Radiolucent lines in low-contact-stress mobile-bearing total knee arthroplasty: a blinded and matched case control study
<p>Abstract</p> <p>Background</p> <p>Low-contact-stress (LCS) mobile-bearing total knee arthroplasty (TKA) (Johnson & Johnson, New Brunswick, NJ; previously: DePuy, Warsawa, USA) provides excellent functional results and wear rates in long-term follow-up analyses. R...
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| Format: | Article |
| Language: | English |
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BMC
2011-06-01
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| Series: | BMC Musculoskeletal Disorders |
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| Online Access: | http://www.biomedcentral.com/1471-2474/12/142 |
| _version_ | 1819037547183996928 |
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| author | Kastner Norbert Gruber Gerald Friesenbichler Jörg Weber Patrick Leithner Andreas Sadoghi Patrick Pohlmann Katrin Jansson Volkmar Wegener Bernd |
| author_facet | Kastner Norbert Gruber Gerald Friesenbichler Jörg Weber Patrick Leithner Andreas Sadoghi Patrick Pohlmann Katrin Jansson Volkmar Wegener Bernd |
| author_sort | Kastner Norbert |
| collection | DOAJ |
| description | <p>Abstract</p> <p>Background</p> <p>Low-contact-stress (LCS) mobile-bearing total knee arthroplasty (TKA) (Johnson & Johnson, New Brunswick, NJ; previously: DePuy, Warsawa, USA) provides excellent functional results and wear rates in long-term follow-up analyses. Radiological analysis shows radiolucent lines (RLL) appearing immediately or two years after primary implantation, indicative of poor seat. Investigations proved RLL to be more frequent in uncemented TKA, resulting in a consensus to cement the tibial plateau, but their association with clinical findings and patients discomfort and knee pain is still unknown.</p> <p>Methods</p> <p>553 patients with 566 low-contact-stress (LCS) total knee prostheses were screened for continuous moderate knee pain. We compared tibial stress shielding classified by Ewald in patients suffering from pain with a matched, pain-free control group on blinded X-rays. We hypothesized a positive correlation between pain and radiolucency and higher frequency of such radiolucent lines in the most medial and most lateral zones of the tibial plateau.</p> <p>Results</p> <p>Twenty-eight patients suffered from knee pain in total. Radiolucencies were detected in 27 of these cases and in six out of 28 matched controls without knee pain. We could demonstrate a significant correlation of knee pain and radiolucencies, which appeared significantly more frequently in the outermost zones of the tibial plateau.</p> <p>Conclusion</p> <p>Our findings suggest that radiolucent lines, representing poor implant seat, about the tibial plateau are associated with knee pain in LCS patients. Radiolucencies are observed more often in noncemented LCS, and cementing the tibial plateau might improve implant seat and reduce both radiolucent lines and associated knee pain.</p> |
| first_indexed | 2024-12-21T08:23:09Z |
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| institution | Directory Open Access Journal |
| issn | 1471-2474 |
| language | English |
| last_indexed | 2024-12-21T08:23:09Z |
| publishDate | 2011-06-01 |
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| record_format | Article |
| series | BMC Musculoskeletal Disorders |
| spelling | doaj.art-cf5abc42e2704e9e9e5079180086b72b2022-12-21T19:10:24ZengBMCBMC Musculoskeletal Disorders1471-24742011-06-0112114210.1186/1471-2474-12-142Radiolucent lines in low-contact-stress mobile-bearing total knee arthroplasty: a blinded and matched case control studyKastner NorbertGruber GeraldFriesenbichler JörgWeber PatrickLeithner AndreasSadoghi PatrickPohlmann KatrinJansson VolkmarWegener Bernd<p>Abstract</p> <p>Background</p> <p>Low-contact-stress (LCS) mobile-bearing total knee arthroplasty (TKA) (Johnson & Johnson, New Brunswick, NJ; previously: DePuy, Warsawa, USA) provides excellent functional results and wear rates in long-term follow-up analyses. Radiological analysis shows radiolucent lines (RLL) appearing immediately or two years after primary implantation, indicative of poor seat. Investigations proved RLL to be more frequent in uncemented TKA, resulting in a consensus to cement the tibial plateau, but their association with clinical findings and patients discomfort and knee pain is still unknown.</p> <p>Methods</p> <p>553 patients with 566 low-contact-stress (LCS) total knee prostheses were screened for continuous moderate knee pain. We compared tibial stress shielding classified by Ewald in patients suffering from pain with a matched, pain-free control group on blinded X-rays. We hypothesized a positive correlation between pain and radiolucency and higher frequency of such radiolucent lines in the most medial and most lateral zones of the tibial plateau.</p> <p>Results</p> <p>Twenty-eight patients suffered from knee pain in total. Radiolucencies were detected in 27 of these cases and in six out of 28 matched controls without knee pain. We could demonstrate a significant correlation of knee pain and radiolucencies, which appeared significantly more frequently in the outermost zones of the tibial plateau.</p> <p>Conclusion</p> <p>Our findings suggest that radiolucent lines, representing poor implant seat, about the tibial plateau are associated with knee pain in LCS patients. Radiolucencies are observed more often in noncemented LCS, and cementing the tibial plateau might improve implant seat and reduce both radiolucent lines and associated knee pain.</p>http://www.biomedcentral.com/1471-2474/12/142Arthroplastylow-contact-stressmobile-bearingradiolucent linesknee pain |
| spellingShingle | Kastner Norbert Gruber Gerald Friesenbichler Jörg Weber Patrick Leithner Andreas Sadoghi Patrick Pohlmann Katrin Jansson Volkmar Wegener Bernd Radiolucent lines in low-contact-stress mobile-bearing total knee arthroplasty: a blinded and matched case control study BMC Musculoskeletal Disorders Arthroplasty low-contact-stress mobile-bearing radiolucent lines knee pain |
| title | Radiolucent lines in low-contact-stress mobile-bearing total knee arthroplasty: a blinded and matched case control study |
| title_full | Radiolucent lines in low-contact-stress mobile-bearing total knee arthroplasty: a blinded and matched case control study |
| title_fullStr | Radiolucent lines in low-contact-stress mobile-bearing total knee arthroplasty: a blinded and matched case control study |
| title_full_unstemmed | Radiolucent lines in low-contact-stress mobile-bearing total knee arthroplasty: a blinded and matched case control study |
| title_short | Radiolucent lines in low-contact-stress mobile-bearing total knee arthroplasty: a blinded and matched case control study |
| title_sort | radiolucent lines in low contact stress mobile bearing total knee arthroplasty a blinded and matched case control study |
| topic | Arthroplasty low-contact-stress mobile-bearing radiolucent lines knee pain |
| url | http://www.biomedcentral.com/1471-2474/12/142 |
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