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Related Experiment Video

Updated: Nov 5, 2025

Directed Cellular Self-Assembly to Fabricate Cell-Derived Tissue Rings for Biomechanical Analysis and Tissue Engineering
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Avoiding Ring Avulsion Injuries With Silicone Rings: A Biomechanical Study.

Callie A Jewett1, Sasidhar Uppuganti2, Mihir J Desai3

  • 1Department of Orthopaedic Surgery Vanderbilt University Medical Center, Nashville, TN.

The Journal of Hand Surgery
|May 18, 2021
PubMed
Summary

Silicone rings demonstrate a significantly lower failure force than metal rings, potentially preventing devastating finger avulsion injuries. Their use is encouraged in high-risk professions.

Keywords:
Avulsion injurycompletion amputationmicrosurgeryring avulsion

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Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering
  • Trauma Research

Background:

  • Finger avulsion injuries are severe upper extremity traumas often necessitating complex reconstructive surgery or amputation.
  • The increasing popularity of silicone rings necessitates an understanding of their safety profile concerning ring avulsion injuries.

Purpose of the Study:

  • To biomechanically compare the failure forces of silicone and metal rings in simulated finger avulsion scenarios.
  • To evaluate the efficacy of silicone rings in preventing degloving injuries during avulsion events.

Main Methods:

  • Cadaveric forearms underwent simulated ring avulsion using custom fixtures with silicone and metal rings of various sizes.
  • Ultimate failure force was measured by applying an increasing upward force until ring separation or failure.
  • Silicone ring failure force was also assessed in a clenched fist simulation.

Main Results:

  • Silicone rings exhibited an average ultimate failure force of 53.0 N, substantially lower than metal rings (495.2 N).
  • In a clenched fist position, silicone ring failure force increased to an average of 99.9 N.
  • No degloving injuries were observed in the silicone ring avulsion simulations.

Conclusions:

  • Silicone rings possess a biomechanically lower failure force compared to metal rings, suggesting a protective role against avulsion injuries.
  • The findings support the recommendation of silicone ring use in occupations with a higher risk of finger avulsion, such as heavy labor.