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Research and Development of a 3D-Printed Dynamic Finger Flexion Orthosis for Finger Extension Stiffness-A Preliminary
June-Tzu Yu1, Yi-Chao Huang2,3, Chen-Sheng Chen1
1Department of Physical Therapy and Assistive Technology, National Yang Ming Chiao Tung University, Taipei 112, Taiwan.
Bioengineering (Basel, Switzerland)
|April 27, 2024
Summary
A new 3D-printed dynamic finger flexion orthosis improves hand function after injury. This device enhances range of motion and reduces stiffness, aiding in recovery and daily activities.
Area of Science:
- Orthopedic biomechanics
- Rehabilitation engineering
- Additive manufacturing in medicine
Background:
- Finger extension stiffness is a common post-traumatic complication impairing hand function.
- Current dynamic splints have limitations in efficacy and may hinder functional activities.
- Need for improved orthotic solutions for post-traumatic finger stiffness.
Purpose of the Study:
- To develop a novel dynamic finger flexion orthosis using additive manufacturing (AM).
- To enable independent stretching of each finger joint.
- To analyze the clinical improvement in range of motion (ROM) and hand function.
Main Methods:
- Development of a custom dynamic finger flexion orthosis via AM technology.
- A 7-week home-based rehabilitation program utilizing the developed orthosis.
- Outcome measurements included Total Active Motion (TAM), Tip-to-Finger Distance (TPD), and DASH questionnaire scores.
Main Results:
- Significant average increase in TAM by 72.7 degrees.
- Significant average decrease in TPD by 3.5 cm.
- Average reduction in DASH score to 9.5 points, indicating improved hand function.
Conclusions:
- The developed AM-based dynamic orthosis effectively improved hand function and ROM in a post-traumatic case.
- The home-based rehabilitation program facilitated a 53.6% average increase in TAM.
- This novel orthosis offers a promising solution for managing finger extension stiffness and restoring hand function.
