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Related Experiment Videos

Force degradation in elastomeric chains

S D Josell1, J B Leiss, E D Rekow

  • 1Dept of Orthodontics, University of Maryland, Baltimore College of Dental Surgery 21201, USA.

Seminars in Orthodontics
|May 9, 1998
PubMed
Summary
This summary is machine-generated.

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Orthodontic elastomeric chains lose significant force within the first hour, with continued decline over days. Force levels stabilize but remain lower, with 28-day force retention varying widely by supplier.

Area of Science:

  • Orthodontics
  • Biomaterials Science
  • Dental Mechanics

Background:

  • Elastomeric chains are commonly used in orthodontics for space closure.
  • Force degradation in elastomeric chains is a known clinical concern.
  • Understanding force decay is crucial for effective orthodontic treatment planning.

Purpose of the Study:

  • To evaluate the force degradation of elastomeric chains from various orthodontic suppliers over 28 days.
  • To compare the performance of open and closed elastomeric chain designs.
  • To determine the long-term force delivery characteristics of orthodontic elastics.

Main Methods:

  • Open and closed elastomeric chains from six different orthodontic suppliers were tested.
  • Force measurements were recorded over a 28-day period.

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  • Force degradation rates for each chain type and supplier were analyzed.

    • Main Results:

    • The most significant force loss occurred within the initial hour of placement.
    • Forces continued to decrease over the first 2 to 4 days, then stabilized.
    • At 28 days, force retention ranged from 30% to 85% of initial force.
    • Gray chains from all suppliers maintained forces above 100 g at 28 days.

    Conclusions:

    • Orthodontic elastomeric chains exhibit substantial initial force degradation.
    • Force decay characteristics vary significantly among suppliers and chain designs.
    • Clinicians should consider the long-term force decay when selecting elastomeric chains for space closure.