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Related Concept Videos

Bones of the Upper Limb: Radius01:09

Bones of the Upper Limb: Radius

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The radius is longer of the two bones that make up the human antebrachium or forearm. At the proximal end, the radius articulates with the capitulum of the humerus and the radial notch of the ulna to form the elbow joint. At the distal end, the radius articulates with the ulna via the ulnar notch, forming the distal radioulnar joint. Distally, the radius also attaches to the carpal wrist bones (scaphoid and lunate) to form the radiocarpal joint.
The radius has a nail-shaped head, and a...
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Developing 3D-Printed Wrist Splints for Distal Radius and Scaphoid Fractures.

Bernadette Tobler-Ammann1, Frédéric Schuind2,3, Loïc Voillat3

  • 1Department of Orthopaedic, Plastic and Hand Surgery, Inselspital Bern, University of Bern, Bern, Switzerland.

Journal of Wrist Surgery
|September 19, 2024
PubMed
Summary

A new 3D-printed patient-specific anatomical brace (PSAB) offers a comfortable and stable alternative for treating distal radius and scaphoid fractures. This innovative brace demonstrates superior mechanical properties compared to traditional casts.

Keywords:
3D printingadditive manufacturingdistal radius fracturepatient-specific anatomical bracescaphoid fracture

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Area of Science:

  • Orthopedics
  • Biomedical Engineering
  • Materials Science

Background:

  • Conservative treatment of distal radius and scaphoid fractures requires optimization for patient comfort and fracture stabilization.
  • Conventional casting methods can lead to complications and may not offer ideal comfort or immobilization.

Purpose of the Study:

  • To develop and evaluate a patient-specific anatomical brace (PSAB) for distal radius and scaphoid fracture care.
  • To assess the comfort, tolerability, and mechanical properties of a novel 3D-printed brace compared to traditional immobilization techniques.

Main Methods:

  • Design of multiple 3D-printed splint prototypes based on clinical expertise.
  • Preclinical testing with 10 healthy volunteers to assess comfort and satisfaction.
  • Mechanical testing of the final prototype against conventional casts and prefabricated splints.
  • Development of a mathematical algorithm for automated anatomical adaptation of the PSAB.

Main Results:

  • The final PSAB prototype achieved a 79% overall satisfaction score and weighed under 90g.
  • The brace exhibited stiffness ranging from 0.64 to 0.99 Nm/degree, outperforming conventional casts and splints.
  • The PSAB utilizes polyamide material and hook-and-loop straps for fixation.

Conclusions:

  • The developed wrist PSAB is lightweight, comfortable, and provides effective anatomical support for fracture treatment.
  • This patient-specific brace shows promise as an advanced alternative to conventional plaster casts for stable distal radius and scaphoid fractures.