Improving standard volar plate fixation in 3D-guided corrective osteotomy of the distal radius: evaluation of a shim instrument

Authors

  • Emilia Gryska Department of Hand Surgery, Sahlgrenska University Hospital, Mölndal, Sweden; Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden https://orcid.org/0000-0002-7912-2232
  • Katleen Libberecht Department of Hand Surgery, Sahlgrenska University Hospital, Mölndal, Sweden; Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden https://orcid.org/0009-0003-4030-106X
  • Charlotte Stor Swinkels Department of Hand Surgery, Sahlgrenska University Hospital, Mölndal, Sweden; Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden; Department of Medical Physics and Biomedical Engineering, Sahlgrenska University Hospital, Gothenburg, Sweden https://orcid.org/0009-0005-8481-7935
  • Peter Axelsson Department of Hand Surgery, Sahlgrenska University Hospital, Mölndal, Sweden; Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden; Department of Medical Physics and Biomedical Engineering, Sahlgrenska University Hospital, Gothenburg, Sweden https://orcid.org/0000-0003-2318-6824
  • Per Fredrikson Sahlgrenska University Hospital, University of Gothenburg https://orcid.org/0000-0001-9753-8787
  • Anders Björkman Department of Hand Surgery, Sahlgrenska University Hospital, Mölndal, Sweden; Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden; Department of Medical Physics and Biomedical Engineering, Sahlgrenska University Hospital, Gothenburg, Sweden

DOI:

https://doi.org/10.2340/jphs.v59.39839

Keywords:

Virtual surgical planning, 3D, PaPatient-specific instruments, Distal radius, Extra-articular, Osteotomy

Abstract

Standard volar plates often do not fit the surface of the malunited distal radius after osteotomy, necessitating an offset angle for accurate volar tilt correction. The correction can be achieved if the plate is held at the correct angle when the distal screws are locked. With the advantage of 3D surgical planning and patient-specific instruments, we developed a shim instrument to assist the surgeon in securing the plate at the intended angle when locking the distal screws, and evaluated radiological results. Five female patients aged 63–74 with dorsally angulated extra-articular malunions underwent surgery using 3D-printed guides and the shim instrument. The plate position, drilling guide alignment, screw placements, and distal radius correction on postoperative CTs were compared with the surgical plans. Errors were measured using an anatomical coordinate system, and standard 2D radiographic measures were extracted. Preoperative dorsal tilt ranged from 16° to 35°, and postoperative volar tilt from 1° to 11°. 3D analysis revealed mean absolute correction errors of 6.1° in volar tilt, 1.6° in radial inclination, and 0.6 mm in ulnar variance. The volar tilt error due to the shim instrument, indicated by the mean angle error of the distal screws to the plate, was 2.1° but varied across the five patients. Settling of the distal radius, due to tension during and after reduction, further contributed to a mean loss of 3.5° in volar tilt. The shim instrument helped with securing plates at the intended angle; however, further correction improvements should consider the tension between the fragments of osteoporotic bone.

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Author Biographies

Emilia Gryska, Department of Hand Surgery, Sahlgrenska University Hospital, Mölndal, Sweden; Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden

Department of Hand Surgery, Sahlgrenska University Hospital, Mölndal, Sweden

Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden

Katleen Libberecht, Department of Hand Surgery, Sahlgrenska University Hospital, Mölndal, Sweden; Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden

Department of Hand Surgery, Sahlgrenska University Hospital, Mölndal, Sweden

Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden

Charlotte Stor Swinkels, Department of Hand Surgery, Sahlgrenska University Hospital, Mölndal, Sweden; Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden; Department of Medical Physics and Biomedical Engineering, Sahlgrenska University Hospital, Gothenburg, Sweden

Department of Hand Surgery, Sahlgrenska University Hospital, Mölndal, Sweden

Department of Medical Physics and Biomedical Engineering, Sahlgrenska University Hospital, Gothenburg, Sweden

Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden

Peter Axelsson, Department of Hand Surgery, Sahlgrenska University Hospital, Mölndal, Sweden; Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden; Department of Medical Physics and Biomedical Engineering, Sahlgrenska University Hospital, Gothenburg, Sweden

Department of Hand Surgery, Sahlgrenska University Hospital, Mölndal, Sweden

Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden

Per Fredrikson, Sahlgrenska University Hospital, University of Gothenburg

Department of Hand Surgery, Sahlgrenska University Hospital, Mölndal, Sweden

Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden

Anders Björkman, Department of Hand Surgery, Sahlgrenska University Hospital, Mölndal, Sweden; Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden; Department of Medical Physics and Biomedical Engineering, Sahlgrenska University Hospital, Gothenburg, Sweden

Department of Hand Surgery, Sahlgrenska University Hospital, Mölndal, Sweden

Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden

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Additional Files

Published

2024-05-15

How to Cite

Gryska, E., Libberecht, K., Stor Swinkels, C., Axelsson, P., Fredrikson, P., & Björkman, A. (2024). Improving standard volar plate fixation in 3D-guided corrective osteotomy of the distal radius: evaluation of a shim instrument. Journal of Plastic Surgery and Hand Surgery, 59, 46–52. https://doi.org/10.2340/jphs.v59.39839

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Original Research Articles