In vivo measurement of volumetric wear of a total knee replacement.
A new Roentgen Stereophotogrammetric Analysis (RSA) system is reported; it can measure penetration of the metallic femoral component of a Total Knee Replacement (TKR) prosthesis into the polyethylene bearing on the tibial component. This system was used to analyse a study group of six Anatomic Gradu...
| Príomhchruthaitheoirí: | , , , , , |
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| Formáid: | Journal article |
| Teanga: | English |
| Foilsithe / Cruthaithe: |
2006
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| _version_ | 1826264662887366656 |
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| author | Gill, H Waite, J Short, A Kellett, C Price, A Murray, D |
| author_facet | Gill, H Waite, J Short, A Kellett, C Price, A Murray, D |
| author_sort | Gill, H |
| collection | OXFORD |
| description | A new Roentgen Stereophotogrammetric Analysis (RSA) system is reported; it can measure penetration of the metallic femoral component of a Total Knee Replacement (TKR) prosthesis into the polyethylene bearing on the tibial component. This system was used to analyse a study group of six Anatomic Graduated Components (AGC) knee prostheses more than 6 years post-implantation, and to compare with a control group of six newly implanted AGC prostheses. The volumetric loss of polyethylene was estimated by imaging each prosthesis at a series of different knee flexion angles. The mean difference between the RSA measured polyethylene bearing thickness and the manufacturer's quoted values for the control group was -0.03 mm (SD 0.17). The estimated linear penetration at 6.4 years in this prosthesis was determined to be 0.1 mm/year. Volumetric wear was estimated to be 600-700 mm(3)/year at 6.4 years, equating to approximately 100 mm(3)/year. This does not appear to be clinically significant amount of wear as this prosthesis has excellent survival at 10 years. |
| first_indexed | 2024-03-06T20:11:27Z |
| format | Journal article |
| id | oxford-uuid:2ab11a2a-4ae1-4ae8-9776-94b5a0f060dd |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T20:11:27Z |
| publishDate | 2006 |
| record_format | dspace |
| spelling | oxford-uuid:2ab11a2a-4ae1-4ae8-9776-94b5a0f060dd2022-03-26T12:26:36ZIn vivo measurement of volumetric wear of a total knee replacement.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:2ab11a2a-4ae1-4ae8-9776-94b5a0f060ddEnglishSymplectic Elements at Oxford2006Gill, HWaite, JShort, AKellett, CPrice, AMurray, DA new Roentgen Stereophotogrammetric Analysis (RSA) system is reported; it can measure penetration of the metallic femoral component of a Total Knee Replacement (TKR) prosthesis into the polyethylene bearing on the tibial component. This system was used to analyse a study group of six Anatomic Graduated Components (AGC) knee prostheses more than 6 years post-implantation, and to compare with a control group of six newly implanted AGC prostheses. The volumetric loss of polyethylene was estimated by imaging each prosthesis at a series of different knee flexion angles. The mean difference between the RSA measured polyethylene bearing thickness and the manufacturer's quoted values for the control group was -0.03 mm (SD 0.17). The estimated linear penetration at 6.4 years in this prosthesis was determined to be 0.1 mm/year. Volumetric wear was estimated to be 600-700 mm(3)/year at 6.4 years, equating to approximately 100 mm(3)/year. This does not appear to be clinically significant amount of wear as this prosthesis has excellent survival at 10 years. |
| spellingShingle | Gill, H Waite, J Short, A Kellett, C Price, A Murray, D In vivo measurement of volumetric wear of a total knee replacement. |
| title | In vivo measurement of volumetric wear of a total knee replacement. |
| title_full | In vivo measurement of volumetric wear of a total knee replacement. |
| title_fullStr | In vivo measurement of volumetric wear of a total knee replacement. |
| title_full_unstemmed | In vivo measurement of volumetric wear of a total knee replacement. |
| title_short | In vivo measurement of volumetric wear of a total knee replacement. |
| title_sort | in vivo measurement of volumetric wear of a total knee replacement |
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