athanasios Apostolou |
| author_facet | Gryzagoridis, Jasson Spirakis, Athanasios Apostolou |
| author_sort | Spirakis, Athanasios Apostolou |
| collection | Thesis |
| description | Aseptic loosening of the components is probably the most common long-term complication resulting in failure of Total Hip Arthroplasty. The mechanical behaviour of bone under load is one of the contributory causes of loosening encountered at the prosthesis/cement/bone interface. The present study dealt with a series of invitro experiments conducted on epoxy resin models of human hemi-pelves with different commercially available acetabular components implanted in them. These are used for the construction of simplified models of the artificial hip joint (three-dimensional) and of the prosthesis/cement/bone acetabular interface (two-dimensional). Loading conditions for the models included tensioning of the simulated abductor muscles for the hemi-pelvic and femoral loading for the prosthesis/cement/bone interface study. The experimental method employed was real-time holographic interferometry, a stress analysis technique recently used in the biomechanical field, which permitted whole-field simultaneously inspection of deformation patterns. The holographic interferograms were interpreted in a qualitative rather than a quantitative manner. The models do not exactly represent the in-vivo situation. Since this study identified high stresses both in the hip bone as well as in the interface (prosthesis/bone) it is suggested that these stresses are implicated in the mechanical pathogenesis of loosening. The observed changes in stress levels detected in our models could serve as a guide for future designs of acetabular prostheses as well as guide a in surgical techniques. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/25792 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:31:58.458Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| publisher | Division of Biomedical Engineering |
| publisherStr | Division of Biomedical Engineering |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/25792 A qualitative holographic study of hemipelvic and acetabular deformation caused by different hip prostheses Spirakis, Athanasios Apostolou Gryzagoridis, Jasson Artificial hip joints Hip joint - Abnormalities Equipment failure Hip prosthesis - Adverse effects Holography - Diagnostic use Stress, Mechanical Biomedical Engineering Aseptic loosening of the components is probably the most common long-term complication resulting in failure of Total Hip Arthroplasty. The mechanical behaviour of bone under load is one of the contributory causes of loosening encountered at the prosthesis/cement/bone interface. The present study dealt with a series of invitro experiments conducted on epoxy resin models of human hemi-pelves with different commercially available acetabular components implanted in them. These are used for the construction of simplified models of the artificial hip joint (three-dimensional) and of the prosthesis/cement/bone acetabular interface (two-dimensional). Loading conditions for the models included tensioning of the simulated abductor muscles for the hemi-pelvic and femoral loading for the prosthesis/cement/bone interface study. The experimental method employed was real-time holographic interferometry, a stress analysis technique recently used in the biomechanical field, which permitted whole-field simultaneously inspection of deformation patterns. The holographic interferograms were interpreted in a qualitative rather than a quantitative manner. The models do not exactly represent the in-vivo situation. Since this study identified high stresses both in the hip bone as well as in the interface (prosthesis/bone) it is suggested that these stresses are implicated in the mechanical pathogenesis of loosening. The observed changes in stress levels detected in our models could serve as a guide for future designs of acetabular prostheses as well as guide a in surgical techniques. 2017-10-25T08:41:59Z 2017-10-25T08:41:59Z 1989 2017-04-05T13:11:57Z Master Thesis Masters MSc (Med) http://hdl.handle.net/11427/25792 eng application/pdf Division of Biomedical Engineering Faculty of Health Sciences University of Cape Town |
| spellingShingle | Artificial hip joints Hip joint - Abnormalities Equipment failure Hip prosthesis - Adverse effects Holography - Diagnostic use Stress, Mechanical Biomedical Engineering Spirakis, Athanasios Apostolou A qualitative holographic study of hemipelvic and acetabular deformation caused by different hip prostheses |
| thesis_degree_str | Master's |
| title | A qualitative holographic study of hemipelvic and acetabular deformation caused by different hip prostheses |
| title_full | A qualitative holographic study of hemipelvic and acetabular deformation caused by different hip prostheses |
| title_fullStr | A qualitative holographic study of hemipelvic and acetabular deformation caused by different hip prostheses |
| title_full_unstemmed | A qualitative holographic study of hemipelvic and acetabular deformation caused by different hip prostheses |
| title_short | A qualitative holographic study of hemipelvic and acetabular deformation caused by different hip prostheses |
| title_sort | qualitative holographic study of hemipelvic and acetabular deformation caused by different hip prostheses |
| topic | Artificial hip joints Hip joint - Abnormalities Equipment failure Hip prosthesis - Adverse effects Holography - Diagnostic use Stress, Mechanical Biomedical Engineering |
| url | http://hdl.handle.net/11427/25792 |
| work_keys_str_mv | AT spirakisathanasiosapostolou aqualitativeholographicstudyofhemipelvicandacetabulardeformationcausedbydifferenthipprostheses AT spirakisathanasiosapostolou qualitativeholographicstudyofhemipelvicandacetabulardeformationcausedbydifferenthipprostheses |