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14th Triennial Congress of the International Federation of Societies for Surgery of the Hand (IFSSH), 11th Triennial Congress of the International Federation of Societies for Hand Therapy (IFSHT)

17.06. - 21.06.2019, Berlin

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In-vivo 3D motion analysis of the wrist during dart-throwing motion after 3-corner fusion and RSL fusion

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  • presenting/speaker Lisa Reissner - University Hospital Zurich, Balgrist University Hospital, Zurich, Switzerland
  • Gabriella Fischer - Institute for Biomechanics, ETH Zurich, Zurich, Switzerland
  • Maurizio Calcagni - University Hospital Zurich, Zurich, Switzerland

International Federation of Societies for Surgery of the Hand. International Federation of Societies for Hand Therapy. 14th Triennial Congress of the International Federation of Societies for Surgery of the Hand (IFSSH), 11th Triennial Congress of the International Federation of Societies for Hand Therapy (IFSHT), 11th Triennial Congress of the International Federation of Societies for Hand Therapy (IFSHT). Berlin, 17.-21.06.2019. Düsseldorf: German Medical Science GMS Publishing House; 2020. DocIFSSH19-736

doi: 10.3205/19ifssh1068, urn:nbn:de:0183-19ifssh10684

Published: February 6, 2020

© 2020 Reissner et al.
This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 License. See license information at http://creativecommons.org/licenses/by/4.0/.

Outline

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Objectives/Interrogation: Cadaver studies showed a better dart-throwing motion (DTM) after radioscapholunate (RSL) fusion compared to 3-corner fusion (3CF). The aim of the study was to measure the range of motion (ROM) of the wrist during DTM in patients after RSL fusion and 3CF with a 3D motion capture system and to compare it with healthy volunteers.

Methods: The kinematics of the wrist of twenty healthy volunteers as well as five patients after 3CF and five patients after RSL fusion were recorded during the performance of the DTM as well as three basic motion tasks (BMT). A marker set consisting of 13 skin markers was used to collect the kinematic data of the wrist with a 3D motion capture system. The maximum ROM was calculated from the BMT.

Results and Conclusions: During the DTM, 20 healthy volunteers showed a mean flexion-extension (FE) ROM of 99° and mean radial-ulnar deviation (RU) ROM of 44°. As expected after 3CF and RSL fusion, patients had a significantly reduced maximal ROM during BMT and DTM for the FE and RU ROM compared to the healthy controls (p<0.003). Comparing the two patients groups, the RSL patients had a significantly smaller RU ROM during the BMT than the 3CF patients (p<0.001), but the ROM during DTM did not differ significantly between the two patients groups. Regarding the ROM exploitation during the DTM, all three groups used between 61-66% of their maximal FE ROM, but for the RU ROM, the RSL patients used 131% of their maximal RU ROM, which is significantly more than the 3CF (85%) and healthy group (89%) (p<0.03).

These findings suggest that the ROM during DTM after 3CF and RSL fusion are similar, contradicting the traditional cadaver studies. After RSL fusion, patients had a better RU ROM during DTM, than during the BMT in the true RU plane.