Asian-Specific total knee system: 5-14 year follow-up study
<p>Abstract</p> <p>Background</p> <p>Knee size and body size differ in Asians compared with Caucasians. Nevertheless, many total knee arthroplasty (TKA) prostheses used worldwide are made for Western Caucasian subjects. As a result, an Asian's knee might not fit th...
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doaj-c1d6c64fa7ae419db496c098298f28202020-11-25T00:24:55ZengBMCBMC Musculoskeletal Disorders1471-24742011-11-0112125110.1186/1471-2474-12-251Asian-Specific total knee system: 5-14 year follow-up studyHosaka KunihiroSaito ShuIshii TakaoMori SeiSumino TakanobuTokuhashi Yasuaki<p>Abstract</p> <p>Background</p> <p>Knee size and body size differ in Asians compared with Caucasians. Nevertheless, many total knee arthroplasty (TKA) prostheses used worldwide are made for Western Caucasian subjects. As a result, an Asian's knee might not fit these prostheses. We studied the Flexible Nichidai Knee (FNK) system, a new model of TKA for Asian patients. The purpose of this report is to investigate the outcomes of this prosthesis retrospectively.</p> <p>Methods</p> <p>We investigated 1055 primary TKAs in 595 patients who underwent FNK for osteoarthritis (OA) in Japan and were followed for > 5 years. The knee score and function score were used for clinical evaluation. We examined the range of motion (ROM) preoperatively and at final follow-up and radiographic assessments. In addition, postoperative complications were investigated. A survivorship analysis was also conducted using two endpoints: revision for any reason and aseptic failure.</p> <p>Results</p> <p>890 knees in 502 patients were available for study (follow-up rate of 96.0%). The mean follow-up term was 8.3 years (range, 5.0-14.1 years). The knee and function score significantly improved from 41.3 to 90.3 and from 39.1 to 76.2 points, respectively (p < 0.001). The mean ROM in FNK posterior cruciate retaining (CR) type and FNK posterior-stabilized (PS) type ameliorated significantly from 107.8° and 95.6° to 110.7° and 110.4°, respectively (p < 0.01). Ten knees underwent revision surgery (infection in 3 cases, instability in 2, loosening in 2, and non-union of femoral supracondylar fracture, severe pain, and recurrent hemarthrosis in 1 each). The survivorship rate was 99.4% (95% CI, 99.0-99.8) at 5 years (n = 952 patients at risk) and 96.2% (95% CI, 91.9-100) at 12.5 years (n = 49 patients at risk).</p> <p>Conclusion</p> <p>The FNK prosthesis for Asians achieved excellent mid- to long-term survivorship and clinical results.</p> http://www.biomedcentral.com/1471-2474/12/251 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Hosaka Kunihiro Saito Shu Ishii Takao Mori Sei Sumino Takanobu Tokuhashi Yasuaki |
spellingShingle |
Hosaka Kunihiro Saito Shu Ishii Takao Mori Sei Sumino Takanobu Tokuhashi Yasuaki Asian-Specific total knee system: 5-14 year follow-up study BMC Musculoskeletal Disorders |
author_facet |
Hosaka Kunihiro Saito Shu Ishii Takao Mori Sei Sumino Takanobu Tokuhashi Yasuaki |
author_sort |
Hosaka Kunihiro |
title |
Asian-Specific total knee system: 5-14 year follow-up study |
title_short |
Asian-Specific total knee system: 5-14 year follow-up study |
title_full |
Asian-Specific total knee system: 5-14 year follow-up study |
title_fullStr |
Asian-Specific total knee system: 5-14 year follow-up study |
title_full_unstemmed |
Asian-Specific total knee system: 5-14 year follow-up study |
title_sort |
asian-specific total knee system: 5-14 year follow-up study |
publisher |
BMC |
series |
BMC Musculoskeletal Disorders |
issn |
1471-2474 |
publishDate |
2011-11-01 |
description |
<p>Abstract</p> <p>Background</p> <p>Knee size and body size differ in Asians compared with Caucasians. Nevertheless, many total knee arthroplasty (TKA) prostheses used worldwide are made for Western Caucasian subjects. As a result, an Asian's knee might not fit these prostheses. We studied the Flexible Nichidai Knee (FNK) system, a new model of TKA for Asian patients. The purpose of this report is to investigate the outcomes of this prosthesis retrospectively.</p> <p>Methods</p> <p>We investigated 1055 primary TKAs in 595 patients who underwent FNK for osteoarthritis (OA) in Japan and were followed for > 5 years. The knee score and function score were used for clinical evaluation. We examined the range of motion (ROM) preoperatively and at final follow-up and radiographic assessments. In addition, postoperative complications were investigated. A survivorship analysis was also conducted using two endpoints: revision for any reason and aseptic failure.</p> <p>Results</p> <p>890 knees in 502 patients were available for study (follow-up rate of 96.0%). The mean follow-up term was 8.3 years (range, 5.0-14.1 years). The knee and function score significantly improved from 41.3 to 90.3 and from 39.1 to 76.2 points, respectively (p < 0.001). The mean ROM in FNK posterior cruciate retaining (CR) type and FNK posterior-stabilized (PS) type ameliorated significantly from 107.8° and 95.6° to 110.7° and 110.4°, respectively (p < 0.01). Ten knees underwent revision surgery (infection in 3 cases, instability in 2, loosening in 2, and non-union of femoral supracondylar fracture, severe pain, and recurrent hemarthrosis in 1 each). The survivorship rate was 99.4% (95% CI, 99.0-99.8) at 5 years (n = 952 patients at risk) and 96.2% (95% CI, 91.9-100) at 12.5 years (n = 49 patients at risk).</p> <p>Conclusion</p> <p>The FNK prosthesis for Asians achieved excellent mid- to long-term survivorship and clinical results.</p> |
url |
http://www.biomedcentral.com/1471-2474/12/251 |
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