Unicompartmental knee arthroplasty cannot restore the functional flexion axis of a living knee to normal
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| 024 | 7 | 0 | |a 10.1007/s00167-014-3296-7 |2 doi |
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| 245 | 0 | 0 | |a Unicompartmental knee arthroplasty cannot restore the functional flexion axis of a living knee to normal |h [Elektronische Daten] |c [Tomoharu Mochizuki, Takashi Sato, Osamu Tanifuji, Koichi Kobayashi, Hiroshi Yamagiwa, Satoshi Watanabe, Yoshio Koga, Go Omori, Naoto Endo] |
| 520 | 3 | |a Purpose: The purpose of this study was to investigate the hypothesis that a medial unicompartmental knee arthroplasty might restore the functional flexion axis of a knee to normal. The flexion axis can be indirectly identified by tracking the vertical translation of anatomic landmarks that basically move around the flexion axis during a knee motion. If a unicompartmental knee could help restore the normal flexion axis, the anatomic landmarks after the arthroplasty would show the vertical translation similar to those of normal knees during a knee flexion. Methods: While performing a squatting motion, the kinematics of 17 knees were determined before and after a medial unicompartmental arthroplasty to calculate the vertical translation of a clinical epicondylar axis, using a three- to two-dimensional registration technique through a single-plane fluoroscopic system incorporating a biplanar static radiography. The results were compared with a normal data, and a statistical analysis including a two-way repeated-measured analysis of variance was performed. Results: For the medial end, from 10° to 100° knee flexion, normal, osteoarthritic, and unicompartmental knees had the average superior vertical translation of 7.3±4.2, 4.3±7.2, and 2.4±3.1mm, respectively, with statistical significance between normal and unicompartmental knees (p<0.001). The vertical translation did not return to normal post-implantation. Conclusions: A unicompartmental knee could not reproduce the normal flexion axis. As for clinical relevance, the changes of the implant design and surgical procedure may be necessary to obtain the normal flexion axis reproducing a normal motion. Level of evidence: IV. | |
| 540 | |a European Society of Sports Traumatology, Knee Surgery, Arthroscopy (ESSKA), 2014 | ||
| 690 | 7 | |a Functional flexion axis |2 nationallicence | |
| 690 | 7 | |a Unicompartmental knee arthroplasty |2 nationallicence | |
| 690 | 7 | |a Osteoarthritis and normal knees |2 nationallicence | |
| 690 | 7 | |a 3D to 2D registration |2 nationallicence | |
| 690 | 7 | |a Clinical epicondylar axis |2 nationallicence | |
| 690 | 7 | |a Vertical translation |2 nationallicence | |
| 700 | 1 | |a Mochizuki |D Tomoharu |u Department of Orthopaedic Surgery, Niigata Medical Center, Niigata City, Niigata, Japan |4 aut | |
| 700 | 1 | |a Sato |D Takashi |u Department of Orthopaedic Surgery, Niigata Medical Center, Niigata City, Niigata, Japan |4 aut | |
| 700 | 1 | |a Tanifuji |D Osamu |u Department of Orthopedic Surgery, Department of Regenerative and Transplant Medicine, Niigata University Graduate School of Medical and Dental Science, Niigata City, Niigata, Japan |4 aut | |
| 700 | 1 | |a Kobayashi |D Koichi |u Department of Health Sciences, Niigata University School of Medicine, Niigata City, Niigata, Japan |4 aut | |
| 700 | 1 | |a Yamagiwa |D Hiroshi |u Department of Orthopedic Surgery, Department of Regenerative and Transplant Medicine, Niigata University Graduate School of Medical and Dental Science, Niigata City, Niigata, Japan |4 aut | |
| 700 | 1 | |a Watanabe |D Satoshi |u Department of Orthopaedic Surgery, Niigata Medical Center, Niigata City, Niigata, Japan |4 aut | |
| 700 | 1 | |a Koga |D Yoshio |u Department of Orthopaedic Surgery, Niigata Medical Center, Niigata City, Niigata, Japan |4 aut | |
| 700 | 1 | |a Omori |D Go |u Department of Health and Sports, Niigata University of Health and Welfare, Niigata City, Niigata, Japan |4 aut | |
| 700 | 1 | |a Endo |D Naoto |u Department of Orthopedic Surgery, Department of Regenerative and Transplant Medicine, Niigata University Graduate School of Medical and Dental Science, Niigata City, Niigata, Japan |4 aut | |
| 773 | 0 | |t Knee Surgery, Sports Traumatology, Arthroscopy |d Springer Berlin Heidelberg |g 23/12(2015-12-01), 3736-3742 |x 0942-2056 |q 23:12<3736 |1 2015 |2 23 |o 167 | |
| 856 | 4 | 0 | |u https://doi.org/10.1007/s00167-014-3296-7 |q text/html |z Onlinezugriff via DOI |
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| 950 | |B NATIONALLICENCE |P 856 |E 40 |u https://doi.org/10.1007/s00167-014-3296-7 |q text/html |z Onlinezugriff via DOI | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Mochizuki |D Tomoharu |u Department of Orthopaedic Surgery, Niigata Medical Center, Niigata City, Niigata, Japan |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Sato |D Takashi |u Department of Orthopaedic Surgery, Niigata Medical Center, Niigata City, Niigata, Japan |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Tanifuji |D Osamu |u Department of Orthopedic Surgery, Department of Regenerative and Transplant Medicine, Niigata University Graduate School of Medical and Dental Science, Niigata City, Niigata, Japan |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Kobayashi |D Koichi |u Department of Health Sciences, Niigata University School of Medicine, Niigata City, Niigata, Japan |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Yamagiwa |D Hiroshi |u Department of Orthopedic Surgery, Department of Regenerative and Transplant Medicine, Niigata University Graduate School of Medical and Dental Science, Niigata City, Niigata, Japan |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Watanabe |D Satoshi |u Department of Orthopaedic Surgery, Niigata Medical Center, Niigata City, Niigata, Japan |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Koga |D Yoshio |u Department of Orthopaedic Surgery, Niigata Medical Center, Niigata City, Niigata, Japan |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Omori |D Go |u Department of Health and Sports, Niigata University of Health and Welfare, Niigata City, Niigata, Japan |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Endo |D Naoto |u Department of Orthopedic Surgery, Department of Regenerative and Transplant Medicine, Niigata University Graduate School of Medical and Dental Science, Niigata City, Niigata, Japan |4 aut | ||
| 950 | |B NATIONALLICENCE |P 773 |E 0- |t Knee Surgery, Sports Traumatology, Arthroscopy |d Springer Berlin Heidelberg |g 23/12(2015-12-01), 3736-3742 |x 0942-2056 |q 23:12<3736 |1 2015 |2 23 |o 167 | ||