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Conference Paper: Mild component malalignment may not affect the postoperative range of motion in posterior-stabilised total knee arthroplasty
Title | Mild component malalignment may not affect the postoperative range of motion in posterior-stabilised total knee arthroplasty |
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Authors | |
Issue Date | 2014 |
Citation | The 34th Annual Meeting of the Hong Kong Orthopaedic Association (HKOA 2014), Hong Kong, 15-16 November 2014 How to Cite? |
Abstract | INTRODUCTION: The optimal lower limb alignment and component positions in achieving a high flexion angle in posterior-stabilised total knee arthroplasty (TKA) were not well understood. We analysed pre- and post-operative clinical and radiological parameters in patients received TKA for knee osteoarthritis.
METHODS: A total of 140 TKAs in 122(98 female, 24 male) patients were recruited. Preand post-operative lower limb long radiographs were measured for mechanical axis and individual component positions in coronal and sagittal planes.
RESULTS: The mean (± standard deviation) age of the patients was 68.4±8.0 years. All patients completed 1-year follow-up. The range of motion (ROM) increased from 93.8±20.5to 107.9±14.4 degrees (p<0.001). The mechanical axis improved from 13.3±6.7to 1.9±3.8 degrees varus (p<0.001). Linear regression analyses showed that the preoperative ROM was a predicting factor of postoperative ROM (p<0.001, y=0.4x+70.65, r2=0.32). When classifying the postoperative ROM into poor (<100 degrees), average (100-120 degrees) and good (>120 degrees), significant differences were found in tibial component coronal position and lower limb mechanical axis
(p=0.037 and 0.017, respectively). Other radiological parameters were not significant.
CONCLUSION: Our data suggest that recreation of neutral lower limb mechanical axis and tibial coronal alignment might improve the ROM after posterior-stabilised TKA. The most significant predicting factor was still preoperative ROM. |
Description | Free Paper Presentation Session 6 – Adult Joint Reconstruction: no. 6.11 |
Persistent Identifier | http://hdl.handle.net/10722/217578 |
DC Field | Value | Language |
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dc.contributor.author | Yan, CH | - |
dc.contributor.author | Ng, FY | - |
dc.contributor.author | Chan, PK | - |
dc.contributor.author | Chiu, KY | - |
dc.date.accessioned | 2015-09-18T06:05:27Z | - |
dc.date.available | 2015-09-18T06:05:27Z | - |
dc.date.issued | 2014 | - |
dc.identifier.citation | The 34th Annual Meeting of the Hong Kong Orthopaedic Association (HKOA 2014), Hong Kong, 15-16 November 2014 | - |
dc.identifier.uri | http://hdl.handle.net/10722/217578 | - |
dc.description | Free Paper Presentation Session 6 – Adult Joint Reconstruction: no. 6.11 | - |
dc.description.abstract | INTRODUCTION: The optimal lower limb alignment and component positions in achieving a high flexion angle in posterior-stabilised total knee arthroplasty (TKA) were not well understood. We analysed pre- and post-operative clinical and radiological parameters in patients received TKA for knee osteoarthritis. METHODS: A total of 140 TKAs in 122(98 female, 24 male) patients were recruited. Preand post-operative lower limb long radiographs were measured for mechanical axis and individual component positions in coronal and sagittal planes. RESULTS: The mean (± standard deviation) age of the patients was 68.4±8.0 years. All patients completed 1-year follow-up. The range of motion (ROM) increased from 93.8±20.5to 107.9±14.4 degrees (p<0.001). The mechanical axis improved from 13.3±6.7to 1.9±3.8 degrees varus (p<0.001). Linear regression analyses showed that the preoperative ROM was a predicting factor of postoperative ROM (p<0.001, y=0.4x+70.65, r2=0.32). When classifying the postoperative ROM into poor (<100 degrees), average (100-120 degrees) and good (>120 degrees), significant differences were found in tibial component coronal position and lower limb mechanical axis (p=0.037 and 0.017, respectively). Other radiological parameters were not significant. CONCLUSION: Our data suggest that recreation of neutral lower limb mechanical axis and tibial coronal alignment might improve the ROM after posterior-stabilised TKA. The most significant predicting factor was still preoperative ROM. | - |
dc.language | eng | - |
dc.relation.ispartof | Annual Meeting of the Hong Kong Orthopaedic Association, HKOA 2014 | - |
dc.title | Mild component malalignment may not affect the postoperative range of motion in posterior-stabilised total knee arthroplasty | - |
dc.type | Conference_Paper | - |
dc.identifier.email | Yan, CH: yanchoi@hku.hk | - |
dc.identifier.email | Ng, FY: fyng@hkucc.hku.hk | - |
dc.identifier.email | Chan, PK: cpk464@hku.hk | - |
dc.identifier.email | Chiu, KY: pkychiu@hkucc.hku.hk | - |
dc.identifier.authority | Yan, CH=rp00303 | - |
dc.identifier.authority | Chiu, KY=rp00379 | - |
dc.identifier.hkuros | 251973 | - |