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Computer 3D preoperative planning and arthroscopic assisted corrective osteotomy for intra and extra-articular of distal radius malunion
Shih Juitien, MD
Armed Forces Taoyuan General Hospital, Taoyuan, Taiwan

This study evaluates the improvement of wrist function post-3D printer combined with
arthroscopy to intra and extra-articular corrective osteotomy for malunion of distal radius. From
2018 to 2022, there were 19 patients (15 male, 4 female) with intra and extra-articular fractures of
the distal radius and malunion were collected. They all underwent preoperative planning via a
computer 3-D printer combined with arthroscopic intraarticular corrective osteotomy and reduction
with internal fixation. Data were obtained through medical records and radiographic review.
Intraoperative and immediate postoperative X-rays were compared with the final X-rays. healing,
confirmed radiographically, was used to determine whether the device and internal fixation were
adequate for fixation. All malunion of fractures were corrective and healed by an average of 7.5
weeks (range, 5-14 weeks) without loss of fixation or malunion again. All patients have regular
follow-ups around 20-30 months (mean 25.2 m). Eighteen of nineteen patients improved wrist
function to good or excellent by the scores of Modified Wrist Scores. The computer-assisted 3D
planning technique led to significant improvement in all affected radius positioning parameters.
Furthermore, the postoperative values and 3D preoperative planning values did not differ. The
arthroscopy can help find the old fracture site and make good intraarticular osteotomy combined
with a 3-D printer jig. Meanwhile, perfect reduction can occur and any soft tissue lesion could be
checked.This is an effective method to correct the intra and extra-articular malunion of the distal
radius.
oral

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