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- W3136358531 abstract "We read the article “Biomechanical Evaluation of Opponensplasty for Low Median Palsy: A Cadaver Study” by Iwase et al1Iwase M. Matsuura Y. Kuniyoshi K. Suzuki T. Nagashima K. Ohtori S. Biomechanical evaluation of opponensplasty for low median palsy: a cadaver study.J Hand Surg Glob Online. 2021; 3: 74-80Abstract Full Text Full Text PDF Scopus (1) Google Scholar with great interest. The authors performed the Camitz,2Camitz H. Surgical treatment of paralysis of opponens muscle of thumb.Acta Orthop Scand. 1929; 65: 77-81Google Scholar modified Camitz,3Kato N. Yoshizawa T. Sakai H. Simultaneous modified Camitz opponensplasty using a pulley at the radial side of the flexor retinaculum in severe carpal tunnel syndrome.J Hand Surg Eur Vol. 2014; 39: 632-636https://doi.org/10.1177/1753193413498328Crossref PubMed Scopus (17) Google Scholar and Burkhalter simulation methods on cadaveric hands and measured the palmar abduction and pronation angles of the thumb during the opposition movement. The Camitz method produced a poorer pronation angle than the other methods. Interestingly, the Burkhalter simulation method resulted in a smaller abduction angle than the modified Camitz method when the tension was weak and the largest palmar abduction angle as tension increased. Based on this result, the authors suggest that the Burkhalter simulation method may improve pronation. We commend this excellent study and would like to make an additional comment. We have previously reported on the measurement of palmar abduction and pronation angles of the phalanx during thumb opposition movement using a sensor, in healthy and carpal tunnel syndrome (CTS) groups.4Kuroiwa T. Fujita K. Nimura A. Miyamoto T. Sasaki T. Okawa A. A new method of measuring the thumb pronation and palmar abduction angles during opposition movement using a three-axis gyroscope.J Orthop Surg Res. 2018; 13: 288https://doi.org/10.1186/s13018-018-0999-3Crossref PubMed Scopus (10) Google Scholar,5Kuroiwa T. Nimura A. Suzuki S. Sasaki T. Okawa A. Fujita K. Measurement of thumb pronation and palmar abduction angles with a small motion sensor: a comparison with Kapandji scores.J Hand Surg Eur Vol. 2019; 44: 728-733https://doi.org/10.1177/1753193419843837Crossref PubMed Scopus (6) Google Scholar The data showed that in about half of the healthy group palmar abduction and pronation reached their maximum angles almost simultaneously but was less in the CTS group. Furthermore, the simultaneous index of the time at which palmar abduction and pronation reached their maximum angles and the severity of CTS showed a weak negative correlation, as measured by Spearman’s correlation coefficient (-0.36, Fig.). This result suggests that in a healthy hand the palmar abduction and pronation reach the highest angle almost simultaneously during thumb opposition. Focusing on the Burkhalter simulation method from Iwase et al, while palmar abduction reached its maximum angle, the pronation maximum angle looked to be similar. These small differences mean that the opponensplasty did not sufficiently mimic the healthy opposition movement. We hope that the authors can improve on this method, which is important for improving pronation, and develop a new method that would allow the thumb opposition movement to be closer to normal. Biomechanical Evaluation of Opponensplasty for Low Median Palsy: A Cadaver StudyJournal of Hand Surgery Global OnlineVol. 3Issue 2PreviewImpaired thumb opposition associated with advanced carpal tunnel syndrome may be treated by opponensplasty at the time of open carpal tunnel release. However, it is unclear which opponensplasty technique achieves the greatest functional improvement. This study aimed to compare the biomechanics of thumb opposition after Camitz, modified Camitz, and Burkhalter opponensplasties. Full-Text PDF Open Access" @default.
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- W3136358531 date "2021-05-01" @default.
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- W3136358531 title "Coordination of Thumb Pronation and Palmar Abduction During Opposition Movement" @default.
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- W3136358531 doi "https://doi.org/10.1016/j.jhsg.2021.02.004" @default.
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